SCIENTIFIC ABSTRACT LEPETOV, V.A. - LEPIK, YU.R.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000929320004-2
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: August 23, 2000
• Sequence Number: 4
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

SOV/138-58--11-6/14
Calculations on Pressure Hoses of Fabric Construction
was made by comparing strengths of flat specimens of
impregnated fabric with different numbers of layers.
The results of these tests are given in Table 2. Actual
burst pressure is compared with burst pressure cal,2ulated
from Formula (3) without correction by coefficient G"
2
C" is then deduced from the difference between tb-se
2
values and Formula (9) is found to give a close approxi-
mation to these deduced -.-al,.;es for general calculation of
C" for any given number of layers of fabric, i Using
2
these values of C" , from Eq (9), burst pressures cal,:ulated
2
according to Formulae (3) ani. (6) are given for comparison
with actual values.
A parameter Tj is introduced, designated "relative !cad
bearing capacity of the carcass", or PB/' - IL
convenient to express n as a dimensionless index of them
ratio of the product of the coefficients C: , C" and Cr
2 2
for a hose with i layers of fabric to the product of thes,~-
Card3/4. coefficients for a hose with i = 2 layers of fabric as in

SOV/138-5B-11-6/14
Calculations on Pressure Hoses of Fabric Construction
Formula (12). The parameter I is plotted against i
for a 51-mm diameter hose in Figure 8. As coefficients
C" and C are independent of di&neter and C~- changes
2 5
relati-.cly little with diameter (where the number of layers
are few), the parameter il , calculated an#d given
graphically against number of layers i , for any
particular size of hose as in Figure 8, gives immediately
a combined.term for the coefficients which must be
entered into Eq (6) when calculating number of layers
required to give a certain burst pressure in a pipe of
given diaMeter and strength of fabric.
There are B figures and 2 tables.
ASSOCIATION: Moskovskly inBtitut tonkoy kh1micheskoy
tekbLnologii im. m.V. Laxonaa va (Koscov Institute
of Chemical Pi-ecisiori imeni M.V. Lomon-:-,scr)
Card 4/4

15(9) PHASE I BOOK EXPLOITATIDN SOV/3120
Lepetov, Vasilly Aleksandrovich
Rezinovyye tekhnicheskiye izdeliya. Industrial Rubber Products)
Leningrad, Gookhimizdat, 1959. 4~5 p. Errata slip Inserted.
5,000 copies printed.
Ed.: P.I. Esman; Tech. Ed.: Ye..YA. Erlikh
PURPOSE: This book is intended as a textbook for students speciali-
zing in rubber technology at schools of higher technical education.
It may also be useful to engineers and technicians in the rubber
insustry.
COVERAGE: The textbook contains data on the ussign, equipment and
technological processes connected with the manui'acture of industrial
rubber products such as drive belts, belting, hose, ebonite, machine
parts, articles of rubberized fabrics and foam rubber, and hollow
rubber articles. It also includes data on structural materials
including rubber, textiles, and metals used in conabructions of
Industrial rubber products. The author thanks the staff of the
Card 1/11

Industrial Rubber Products SOV/3;20
Rubber Technology Department of the MITKhT Institute Im. M.V.
Lomonosov. References Follow th,e chapters of the book.
TABLE OF CONTENTS:
Foreword 9
Introduction: General Characteristics of Industrial Rubber Goods 11
PART I. MANUFACTURING TECHNOLOGY OF INDUSTRIAL RUBBER PRODUCTS
Ch. 1. Special-Ch&racteristics of Technological Processes Used in
the Manufacture of Ind~stri&l Rubber Pr:)ducts 13
Calender processing of fabrics and rubber compounds 13
Main procedures in the manufacture of blanks for industrial
rubber goods 23
Assembly of screw-type presses and accessories for subse-
quent processiog of rubber compounds 27
Vulcanization of industrial rubber products 39
Vulcanization ander atmospheric pressure 39
Vulcanization under pressure of a vulcanizing medium 41
Card 2/11

Industrial Rubber Products SOV/3120
Vulcanization under high pressure 43
Rejects in press vulcanization 55
Molds used in vulcanization 56
Finishing of Industrial rubber products 64
Bibliography 67
Ch. 2. Driving Belts, Conveyor Belts, and Other Belting 69
Flat driving belts and belting 69
Flat drive belts 69
Conveyor and elevator belts, cALterpillar treads,and other
belting 73
Manufacturing flat drive belts, conveyor belts, and other
belting 78
V-type belts go
Bibliography 102
Ch. 3. Hose and Tubular Industrial Rubber ArUzles 103
Main types and designs of hose 103
Fabric-rubber press hose 105
card 3/11

Industrial Rubber Products SOV/3120
Suction hose 113
Basic equipment for manufacturing hose 116
Manufacturing of hose 126
Tubular industrial rubber articlea 136
Bibliography 140
Ch. 3. Ebonite Articles 142
Special,characteristics of'materials and proi,.esses used in the
production of ebonite 142
Manufacture of ebonite articles 153
Bibliography A2
Ch. 5. Parts for Machines 163
General observations 163
Chief methods of rubber-to-metal bonding 164
Rubber coverings for metal products 169
Rubber-metal load carrying parts 185
Rubber and rubber-fabric goods 195
Molded rubber products 195
Nonmolded rubber products 197
Card 4/11

Industrial Rubber Produots SOV13120
Use of rubber thread In the manufacture of consumer goods 208
Bibliography 209
Ch. 6. Articles Made of Rubberized Fabrics 212
Rubberized fabrics 212
Designs and types of rubberized fabrics 220
Manufacture of airships and floats 225
Bibliography 229
Ch. 7. Sponge and Hollow Rubber Products 231
General observations 231
Manufacturing sponge rubber proqucts 231
Molded hollow articles 237
Molded articles having an open cavity 244
Bibliography 245
PART II. STRUCTURAL MATERIALS FOR THE
MANUFACTURE OF INDUSTRIAL RUBBER: PRODUCTS
Ch. 8. Rubber 246
Card 5/11

Industrial Rubber Products
SOV/3120
General observations 246
Special properties of rubber under defoms.tion conditions 251
Analytic relation.between stress and deformation of rubber and
its mechanical properties 254
Physical and mechanical characteristics of rubber as structural
material , 273
Effect 6f temperature on properties of rubber 278
Bibliograp~y 279
Ch. 9. Reinforcing Materials for Industrial Rubber Products 281
Textile materials 281
Types of fibrous materials 281
Yarn 0-85
Basic industrial characteristics of yarn and thread 286
Statistical evaluation of yarn properties. 289
Static and dynamic fatigue of yarn 293
Yarn used in the manufacture of industrial rubber products 294
Fabrics 294
Structure of fabrics 294
Card 6/11

Industrial Rubber Products SOV/3120
Basic industrial characteristics of fabrics 296
Strength of a cluster of thread 300
Deformation of fabrics in stretching 301
Standard and tangential characteristics of biaxially
stretched fabrics 302
Resistance of fabrics to stretching in various directions 305
Resistance of fabrics to tearing 3o6
Fabrics used in the manufacture of industrial rubber pro-
ducts 307
Other types of structural textile parts 311
Metal parts 315
Special characteristics of rubber-fabric or rubber-metal ma-
terials 317
Bibliography 319
PART III. DESIGN CALCULATIONS FOR CCNSTRUCTIONS
OF INDUSTRIAL RUBBER PRODUCTS
Ch. 10. Calculations for Drive Belts and BeltinE, 321
Card 7/11

Industrial Rubber Products
SOV/3120
General observations 321
Calculations for flat drive belts made of rubberized fabrics 321
A. Calculations for flat drive belts by the peripheral
stress per centimeter .41dth of packing 322
B. Calculations for flat driVe belts by the traction force 332
Calculations for V-type drive belts 336
A. Calculations for V-type driv6 belts by the stress 336
B. Calculations for V-type driving belts by the traction
force 342
Calculations for belting 345
A. Determining the number of plies for a conveyor belt by
an approximation of the engine power 345
B. Determining the number of plies for a conveyor belt by
solving for maximum tension 348
C. Calculations for belting of bucket elevators 350
Bibliography 351
Ch. 11. Calculations for Hollow Rubber-Fabric Envelopes 352
General observations 352
Balloon envelope 353
Card 8/11

Industrial Rubber Products SOV/3120
Gasometer envelope 356
Envelope of an Inflated boat 357
,Bibliography 359
Ch.. 12. Calculations for Articles of Tubular Construction 36o
General observations 36o
Calculations for pressure hose 36o
Geometry of the pressure hose carcass 361
A. Calculati)ns for pressure hose with a uniform carcass 364
Correction factors In a design equation 367
Particular applications of the general equation pressure
hose 370
Carrying capacity of the carcass 380
B. Calculations for pressure hose with a nonuniform car-
cass 381
Hose with metal (wire) braiding 384
Hose with metal cord or wire gauze windings 388
Hose with spiral wires 388
Calculations for auction hose 390
Resistance of suction hose to warping under the action of the
local external load 390
Card 9/11

Industrial Rubber Products SOV/3120
Stability of spiral wire reinforced houe under uniform external
load 393
Pressure loss in suction hose 394
Determining number of hollow packing rings 398
Bibliography 399
Ch. 13. Calculations for Load Carrying Industrial Rubber Products 401
General observations 401
Determining number of flange seals 401
Purpose and types of packings 401
Industrial estimate of elastic cables 409
Tension in the rubber-thread series (in the strand) 415
Determining the sagging in vibration absorbers 418
Determining static yield in a crankshaft damper 422
Determining the characteristles of rubber envelopes 426
Calculated ratio of load and flexure of flat rubber envelopes
to the rigie~. center 428
Design of the instrument determinin6 the characteristics
of flat round envelopes with a rigid center 429
Card 10/11

Industrial Rubber Products
SOV/3120
Detennining, the relative modulus of a rubber envelopes with a
rigid center 430
Plotting the characteristics of a rubber envelope 432
Calculations for flat rubber shock-ab3orbing packing 433
Bibliography 439
Subject Index 441
AVAILABLE: Library of Congress
TM/jb
Card 11/11 2-15-60

AUTHUILiS: Shlyaklunan, A. A. ax,,1 Lepctov, V. A. 11 / 135 1 r2 4
TITIZ -Calculations on 1,11osepi-pes in Flexure (K v0zrGSU
rascheta rukavov na izt;jb)
Par'. I. Relation Between the, Radius, of Curvai;ure on
the Longitudinal Axis of t~ie Pipe., the Properti-es of
the Materia'~ and the Geometrical 13ection Gf the
Hosepipe (Soobshcheniye I,, Zavisimost, mozlidu radiusoi:i
krivizny prodollnoy csj rukava, 'lkharakteristikaipi
materiala i geo.,iietriyey sechemiya rukava)
PERIODICAL: Kauchuk i rezina.. 1959, Nr 2,. pp (USSR)
ABSTRACT: There is a need to cst-,,.bLish methods of calcu'latin.- the
iainimu:a bend radius to vihion' hose --a-ri be subjected
without per,:;anent defo.imation of its cross-section and
to ensure the requ-ired lanu-th of service at normal and
at low temi)eratuxes. A marhemati,~al cal,;ulation is
Ljven. to E!stabliml "Che relation-s bietween ion..iuudinal
bend radius oind deformation of the cros.~:-3action for pipe
of -iver.L material and con.3truction. Frcm Eq (8) the
reFiction force R (see Ficr ~2) actin--, on the T~erinhery
of the flose for L, iven bend radius ana the .-,inusoidal
pressure distribution shown in Fi~; can be dr-duc,_--d.
Cnrd 1/3 The dofoimmaTinn of the hori 7on,;,il bo found

on iiu~;onii~,2s in
the Radiuo of Curvature oi. ~-he Y,,--40 of -1
the Pronerties of t.-.hc- Material axid I;,.--u7:,A;ricLi.-i of tile
Hosepipe
fror.,i Ea (!())~ whei-, 1~ is thc~ Lu~3 cf of
the he ~-, af' p k -
; 'a V1110le :af-d E T c;f an
annular se~-,Liori of ai,, d -.,; i d ~ n7.
r is the radiuj of hos.: and e thc; radius.
The deformut---~,u oi-, the !,,3rticaI diai.,.oter -;,I- found from
Eq (21) to be the ~zime as that. on the horizzantal one.
From Eq (25) the bind D'.11JILS fc)[' ~1-117 jJvc7i relative
deformation r-~ = (zNjr) c~-,n bz,.~ found. 11"he critical
value of 6 -, C-:ta,f,-? f0und by cii-Icala-cicri. or established
experimentally, heric--, a (rL,,iniraum) bend radius
can. be est,3bLished f(~i.- a Cj.,ien condition. TIPE~ strain Ek
of Lhe fil-::~es in an annuLav when z is tho
Coordinate of the thir;xrlc-c~-; of th~,,, L,Jir.~,, ri~lated to
~;he radial def~)ri,-Aioja e., Eq the
cl-itical vrilu-z- of L.Ijii fcI* a cur~l in :-ir. anwilar
sc-~~ticn, the cr-4 rarl ia 1 4 cit C, C 11-111-De
T1
ex'i,j;,~Ic, cli- criiical

'-;UV/136- 59-,~-10/24
Calculations on Hosepipes in Flexure. Part i. Relation Bet,.,,reen
the Radius of Curvature on the Longitudinal Axis of the Pipe,
the Properties of the Mkaterial and the Geometrical Section of the
hosepipe
cord strain 4 ek at the lifait of proporrionality i5 taken
at 11 X 10 Vlith a 25 dia;mcter hose aith annular
cords of 1 mm diameter, F- is 1%. From these critical
values of radial. str~iin or deformation, critical bend
radii of the hose can be found from Ea (25),
There are 4 figures and 12 references, 8 of which are
Soviet, 3 Eri~~lish, 1 Ger-rian.
kSSOCIkTIOI;- llauchno-issledovatel'2kiy insuitut ri---inovoy
prom-y-shleraiast'
Iridusti-y).
Card 3/3

log
I I ; L, 1* 1
r I
ii- ILI
;.:
rl
'19

mom ~

KNO
it

anti lit *11
il
BPI.

1gill

sov/4419
hine-Building Materials (Cont.) 267
liandbook on Mac 267
of tires
Specification marldng" 263
Agricultural tires
for bicycles 269
2-10
ft,.stic tires
bber tires 271
solid-ru 271
Valve stems nd bands
Ibber belts 6
ced r,
etc 275
Fiber-rainfor
e belts, fan beltsp
driv 280
Belt'; Ii. e.
er belts 280
convey
goses, rced rubber
of fiber-rainfO 2B4
287
Supply hoses
forced rubber-textile hoses al braiding
d vith met
i 289
n
Re
Rubber-fiber hoses reinforce 29)
supply and auction hoses
suction hoses in
t'
ion 294
298
g
cat
Methods Of tes
to technical syeclf'
hoses made 303
Supply 304
piping
bber Parts in machine building
311
Ru
Rubber packings 314
Rubber-metal bushinP 319
rts
bber shock-absorbing Pa 319
Ru
Auxiliary rubber materials aterials and articl8s
in
i 319
321
ng
Electric insulat
oft rubber
ticles
from
rbonite ar
ar L materl, is made
Electric insulating
LXPETOV, V.A.
TechnologIcal calcul4tiOn of shOCIC-aboorblng cables. Kauch.1 res.
19 DO- 5:37-40 W 160. (MIRA 13:7)
I. Mookovskly Inatitut tonkoy
Lomononova. (Rubber goods) khimichs8koF toichnologii im. N.V.

NOVIKOV, V.I.; LEBEDEVA, L.V.
I
Investigating the deflection of a round bber membrane with a
stiff center. Kauch.i rez. 21 no.8132- 5 Ag '62. (KRA 1635)
1. Maskovskiy institut tonkoy khimicheakoy tekhnologii imeni
Lomanosova.
(Rubber--Testing)

3/1 38/62_-/X9/'X_ 2/0,06/Dr,9
A051/A126
AUTHORS; Lepetov, V.A.; Chelm,~,deyev, A.D,
TITLE: Determination of the optimum time of %ul~!anizatic,n by measurtng
the static compression modulus cf rubut~r
PERIODICAL: Kauchuk I rezina, n,,, 2, 11)02, 3t~ - 346
TE)n~ The compression modulus of rubber was used to calculate the :p-,i-
mum vulcanization time, since this Index Is found tc depend cn the degree J
vulcanization to the greatest extent. The following determinations wEre made
the relative and residual elongation, expansion modull IPOCT270-53 (,_-~Os-_ 27,:;-
-53)1, tensile stir:,ngth (GOST 262-53), swelling (,Jos.r 4.~*-4~), L,~und Zulfur
'263-53 ) of
(from the unbowid residual), hardness according to TM-2 (IM-2' (GOST
rubber. Mixtures of NR,CKC-30A (SKS-30A), CK11-26 (SIGI-26) -and nairite, were
used to determine the optimum vulcanization time. The,~m-2 (rc-2) "def-meter"
was used to determine the conditional-equilibrium 1-~ad in static c~mprt--szi:~n of
the sample by 20%, applying only the mechanical part --f the instrumc-nt The
conditional -equilibrium static compresLicn modului E was detcrmined a-c--rding
to the formula! Pztat-.- ~ hl-
Card 14 F, = 30- (ho - it, )k w_/ - tr

S/'' 3bA
Determination of the optimum time of vulcanization ... A05!/Al,-)6
state in kgl s, - the . initia!
where Pstat is the load of the stat.ic equilibrium lal height ;f the s8LmP.,e in Im,
cross-section of the sample in cm 2, I,) - the Init ime of reaching the Static C,71"
hl - the h2ight of the sample under load at the t of u.) ;:ire f,~,und experimental-
ditional-equilibrium state in cm. The parameters the formula
1y. The variation coeffi cient was determined according
t 6 . I o0
V =7-
X - mean deviation equaling2
is the arithmetic mean, d the ua ratic
Ux
where X - 2
X
+ _Rla ~_X I
n - I
- general number of tests. Obtained data
where j is the result c-f the test, n vul,,an,zation meth-
I hod for date-mining the optimum - ~ I
3nowed that the Suggested met method Is said to te ap-
od results in a lesser scattering of the indices. The me of all the in-
ation of the optimum vulcanization ti
plicable to the determin mpli5hed, consumpti'M
vestigated rubbers. A saving of rubber (up to 61-1) is accc tables, I figire
of energy and work of the technician is reduced. There are 2
ces: 2 Soviet-bloc and 1 non-Soviet-blvc- oiogli Im M-V.
,3nd 3 referen heskoy +ek]7,n
ASSOCIATION: Moskovskiy institut tonkoy khimic m '.V. L-rro-
nosov (Moscow Institute of Fine lhemiral Techno;-gy 1 M
Card 2/2 nosov
S/138/62/000/005/007/010
A051/A126
AUTHO,-IS., Fogel', V.O.;
Lepetov, V.A.; Agayants, I.M.
TITLE,: Thermophysical. characteristics of raw rubber mixes and their rela-
tion to temperature
PERIODICAL: Kauchuk I rezina, no- 5, 1962, 26 - 29
TEXT; The thermal and temperature-conductivity, as well as the thermal
capacity of raw rubber mixes were determined experimentally at Various tempera-
tures. Four raw tire mi'xes, based on CIO -30 APY, (SKS-30ARM) and NR were used
as Investigating materials in addition to one vulcanized mix (casing), based on
SKS-30ARM for reference. The method..used to Investigate ebonite mixes was used.
A new calorimeter (Fig. 1) was developed for determining the thermal capacity..
Ethyl glycol served as the calorimetric fluid. A comparison of the thermal co-
efficients of tire mixes based on SKS-30ATU4 and UR showed that there, as a rule,
are higher than those for mixes based on SKS-300M. The authors conclude that
the thermal conductivity of the raw tire mix, with a temperature range of 30 -
1000C, changes very slightly. This leads to the possibility of calculating the
Card 1/3

S/138/62/000/005/007/010
Thermophysical characteristics of raw rubber .... A051/A126
temperatures in the vulcanized articles, using the Purje differential equation.
The temperature conductance of the raw tire mixes drops and the thermal capacity
Incroases with the rising temperature.
ASSOCIATIONs Moskovskiy inatitut tonkoy khimicheskoy tekhnologii im. M.V. Lomo-
nosova (Moscow Institute of Fine Chemical Technology Im. M.V. Lomo-
nosov)
Card 2/3

TRZSHCHAIDV, V.I.; LZPETOV, V.-A,
Investigating the load on spiral elements exerted by inner contact
pressure. Kauch.i rez. 21 no.3325-30 Fw 162. (YURA 15:4)
1. Nauchno-issledovatellskiy institut rezinovoy promyshlennonti.
(Strains anu stresses) (Hose--Testing)

TMHCHaGV.. V.I.; LEPETOV, V.A.
Investigating the load of internal contact pressure and axial
stress of a pressure hose carcass made of entwined spiral elements.
Kauch.i rez. 21 no.4t26-30 Ap 162. ODA 15:4)
1. Nauchno-issledovatellskiy institut rezinovoy promyshlennosti.
(Hose-Testing) (Strains and stresses) (Rubl*rized fabrics)

TRWHOH&LOV, V.I.,- Z.~PETIV, V-A-
Design for strength of pressure hose reinforced with outer
stiff elements. Kauch.i rez. 21 no,11:27-33 N 162,
I (MIn 15:12)
1. Nauchna-4ssledovatellskiy institut resinovoy
promyshlen4beti. (Hose)
(Strength of materials)
-... 4

SUKHAREV, A.T.; LEPFTOJ, V.A.; A.".,, YTJRTSFV, L.N.
Pressure -hos-- bmided wiu~ polpt-mide fibers. Kauch.i rez. 22 no.l:
28-31 Ja 163. (!4JRA 16:6)
1. Hauchno-i.osledovatellskiy institut rezinovoy promysh'Lennosti.
(Hnse)

JV4015075
;.vruzhchmwIco, B. Kh.; Lepetxt, V. A.
5/0130/64/000/001/0021/0024
7,:ffoct of preliminary aging on chuijo in high elastioity properties of
:-abber at low temperatures
U,'C.,~.: 7.auchuk i rozinal I~Io. 1, 1964, 21-24
'-'OPTC T.,WS: hiCh elasticity property, relative elonfationg low temperature, static,
T.Qduluo I
'3V relative
~3 -U.(;T: Type SICT-10 rubber with TH-2 hardness equal to 60 and 343,o
clon.7ation has beon studied to determine the preliminary af;ing effects on rubber
stren.-,th at lov., temperatures. The specimen was subjected to 100~ axial streae at
4. emperatures from 20 to OCO after various aGing durations in a thermostat at 90C.
U -5
The ra&nitude of KI, the coefficient of increase in rigidity during and after
a&-Lng, does not depend on the determined temperature during the aging process
itself. The coefficient of increase in strength at low temperatures after different
storage time du:--ations is expressed by the product KXII (K- rigidity increase before
aCing). The static: modulus aftwaging at low temperatures is given by EXXI (F,
Cardl/2

AMISSION NR. AP4015075
high elastioity statio modulus at 26CP in k9 Boo/=2). Orig. art. hast 10 formulas,
4 figures, and 2~1419s.
ASsOCIATION: Lening:radekiy filial nsuchno-~ssled-ovatellskogo insituta resinovoy
prozor*shlennosti (L6ningrad Institute of Soientific Researoh in the Rubber Industry)
SUMTTED: 00 DATE JLCQ: 26Feb64 ENCL& 00
SUZ CODE: MA NO REP SM 003 Orm 1 000
Card2/2

LEFEMV, V.A.,- BLOKHj L.D.
Foroing of rigid dies into rubber. Nauch. 1. rez. 22 no.121
24-28 D 163. (MIRA DO)
1. Moskovskiy Inatitut tonkoy khimicheakoy tekhnologil imeni
Lomonosova.

ACCESSION UR: AP1.617165
I
S/0138/64/000/002/0024/0027
AUTHORS: Yurov3kiy,, V. S.; Arkhipov, A. M.;. Lepetov, V. A.; Kosankova,, A. S.;
Novikov,, V. I.1 Tay"buk, B. S.
TITIZ: Invo3tigation of sealing effectiveness of rubber metal seals
7-~
SOURCEs Kauchuk i resina,,,no. 2, 1964, 24-27
JOPIC TAGS: rubber metal seal, sealing, rubber hardness, sealing force, rubber
SYS 30
ABSTRACT: The rubbor-motal sealing configuration shown in Fig. 1 on the Enclosure
was in*oatiaated' using rubber inserts with differant properties (TM-2 hardness
85-95, 75-85, and 55-65). It was found that the hardnoss of the rubbor insert
played the most important part in securing the sealing effectivonesu. Experiments
showed that hardnoss was related to tho modulus of elasticity E60 (after a
60-minutle compression) by a single curve for all types of rubber used (960
SF ho - hl ; so = initial area). By pushing the metal ring into the rubbor seal
0
to a depth h and pressurizing the seal with air until it leaked, it was determined
Card 113

ACCESSION NHs AP4017165
that the following relation described the critical pressurei
( Q ~4,p b M/CM2
Pcr
(where Q = load on seal, for dcpV bp h0and r. soo Fig. 1, K empirical constant
which varied from 0.85 to 0.95, n = ompirical cons Lant -which varied from 2 to 2.5).
This equation permits the calculation of tho pressure at~which a seal will leak or,
conversely, calculation of the sealin.- forco Q rcq1iired to seal a joint at a
certain pressure. Orig. art. has., 5 fi.-uron and 2 formulao.
ASSOCIATION: Nauchno-inaledovatel'3kiy inatitut rozinovoy proqr*ohlennosti
(Scientific Research IrAtitute of the Rubbor Induatvry)
SUBMITTED: 00 DATE' ACQ: 23Mar64 ENCL: 01
SUB CODEt Hr NO UF SOV: 007 OTHER: 000
Card 2/3

ACCESSION WR# AP4017165 ENCLOSURE; 01
Fig. 1, Schevntic of' rubber-metal seal;
1- rubbor-motal dotail; 2-ecat.
Card 313

SHLYAKWAN, A.A.; ,LEFE.T(JV, V.A.; LEC111OV, I.. I.
Hydraulic strength of hose with metal braiding. Fauch. i reze
23 no. 3:37-40 Mr 164. (MIRA 17:5)
1. liwickmo-issledovatellskiy inst.itut rezinovoy promyshlennosti.

TMEMICHALOV, V.I.; IM'Y"?OV, V.A.
Ba1anced lotation of the elements of force lin a carcaso of a
pressure hose. Kaucb. i rez. 23 no.4,.22-426 Ap'64 OHTIPA 1,7:7)
1. Nauchno-issledovatel'skly institut rezinovoy prcmyshlernosti.

ALYANDIN, N.A.; LEPETOV, V.A.
Dispersion and spread are the basic characteristics of the scattering
of experimental values. Falich. i rez. 23 no.9:32-34 S 164.
(I'!I ? A 17: 11 )
1. Mookovskly tekstIlInyy Institut I Xost-ovskiv In-~Altut tonkoy khi-
micheakoy teklinologil Im. M.V. Ir)monoso%a.

YUROV5'KIY# V.S.; ARKHIPOV, A.M.0, KMENEOVA, A.S.; LEEPETOV, V.A.; T-SYbUK, B.S.
Methodology of acceleratIng Lhe deter-mination of wsirrarit,~!d
storage life of metal-rubber valveo. Kauch.i rez. 23 no.11:
10-13 N 164. (mi RA 18t 4)
1. nauchno-i soled ova tel I sk iy in:'Lifut rezinovoy prcmyshlonnost-i.

-I-E-PETOV, Vaziliy Aleksandro-rich; EJ-'AN, P.T., red.; G ;17 VA , Z. 74 . j,
red.
[Englneering rubber goods] Rezinovye tekhnicheskie izcde-
liia. Izd.2., perer. i do-D. Yo-Ava, Khimiia, 1965. 471 F.
(MIRA .18,6',

TRESHCHAIM, V.I.-, LEPETOV, V.A.
Design and application of hose as hollow elastic jqck.,r;7.
Kauch. i rez. 24 no.11%29-33 165.
1. Nau chno-issledovatel I skiy institut rezincrmy promy3h1omnogti.

LIRPITSKIY, I.A. [deceased); FROLOV. V.V.. kandidat tekhaichookikh nauk,
FOU"VI PLSTXRNLK, B.A., redaktor izdatelletva; SHKRLIKML, S.I.,
takhalchookiy redaktor; T:EXHONOV, A.Ta., takhnicheakiy redaktor
[Modification of metals during welding] Ismeaeals metallov pri
evarke, Pod red. V.T.Vrolova. KoBkva. Goo. uauchno-tekhn. txd-vo
cashinostrolt. lit-ry, 1956. 116 p. Wak 9:7)
1 . (Welding)

VORONOVA, N.A.1- kwid.takhn.nauk; GUTMAN, M,P., inzh.; TROSXU T. Yaja., inzh.
ARMIN, V.D., lnzh.; B.G., inzh.
Hollers made of low-carbon cast iron. Blul.TSMICHM no.17:27-36 157.
(MIRA 11:4)
1,Inatitut chernoy metallurgii AN USSR i Stalinskijv metallurgicheakir
zavod.
(Rolling Mille)

LEPETURNIN, Nikolay-MpAingyi h, ARTEMDV, I.S., red.; POPOV, V.N.,
- i-ekhnred. -- -as-W
(Abolishing labor dayalllez trudodnia. Tambov, Tambovskoe
knithnoe Izd-vo, 1960. 23 P. (MIRA 16%3)
1. Predsedatell kolkhoza imeni Chapayeva Inzhavinakogo rayo-
na (for Lepetukhin).
(Collective farms-Income distribution)
7

A D!p goruyy master; BARDAVELIDZEP 0o; SRATSOVp Yu*B.;
KHOROSHKE'VICH, N*F.
Readers$ letters, Bez(ip#truda v Fmzue 5 no.4:31 Ap 161.
(MIRA 14:3)
1. Starshiy lnzh.uprav:Leni7a Chelyabinskogo okruga Goegortekhnadzora
RSFSR (for Bardavelidw). 2. Nachaltnik uchastka bashennykh kranov
Upravleuiya mekhanizataii No,16 stroitellno-montazhnogo tresta.
No.1 Kiyovskogo aovnarkhoza (for Shatsov).
(Industrial safety)

IZPgffUKHL, I., gornyy master
WOrking vith enthusiasm. Sov.shakht. 10 no.7:10 J'l 161.
(HPA 14:8)
1. Shakhta No.2 imemi Chapayeva Luganskogo sovnarkhoza,
(Donets Basin-Coal mines and inining-Labor productivity)

Lpmummo Z.
The mwters of production. Sov. profsoinsy 17 no.3:IS-19 F 161.
(MIRA 14:2)
1. ProUsdatell poistoyamo deystvyuyshchego, proinodstren go
moveshchaniya Guservokogo khrystalltiogo simoda.
(Gusev-Glaso mam,faoture) (Worke aTmails)

'j',A,, knni. wilik, I A., Inzh., J.p.
" _R I
, r I . 'J~j ~C
, zn. , ~Tr, , 1 .5. ~ , , ?, 'tf. I I
I . 4- , J;; , ~, , T . , : r, 7!
Rev -',) ws rirJ 1. i Fj : i og raphy . i'var . 1)r(A zv - no - ? - 46 Mr 165. (MIRA j8:5)

JOV,11
AUTHOR 6 Lepeyko, I.P. and Prid:,-,ar,, Ya.11. , Engin,~.,er2
TITLE- The Use of Natural Ga,3 for Cutting and 71e.10ing,
PERIODICAL-.~ Svarochnoye proizvodstvo, 195c1, ?,~- ~3, pp ~'L-35
ABS)TRACT; In the Khar1kov electro-mechanical plant imeni 3 ta
the natu.rai gas found in the deposits of
widely used to cut otecls and to vield and z;older non-
ferrous metals and cast iron. The natural ~a.; of *lh4.,;
deposit contains 94c,4 of metharie and 6% of fic-av",
carbons. Its heating power is about 8500 Kcal/rn-71 ar.1
the burning temperature about 2000 0C. The viorkin6
data for the cutting and ooldering wer,: comp-,Ied by
the welding laboratory and the weldIng (lepartment of
the plant. The directions given. by the VNIIAVTO(1,1~N,
(The Utilization of Gases - Substitutes for p-,etyler.,
in OKygen FLame Cutting of M-Aals, Mashgiz
taken as iiiitinl data in ad,usting the diametero o:
the openings of the outer mouth piecca of the flamt-
cutter UR. The dimensions of the injector
Card 1/5 and the inner mouth pieces were set by oxperlmer,'~i,

cl-'OV/1 35 -5 9-8-101124
The Use of Natural Gas for Cutting and Welding of Yetril-
The cutting data were worked out on the hand fl~u.,in cut-
ter UR, the semi-automatic cutter PL-1, and the autc-
matic cutters ASSh-1 and ASI-1. The working data ar-i
the equipment were tested with a pres-5urp which went
up to 10 Atr-,i in the system of the oxygen and 0.5 Atm
in that of the natural gas. As a result of the tedious
tests the diameters for the injectors, the mixer char.-
ber, and the cuter and inner mouth pieces were set as
they are given in table 1 and the drawings 1-6, The
outer mouth piece of the flame cutter for miechanical.
cutting aaa altered - the holes for Preheating were
substituted by one hole which includes the inner mouth
piece. Thus the frequent choking of the jets wao pre-
vented. Before the introduction cf natural tras it
had been necessary to int-errupt the cutt-.*LnC, process
from time to time to clean the jet. During the firs7
month of viorkint, aith natural gras the production norm
dropped by 24%,Obut when the workers had accustomed
themselves to -.he cutting with natural gas the norm
Card 2/5 exceeded that of jaing acetylene, At the present time

'~'OV/135 -5 9 -8-10/2d
The Use of Natural Ga-,- for C'u t " ing and i:, o "E.
natural gas 1~i lzueld for fl~ime-cuttinL mietals of , thick-
ne--G up to 250 mm. When natural gas was introluc-ed
the working places were arranged in a straight lino
u
and equipped with operi~il shelveo tinder whic-h wer'~'
conveyers for the mechanical removal of sla--s, Tn
t~ L
ace tylene--oxy.gen welding the cut is usually interrijpt-
ed and ocorious. In cutting with natural e_-s the Cut
has a clean ourface. This helped to reduce the labor
spent on cleaning, 1-die details f.-om the slaLs after
the cuttin1g. Simultaneously ,,,,ith the introduct-ion oi
~-Ils devicefj wer,
natural gas for the cuttinr, of met,
tested in the plan' to weld and solder non-ferrcus
metals and cast-iron, The use of fla,,:,e cutters wath
the characteristic given above permits to chan:-e com--
pletely to using natural gas in soldering nrid
of metals and In '-,ieLling blow-hole'i J11 Cn.'It-iron,
Acetylene is now ia-i~,,d in the plant only for aut,)rf~,no'..;z
welding of thin-plated steel parts and pipes. At thp
present time burners for soldering with naturril Cac3
Card 3/5 without oxygen tire produced in the plant and intt-c4uc,~d

L;OV/135-59-8-10/24
The.Use of Natural Gas for Cutting and Ybelding of' Yeta13
in the production. The studies carried out in the
field of welding cast-iron with natural gas, which
were conducted in collabor-ition with the welding labor-
atory of the KhTGZ imeni Kirov , led to good results
in regard to the applicability of the parts welded
together with build-up welding. It was found: a) all
spots of the build-up weld can be processed with com-
pletely satisfactory effect, and there is little dif-
ference in the processing of gray cast-iron; b) cast
iron as well as brass can be processed a little bit
better than after welding with acetylene, The authors
come to the following conclusion: In changing to na-
tural gas the existing flame cutter:3 for manual cut-
ting may still be uoed; only the outer mouth pieces
have to be altered, the inner ones remain the same.
The other changes are contained in tables 1 and 2.
The apparatus which was built and applied in the plant
produced satisfactory resul-~s in manual and automatic
cutting of metals, and in gas welding and soldering
Card 4/5 of non-ferrouo metals and Cast-iron. The productivi!,-

SO V/1 _35, 11 0124
"he Use of Natural Gas for Cutting and i'leldin.0 C, Met a! s
of work did riot drop in the change from acetylenc, to
natural gas. The acetylene station could no-a be used
for other purposes in the pro(luction, and it vias po,-,.
sible to employ the workint; personnel in othor pro-
Ceases, The quality of the victal cuts via,; ii:ipr,ove-]
and labor saved in removing the s1fil,o af'ter the cut.-
ting. It is obvious that it is practical to introduce
natural gas in 8as-welding and cuttinj~ rfocesses where
there is not centralizt?d supply of acetylene, There
are 3 tables, 8 diagram_-, and 2 photo6rnphs.
ASSOCIATION: Khar1kovIelektromekhanicheokiy zavod ~11'alina
(Kharlkov Electro-Nechanical Plant, imeni Stalin
Card 5/5

LFPFYKO., 1.11. , inzh.
Efficiency of using certain welding processeo. Svar. proizv. no.7:
30-31 JI 164. (MI-PLA IF-: -1)
1. Kharlkovskiy elektromekhanicheskiy zavod.

LFPEYKO, I.P., inzh.; OLEYNIK, L.U., kand.ekonomicheskikh nauk
Increasing engineering efficiency of units bZ welding.
Hashinostroenie no-4:62-64 Jl-Ag 162. (MIRA 15:9)
1. Kharlkovskiy elektromakhanichaskiy zavod (for Lepeyko).
2. Kharlkovskiy politekhaicheakiy institut (for Oleynik).
(Electric welding) (144chinery-Construction)

EVIt (M)LEWA (d)/EIVP (v)
/T/E TL i?
APS027601 SOURCE CODE: UR/0135/65/000/011/0020/0022
AUTHORi LmXkg. I. P. ( ngLneer); ISIravolkov, S. M. (Technician)
_7~Y~ 5-'
ORG: KhArIkov Electric MachinerZ Plant (Kharlkovokly elektromekhanicheakiy zavod)
VY,
TITLE: Use of silverless solder to join parts of electric machinery and equipment
SOURCE: Svarochnoy* proizvodstvo, no. 11, 1965, 20-22
TOPIC TAGS; solder, antimony, metal soldering, electric equipment / MFSu 92-6-2
silverless solder YI/I 55r
ABSTRACTs Considering the high cost and scarcity of silver solders, the Kharlkov
Electric Hachinery Plant has been investigating the possibilities for replacing them
with silverless solders displaying roughly the same properties. In this connection,
the authors describe the experimental Investigation of varieties of MpSu 92-6-2 soldev
which consist: ch4fly of copper, phoophorum and antimony and costs only no-fourth
% 14f
as much as PS 15 silver solder, sinco the literature on the HPSu 92-6-2 solder is
very scanty. It was tried out on copper and brass plates measuring 2x25 ma in area
nd 100-110 = in length. The soldering was carried out with the aid of natural gas,
:n using a flux consisting of 50% XF + 50% H3BO , and was followed by tensile, shear
and bending tests of the soldered copper and briss specimens. along with similar
comparative tests of specimens joined with standard silver solder. Since brazed joints
1/2 M)Cs 621.791.35

1 9678--66
ACC NRs AP5027601
in electric machines and devices are exposed to prolongedcurrent loads, appropriate
electric tests of the brazed joints were carried out by the method of comparative
evaluation of voltage drop on specimens of 2x25 ma copper busbars. The specimens were
heated with 200-a direct current. findings; the resistance of the brazed specimens
and base material is the same, amounting to 0.000023 ohm. Metallographic examination
showed that the use of antimony in the MPSu solder'is advantageous, since, among
other things, it improves pore penetration, reduces the melting point, reduces the
solubility of copper in the solder, and does not adversely affect microhardness.
Accordingly, the 1(hartkov Plant began to organize the production of its own supply
of MPSu 92-6-2 solder (overage compositiont Cu 90.8%, P 6.65%. Sb 1.45%, Sa 0.1%,
Zn 0.1%) in the form of# mostly, rods 400 mm long with a diameter of 15-16 mm. Cur-
rently MYSu solder is used in liou of PSr 15 silver solder to join parts of electric
motors, current-conducting busbars, and other products. A* a result of this substi-
tution, the KharIkov Plant saves more than 10,000 rubles per year. Orig. art. has:
6 tables.
SUB CWSI 09, 116 13/ SUBM DATE: none/ -ORIG RU: 000/ OTH RM 000

inzb.; OIMNIK, L. U., kand. skonom. nauk
goonomic efficiency of uning welded BtructureB. Svar. proisy.
no.lOt22-23 0 162. (MIRA 15:10)
1. Kharl)covBkiy e1ektr=*kb&nicheBkiy zavod (for LeMko).
2. Khartkovakiy politakhnicheskiy institut (for Olayuik).
(Maohinery-Welding)

LEFEYK01j.p..
Timely task. Artom. avar. 16 no.6t65-86 Jo 16". (MIRA 16:7)
1. Khatlkovskiy elektromekhanichoskly zavrd.
(Gas weldiug and cutting)

-IEPEYYIOI I.P., irizh.
Some examples of the economy of vaterlals lit the manufac-turj C,"
welded structures. Sver. proizv. no.8:27-29 Ag 164.
(mTPA 1,1:9)
1. Kharikovskiy elekti-omekhanicheekly zav.-.)d.

BEYPLY, S,G. j JL~~Ijk. - --
Undergrc,und water in the Altai. Trudy Trarap.-energoinst, 51b.
otd. AN SSSR no.13:117-128 t61. (HIRA 15:6)
(A.Itai Territory-Wat9r, Underground)

21745

,40
)8(
.)51

110S P/043/61/000/001/001/001

A223/A126
AUTHORs Lepiarz, L., Master, and Hazim, H., Engineer
TITLE: Steel-vinidur tubes
PERIODICALi Wiadomos/ci Hutnicze, no* 1, 1961, 15 - 18
TEXTt The rapid development of the Polish chemical industry calls
for an increased production of tubes resistant to chemicals. The acid-proof
austenitic tubes produced in Poland cover only part of the country's needs
and a considerable amount has to be imported. The Sosnowiec Huta (Metallur-
gical Plant) started the production of steel tubes with "vinidur" lining.
These tubes are produced by cold rolling through simultaneous reduction of
the steel and vinidur tube diameter which makes for a close adhesion of met-
al and synthetic material. Steel-vinidur tubes can be used instead of chro-
mium-nickel or non-ferrous metal tubes, and are 5 - 6 times cheaper than
the conventional acid-proof tubes. The production program includes steel-
vinidur tubes with an external diametar ranging from 10 to 110 mm. The
steel wall of the tube is made from low-carbon steel and makes the steel
vinidur tubes suitable for underground and surface pipelines. Vinidur tubes
Card 1/3

21745
Steel-vinidur tubes
P/04 61/000/001/001/001
A223YA126
with outer steel tube can withstand temperatures from -10 to +60 and in some
cases even to +1000C, while the ordinary vinidur tube can resist tempera-
tures from -5 to +5000- Experiments showed that a temperature of 1000C does
not cause a separation of the vinidur lining from the steel tube. I'Vinidur".
a thermoplastic substance derived from polyvinyl chloride is resistant to
certain acid and alkaline solutions, acid salts, mineral oils, plant oils
and organic compounds. Steel-vinidur tubes can be subjected to bending like
any other tubes, without causing a separation of the "vinidur" lining from
the steel tube. The bending can be carried out by a bending machine or by
bending equipment with grooved rolls. Bending is done by the conventional
method of filling the tube with sand preheated to a temperature of 130 -
1600C and consisting of 1--mm granules. Pipelines consisting of steel-vinklur
tubes may have permanent or detachable connections. Permanent connections,
used mainly for low pressures, can be either threaded joints or welded
joints. Welding is carried out by an air jet of 210 to 2300C with a vinidur
rod having a diameter of 1/3 or 1/4 of the thickness of the vinidur tube.
Detachable connections are flanged joints with or without reinforcement,
Both these connections are made by removing a strip of steel at the ends to
Card 2/3

217h5
P/ 0431611000100110011001
Steel-vinidur tubeo A223/A126
be connected, forming a flange from the ends of the vinidur tube and insert-
ing an annular vinidur, Iligplit" or rubber j;aukot. The reinforced type of
these flanged joints differs from the other by a vinidur rini;, with a thick-
ness equal to the thickness of the vinidur tube wall, welded to the vinidur
flange, which insures greater resistance to high pressures. Vinidur can be
welded by hot air jet, by heat from friction, by contact with a hot object
and by high-frequency current. Welding by hot air proved most practical.
The joints are tested for tightness by a spark inductor. In practice for
each mm of tube-wall thickness a tension of 15,000 to 20,000 v is used.
Steel-vinidur tubes should have a smooth inner and outer surface. The R35
steel with tensile strength Rr = min- 38 kglmm2 and ductile strength alo
min. el. and vinidur with tensile strength Rr - min. 400 kg/CM2 and ductile
strengtb aA0 = min. 5ro are used in the manufacture of steel-vinidur tubes.
Steel-vini ur tubes can resist nressure tests similar to steel tubes and ir
accordance with the Pli-53/H-74220. On the basis of tests, permanent connec-
tions should resist a pressure of cold water of 15 kg/cm2 and the detachable
ones a pressure of 40 kg/cm2. Steel-vinidur tubes are a new Polish product
manufactured by the Sosnowiec Metallurpiral PlAnt. Tests proved that these
tubes can successfully replace in many cases the acid-proof tubes. There
are 4 tables, 6 figures and 5 Soviet-bloc references.
Card 3/3

LEPIC, Arl
Inventor and Improver Mavement in 1962. Doprava no.4:310-311 163.

FRACZEKp Kaximiers; LEPICH, Teresa; POLACZEK, Jerzy
C=arone-indeme resins. Pt.l. Koks 8 no.3194-100 MY-JO163.
1, Instytut Ciezkiej Syntezy Organicznej, Warszawa*
'k

Ya.L.
.--Ii I
Rlectric-cantnct brindiV, of cutti", tools. Trud7 -'NTC MVTII
no.3:5-~-66 '5?. 0'41~-?A !.-1: 9)
(Cutting too!s) (Metal cutting, Blectric)

LEPIESZKIEWICZY Zygmimt, mgr inz.; S)IIORADZKI, Jerzy., mgr inz.
Certain control and signaling installations applied to weirs and
chamber looks. Gosp. wqdna 22 no.10:433-436 0 162.
1. Hydroprojekt, Warszawa.
N

VIVO
tWerminAlorl ur (fie opffiffims SM06ficial
bf tvinifonocri.W
UtrisvKo.
fkballeC4., if Vi, ! 1, 1
Ir Ito nxthod l:c-vr;bk;d is cbinwd to IV. Simpkr find
rwiv =uratc thin iirnflar onca. A nurywrical
cxarrpl,: Ilhntralci tilt nlc!hz).j, A, KAKI SHAD

LE-PIESUNSKA, 0.
"*,lays of Longevity." p. 160 (ProbI r
ff Vol, 9 no. 3 1953 Warszawa.)
Vol. 3, no. 6
SO: Monthly Ust or -I-Ast European kcessions. /Library of Congress, Jime 1954, Uncl.

MELIKUOVITSKIYO I. M.1 AKHRAT07, P. G.; LEPIGOVAI E. L.
Magnetic properties of r7ckB in the eastern part of Central Asia.
Uzb. geol. shur. 6 no-5:33-85 '62. (KIRA 15:10)
1. Sradneasiatakiy nauch-no-ionleaovatellokiy institut geologii
i mineral'nogo sy-rlyal Tashkant.
(Soviet Central Aala-Rocka-Magnatic properties)

k-
I.M.; ?x-inimalls UTIGOVA, C-I
Phyalcal prcV-tltIL-s r-f PrO-)t9f)z')l:7 rr,-,M) In 0,-
Tlon Ormn. Izv. Al .;Pr. guA. 21 nc). 2144-1~4 -- 164.
(millA 17, P)
1. Srodnoaziatgkii naiichno-lfl9lOdoVnLO1'9kly InslAWt goologli
I mincrallnogo syrlya, Taulikent.

ExDerimental study of conbingd imzuri!zsition againat stauhylococcal
infections) tataxius$ typ'noid and paratyphoid B. Flevort ilo.l. Zhur.
mikroblol., epid. J Imnun, 40 nr,.II:IIP,-122 N 163,
(,'.!IRA 17:32)
1, Iz Instituta epldo-mLologlij I m1kroblolok.-J.1 imeni GamaleL AMN SESSR.

L%:PIK, D.K.
I
Experimental study of orbined i=ani7atlon agalLs*-
infections, tetanus, typhoid fever and paratyphoid B. Report 1;0.2:
Resistance of iru-,unized animals to corresponding bacter.-al c-altures
and their toxins. Zhur. mikrobiol.; epid. i inran. 41. nD.6:125-130
je 164. 1F:1)
1. Institut epidemiologii i mikrobiologii imeni GaTalei A1,21 SSSR.

AUTHOR: Lepik, Yu.
42749
S/854/61/000/102/002/004
B167/B1 04
TITLE: Analysis of the poatcritical state of elastoplastic beams
SOURCE: Tartu. Universitet. Uchenyye zapieki. no. 102. 1961. Trudy
po matematike i mekhanike. no. 2. 342-350
TEXT: The equilibrium problem in the D03tcritical state for freely
supported, straight, incompressible bars of length 1, with rectangular cross
section, and linear strengthening is dealt with by a method of Engesser-
Kdrmz~n and solved by the perturbation method. If the maximum deflection f
is so small that no regions of plastic deformation arise in the bar then the
axial compressive force at the ends of the bar has the approximate value
2 2
P - P !I + 7L + (3-7)
0 L
The distribution of the regions of active and passive deformations remains
unchanged in the transition from the critical to the postcritical state. A
deper.dence analogous to (3-7) is valid also for other supports. Since
secondary plaszic caformatior. zakes place when deflection is relatively..
Card 1/2

S/854/62/000/102/002/004
Analysis of the postoritical ... B1b7/B1O4
small, the applicability of (3-7) is limited considerably. it is shown that
deviation from the rectangular shape of the cross section has only little
influence on the instant at which the first plastic deformation appears.
States without regions of pla3tic deformation are possible only if tho
deflection is less than the bar cross section, i.e. when the second term in
(3.7) can be neglected: P - Po - const. Since the resistance to buckling
decreases rapidly after secondary plas*.ic deformation appears, the
buckling load according to Engesser-Kdrmjin is also the upper load limit
of the bar.
ASSOCIATION: Xafedra teoreZichookoy mekhaniki fDopartmont of Theoretical
Mechanics)
SUBMITTED: March 9, 1960
Card 2/2

B167h3104
AUT Lepik, Yu., and Lukht, L.
TITLE: Large deflections of a flexible, elaszoplastic circular
disk freely supported at the edge
60uici~: Tartu. ~niversitat.' Uchanyye zapisici. no. 102- 19061.
Trudy po imawiri~,tiKe i meKhan~ke. no. 2. 377-3a4
'C;-, AT :A study is made of the strong deflection in the direction of the C-I
sy;.-..-.ietry axis of an incompressible elastoplastic circular disk of r-dius
a and thickness h zith linear szrengthening in the poszcritical range.
The edge of the plate is nini-ed and freely movable in the plane of the
plate. The problem is soived with the aid*of Lagrange's variational
equation
a r lo W I re'r
': (1 2 12 2
2 -1 2
'0 2Zh
with the following boundary conditions: for r 0; ~: . -
21 '~I - "29
0. dw/dr the quoti~:ntz, u/r ana aw/dr are bounded; for r - as
Card 1/5

Large deflections of a bibVB104
w - 0, T 0. '4he zolution is oougat in the form
IV 1 2 1 11 2 -5 4
*1 + .21, "r ~ 5" ); w" w 0(1 h : + 11
with the four coefficit;nts ~;I 021 inter_-vi;andent because of the Ir
boundary con,ditions:
16 2
5~ +7~;
2- (71) wo
~:ence, three parazae-,.rl~ ~rL~ Varlei. The zstrisk dQnot,~s the transformution
into dimenzionleos quLtrities:
*0 4 4
au/:1 .1;- ?.Vh, q'
Y u e p i.-c I s m v t i. o a 0.; v cj I i. plastnox', za predelom
uprugosLi - _Equiiibrium 3f clas,.ic beyona ~he elastic limit,
- - matem. i Iv57, 21, 65`-cj42) wzu usea to solve the
Pri K 1 0
PrOOiOM. ;;.!hC ~I-e3i~,rIL-tiOr.6 Lfe a.16OG -.aKcn from tais ;caper. The nu~.Crical
computations vier;-, madc for ar, idual pluLitic maturial at the
,yehislitellnyy tsentr 'i`iArtL;3/370 &0s. universiteta (Computer Cen-.er of
Tartu University) with. 'rhe electronic computer. ',-'he progTamming was
Card 2/5

S/854/61/000/102/003/004
Large deflections of a flexible,... B187/B104
made by A. Laumets. Values calculated for comparison (p - 2; 4 - 1)
showed that the mechanical properties of the disk depend on the
strengthening to only a smail degree. The following initial values of the
parameter p - a 21a 1h2 characterizing the flexibility were taken into
account:. V a 0.2; 2; 5. The corresponding numerical values for
1 10 2 .2
X 3 r 1 ( 0) , yo . 2aL h,
W * ( Q QdQ, T* a T
0 C1 , C21 2 Itq .00. 0 4 0 4
0 w Eh Eh
0
and the characterization of the deformation in'tensity e. by n - (li)max
1 1G
at the point of maximum load are listed in'a table. The regions of
plastic deformation for 4 - 2 in the disk cross section are shown in a
schematical drawing (Fig. 1). The values found experimentally and %hose
.published by 11. 1. Rasskazov (K vobrosu o rabote krugloy plas%niki za
predelom uprugosti - Operation of a circular disk beyond the elastic
limit, Tr. Mosk. in-ta khim. mashinostroyenniya, 1957, 14, 55-79) and
R. Haythorathwaite, E. Onat (The load-carrying capacity of initially flat
Card 3/5

S/854/61/ooo/102/005/004
Large deflections of a flexible, B187/B104
circular steel plates under reservad loading, J. Aeronaut. Sci., 1955, 22,
667-869; The load-carrying capacity of circular pla;es at large deflection,
J. Appl. Mech., 1956, 211, 49-67) are co--pared w1ta the calculated values.
0 exp exp exp
~Rasskazov 0-5
'plate no. b. 1
A - 1, 0.212
1.5
Q1
,Rasskazov 0.5
,plate no. 3. 1
1, 1.46 1-5

Q 1
2
Haythornth wai-.e 0-5
Onat 1
0.46 1 .4
Q* 0.1 1.77
0.124 0.109 13 - 6~1
0.144 0.132 9. IV*
0.179 0.174 2 . %1'4

0.347 0.26 23.9~
0 712 0-59 20-N,
1:020 1.10
1.310 1.43
0.240 1 0 17 4 1 . 27-4
0.303 0:206 16-5%
0-355 -0-34 4.4%
0.415 0.41 0.7%

S/854/61/OGO/102/GG5/OC)4
Large deflectiom of a flexible, Bla7/3104
The deviations of the loading parameter q decreasing with increasing wIt
0
are explained by the presupposition of incompressibility. There are
1 figure and 2 tables.
ASSOCIATION: Kafedra tooreticheakoy mekhaniki ~Department of Theoretical
Wechanics)
SUB14ITTED: March 30, 1960
Fig. I
Card 5/5

A
CC N IM: AR40144Z7
'ESSI01 8/0124/64/000/ool/VO30tro3o
SOURCE: RZh. MSekhnnika, Abs. IV232
AUTHOR: Lepik, Yu
TITLE: Carrier capability of circular laminas subjected to neutron irradiations
CITED SOURCE: Uch. zap. Tartusk. un-ta, vy*p. 129, 1962, 482-486
TOPIC TAGS: . irradiated lamina, carrier capability, radiation material effects
radiation and plasticity
TRANSIATION: The author determines the carrier capability of circular, freely
supported lamina subjected to neutron irradiation in a direction perpendicular to
its plane. The material is assumed to be an ideally plastic solid. The applied
load is distributed evenly along the circle. The radiation interaction results in
an increase in the fluidity limit IT S.
The irradiation dose penetrating to a depth z Is given by the expression
N = Noe- A((hl2 + z), where /Vis a material constant. If one knows the experiment-
al dependence of 6,ZN), the problem reduces to the calculation of the carrier
properties of the nonuniform lamina. The author presents an example in which the
Card 1/2

ACCESSION NR: AR4UI4427
I carrier capability was augmented by 70% relative to the nonirradiated lamina.
V. P. Tarauzh.
DATE ACQ: l8Feb64 SUB CODE: AP.. NS EITCL: 00
Card 2/2

jh~L
'Leo Yu.R. Twit remarks on the theory of stability of
WTiiVeYVA4 the elastic Limit, taking account of the con%-,
-Mr -Akad. Nauk SSSR. Prikl.:
preigb* of the e9Z
MaL Meh. 14, 553-55 7 (19SO). (Russian)
A. A. 11yushin has discussed the problem for fncompres-~~
-Dias0c:
aiWe materials In, terms of the theory of small elastic I
deforTnatiom The prerent paper discusses the validity ol
Ilyushin's results for compressible materia!s. it is shown
that the solution uwler the assumption of incompressibility
approachft the tNe solution as the difference between the:
yield stress and the buckling stress increases. On the other
htind, the solution b1sed on the assumption of small-plastic:
deformation can be tjftd only so loog as the bu~klin stress
does not exceed the yield stress by more than I per cent:
The wond ions
- pa;t, of the paper. formulates four conditt.
under Which,the "lative thickness of-the plaitic zone re-
i. maW constant in wnpressible materials, It is shown that
the assumption of it, compressibility leads to an overestimate
of the relative thickness. Ir Jr. Am of.
Yathav&tiftl R41T-4 Vol. 13

)JI). Ll Ik. A44114,Wdl 1*11talkS " the tPlinJ14,61
Igo= J the Iva* tA staLdsly W pki". beyond the yo*14 p"I wo
jj,p.fti.o, V,.f IJ,J.A, 15, 1, Ill, 110, Jai# t'rl, IW.I.
Aull-r Owl I#K' -4 thr mlmilw,vt j
l4e,ow Woes Ow ham td oW-0114Y. a- r4oll-lotil-I
G"NAP 114-1111w.1., I'M%
*,Let

USSR/Mathematics - Plates, Stability Sep/Oat 51
"Loss of Stability in a P3Ate of Compressible
Material in Area of Flow," Yu. R. Lepik, Tartu
state U
"Prik Matem. i Mekh" Vol XV, No 5, pp 629-635
This problem is treated under assumptions that:
(1) state of tension of late before lose of
stability is uniform; V variations ST1,'ST2,
SS of forces equal zero at loss of elasticity.
In this case material of plate is mostly deformed
plastically. . Obtained results facilitate
193T58
USSR/mathematics - Plates, Stability Sep /Oct 53
(Contd)
ev,aluation of compressibility effect of material
on critical elasticity of plate. Submitted 6 jan
51.
193T58

7,
U S S R
jalk- YO. P, Stallully of a rawa~&
or % #I&S*:CUstlC
SiOssodlaonedUaction. Inten.
8b. 14, 161-164 (1954). (Russian)
The problem of de title Is treated for simply-supported
plates. The analysis only differs from that for elastic plates
tntough the use of plastic moduli. Numerical results for a
f range of plate aspect ratios are given for the caw when the
applied erA load vatice linearly from zero across the plate
wWth. The" results are computed for plate material with
sodfied values of the plastic moduli. The results need
careful Interpreatioa In view of recent work [e.g. H. G.
Hopkins, Quart. Appl. Math. 11, 185-200 (1953); MR 14,
930; E. T. Onat and D. C. Drucker, J. Acro. Sci. 20,181-186
(1953); MR 14,929] illuminating the complex behaviour I
lastic Mtems at ln~ttabllity. 11. G. Hopkixi._y

---- --- ---
667 sl-nv cis 16t. V-ilf.b ,f al V.,tW .,f 11'.
A I.-s of StAolds it, U,~ sf~k4 Alelle ra" k
C'p t%, (,,I lk, 4'~ to "-f 1--!iw~ 4,41, i, o, i-I it ~lt-,I, '.4

AUTHOR: lepik, Yu.R. (Tartu) 24-8-2/34
TITIB: A possibility of solving the problem of the stability of
an elastic-plaBtic lamina in its exact formulation. (Odna
vozmozhnost resheniya zadachi ob ustoychivostl uprugo-
plasticheskikh plastinok v tochnoy postanovke)
PERIODICAL: "Izvestiva Akademii Nauk SSSR. Otdelen:be Tekhnichesk-
ilff-Nauk- "_ (Bulletin of the Academy aC Sciences USSR.
TTe__eMTc-ai Sciences Section.) No.8, pp. 13-19A (U.S.S.R.)
ABSTRACT: As is known, the problem of the stability of al'nlillastic-
plastic lamina in exact and approximate formulation was
first fommlated mathematically and solved by A.A.Ilyushin.
Ilyushin describes the approximate solution of the problem
as that for which chan 0 in the tangential forces on the
loss of stability are rdentically zero. This method of
solution has been developed in sufficient detail and is
already beginning to be introduced in engineering practice.
There is, in addition, undoubted interest in the search for
exact solutionB. These solutions are sigaificant even if
only to evaluate the degree of accuracy of the approximate
solution, but solution of problems on the stability of an
elastic-plastic lamina is attended by considerable mathe-
Card 1/3 matical difficulties as a result of which an exact solution

24-8-2/34
A possibility of solving the problem of the stability of
an elastic-plaDtic lamina in its exact formulation.
(Cont.)
has been obtained only for certain of the simpler cases.
These difficulties arise fundamentally because the oatis-
fying of the continuity conditions at the boundary of an
elastic-plastic and purely plastic domain leads, in the
simplest cases, to complicated equations. Moreover, this
boundary is initially unknown and is defined only in the
course of the solution. In the present paper, it is shown'
thatt by starting from flow theory, it is possible to
constract a variational equation of Galerkin's type for
which all the continuity conditions on the boundary of the
elastic-plastic and purely plastic domain are satisfied
automatically. This makes it possible to solve any problem
on the stability of an elastic-plastic lamina in exact
formulation. It is proved that for the case of sufficiently
small plastic deformations (i.e. when w = 1 - EI/E C~:O),
results found on the basis of deformation theory and flow
theory coincide. The problem of the stability of a contin-
uous,circular lamina is investigated in greater detail. It
Card 2/3 is indicated that the solution given by Tolokonnikov, L.A.(2)

01-8-2/34
A possibility of solving the problem of the stability of an
10
elastic-plastic lamina in its exact fo3mmlation.
(Cont.)
appears to be inaccurate. There are 2 tables and 2 Slavic
references.
SUBMITTED: April 20, 1957.
AVAIIABLE: Libmry of Congress
Card 3/3

AUTHCH LEPIK M PA - 2212
ff~
TITLE O
tho rium of Elastically Plastic Rods (0 ravnovesii upr%go
-plastichesikikh sterzhney).
PERIODICAL Prikladnaia Matematika I Mokhanika,1957,Vol 21,Nr 1,pp 101-108 (U.S.S.R.)
Received 3/1957 Reviewed 5/1957
ABSTRACT 'The present work shown that there are eases in which the application of
the solution'by A.PFLUEWM (Ingeniour Archivx Vol XX, Nr 5, 1952) for
the determination of deflection of a rod lowis to considerable errors.
The basic equation for the equilibrium of a rod. A straight rod which
has been compressed by a longitudinal force To-investigated here, the
crone section of which contains two symetry axes. X here denotes the
central longitudinal axis of the rod, and x and y are assumed to be the
symmetric axes of the cross section. On losing stability the rod is as-
sumed to bond through in the xz-plane. lbo author here confines himself
to amall, deflections. The above mentionoA basic equation is derived and
written down. It is not possible for the whole rod to deform elastically
and plastically.
Next, the relative thickness of the plastic layer is do ermined. The
basic equation of equilibrium can be Integrated J r the distribution or
the zones of the active plastic deformations are known. The following
conclusion is drawn. An equilibrium without the existence of domains
with purely plastic deformations is impossible.
A The limits of applicability of the solution discussed here. All formula
are derived here on the assumption that no zone of sac y plastic do-
C; Card 1/2 formations occurs, I.e. that the material of the rod within the zone of

P I & I hu, 61,
AUTHORt LEPIK,Yu.R. (Tartu) 110-5-20/~o
TITLEs "-Un--the ~Stability of an Elasto-Plantic Rectan(,-ular Plate
Which is Pressed in one Direction (0b ustoychivosti uprugo-
plasticheskoy pryamougollnoy plastinki, szhatoy v odnom na-
pravlenii)
PERIODICAL: Prikladnaya Mat. i Mckh.,1957,Vol.21,Nr 5,pp.722-724 (USSR)
ABSTRACTs The stability of elasto-plantic plates in general is calcu-
lated according to an approximative method Civen by
Illyushin [Ref.1] . In order to determine the error of this
approximative method it is important to have more exact so-
lutions. This problem has been solved by the author in a pre-
ceding paper. The present inveatiCation continues the pre-
vioua papers by the investigation of tro special cases of
the stability of rectangular plates. The author considers
rectangular plates which are stressed in pressure on tro oppo-
site sides by forces equally distributed on the boundaries.
He restricts himself to the case of small deviations of the
plate from the quadratic form so that the loss of stability
by a buckling of the plate takes place in the form of a half-
wave. The material of the plate is asiumed to be incompres-
Card 112 sible. Galerkin's variational equations are applied for the
calculation. The Calerkin enuations are solved for the two

On the Stability of an Elasto-Plastic, Rectangular Plate 40-5-20/20
Which is Pressed in one Direction
caaea of a totally fixed plate and of a completely freely
supported plate. The calculation shows that in the case of
the freely resting plate the error of the approximative for-
mula is smaller than in the case of the fixed plate. On the
basia of the obtained results it can be stated that
Illyushinla method gives an exactness rhich is completely
sufficient for practiaal purposes.
There are no figures, no tables, and 2 E~lavic references.
SUBMITTEDt March 5, 1957
AVAILA.BLEs Library of Congress
Card 2/2

AUTHORt Tu.ijl. (Tartu) ~! C .. 2,.- C.- - 31, 1 ~,
TITM Oj~ the-L1qU-1T1bYiun of Flexible riates Teyond the Limit of
Elasticity 10 ravnovesii gibkikh plastinok za predf-lon upru-
If 1, o s t i )
PERIODICALs Prikladnaya "ekhanika, 1957, '.CI 21- Nr 67
PP
ABSTRACTs In a paper p,ablished two years ago the author '1,-,f 1 in-
vestigated the problem of the equilibr:,.una of flexible, elaz;to-
plastic plates and set up the basic equations. He
1y developed a Cenera'. riethod for the !iolution of the basic
Pquations which is similar to Illy~ushin's methol. In pre-
sent paper the former orders of thou[,-hts are continued. Ferri-i-
las for determining auxiliary functiona are derived, and as
oxamples of application of the Coneral theory two problemg of
the equilibrium of circular plates are calculated. At first
the author considers ,;r(2at deflections of a circ,_ilar plate
under the effect of a transverse stress and then lonCizudinal
and transverse bendin,-s cf a circular plate. The calculations
carried out on the quickly viorl-in,, electronic computer of the
type "~;trela" in the computing center of the University 31!os-
Card 112

On the Equilibrium of Flexible Plates Df-ycnd the 4, 0 - 2 1 -7, / 1
Limit of Elasticity
cow show a -ood conver,-en,:;e of the approximative solutions
0
obtained according to the f,,iven methcd. There are 11 fi~-itres
and 5 references, 3 of which are Soviet, I Gernan, ani
I *,-n;,-lish.
STIBMITTEDs June 17, 1957
AVAILABLEt Library of Conrrress
1. Elasticity-Theor7
Card 2/2

SOV/ 124-58-8-9149 D
T ranslation f rom: Refe rativnyy zhu rnal, Mekhanika, 19 58, Nr 8, p 120 (USSR)
AUTHOR: Lepik, Yu.R.
TITLE: Some Aspects of the Equilibrium of Elastic-plastic Plates and
Bars (Nekotoryyc voprosy ravnovosiya uprugo-plasticheskikh
plastinok i sterzhn.-2y)
ABSTRACT: Bibliographic entry on the author's dissertation for the de-
gree of Doctor of Physical and Mathematical Sciences, pre-
sented to the MGU (Moscow State University), Tartu, 1958
ASSOCIATION: MGU (Moscow State University), Tartu
Card 1/1

AUTHOR: Lepik, Yu. R. (Tartu) SOV/179-59-3-26/45
TITLE: Determination of Residual Deflection and Stresses on
Rupture of a Flexible Elasto-plastic Plate (Opredeleniye
ostatochnogo progiba i ostatoclinykh u!siliy pri
razgruzhenii gibkikh uprugo-plasticheskillch plastinok)
PERIODICAL: Izvestiya Akademii nauk SSSR, Otde.Leniye teklinicheskikh
nauk, Mekhanika i mashinostroyeniye, 1959, Nr 3,
PP 154-157 (USSR)
ABSTRACT: The paper is a continuation of previous work (Refsl and 3).
The problem of equilibrium of a flexible plate is taken as
solved (e.g. as in Ref 1) so that the stresses Xx ....
the strains e xx ... , the stress resultants Tj .... and
the moments Ml ... are known. At rupture, these quantities
take values X0 -., e 0 ... etc. and new variables
are introduced x X., = Xxx - X0 .... el = e - e0 etc-
x x x Xx xx xx
The equilibrium equations are written in terms of the
primed variables, nnd a differential equation for residual
deflection is obtnined and solved by a variationnl method,
Card 1/2 allowance being made for secondary plastic deformation.

SOV/179-59-3-26/115
Determination of Residual Deflection and Stresses on Rupture of a
, Flexible Elasto-plastic Plate
As a particular example, the case of a circular plate with
clamped edges subjected to a uniformly distributed load
is discussed, and a numerical example is given.
There are 3 Soviet references.
SUBMITTED: January 26, 1958
Card 2/2

S/179/60/000/02/011/032
E031/E213
AUTHOR: Lepik Yu. R. (Tartu)
1 24
TITLE: '-TFe 'Plastic Flow of Flexible Circular Plates Made From
Rigid Plastic Material
PERIODICAL: Izvestiya Akademii nauk SSSR, Otdeleniye tekhnicheskikh
nauk Mekhanika i mashinostroyeniye, 1960, Nr 2,
pp 78-87 (USSR)
ABSTRACT: The problem of the load-carrying capabilities of circular
plates under symmetrical loading has been considered by
various authors (Refs 1 to 4) for the case of small deflec-
tions, A solution has been attempted for large deflections
(Ref 6) in which the equations of statics were not satisfied.
In order to arrive at a more realistic value of the limiting
load it is necessary to make the statically permissible
stress field conform with the kinematically possible
velocity field. Consider a circular plate subjected to a
symmetrical transverse load, with a freely supported edge,
and assume that the plate, in deforming, retains its axial
symmetry. The material is supposed to be incompressible
and not hardened. The flow conditions of Tresk-St. Venant
are assumed. The pla--~e is assumed to be so thin that
Card 1/3 the Kirchhoff hypothesis of straight normals is

B/179/6CVOOO/02/011/032
E03l/E2.-,-3
The Plastic Flow of Flexible Circular Plates Made From Rigid
Plastic Material
applicable. Small deformations, but moderate deflections
are considered. Expressions for the tangential forces
and moments are obtained from the expression for
the magnitude of the plastic deformation of unit area
of the mean surfaceV and the radial force and radial
bending moment are determined from the equations of
equilibrium. By applying continuity conditions on
these quantities at the edge of the plate and the
boundL,,ry of the circular region over which the load is
applied, one arrives at an equation from which the load
can be calculated aa a function of the deflection at
the centre of the plate. It is frequently necessary
to assume that the Btressed state on bcth sides of the
surface of discontinuity is homogeneous or varies
linearly with 'the thickness, but these assumptions are
not required in this paper. Two special cases are
considered. The first is a freely supported plate
with a fixed boundELry. An expression is given for the
Card 2/3 relative deflection at the centre of the plate and

S/179/60/000/02/011/032
E031/E213
The Plastic Flow of Flexible Circular Plates Made From Rigid
Plastic Material
the load parameter can be determined as a function of
this deflection. The second example is that of a freely
supported plate for which the points of the edge can
move freely. The problem is similar to the previous one
and some of the details of the solution are omitted. In
both cases the solution is derived in stages corresponding
to increasing load. It has been assumed that the surface
of discontinuity has been defined in accordance with the
theory of plasticity, but it might have b-.en determined
by consideration of the theory of deformations. By
solving the problems considered on both theories it is
possible to evaluate the effect of compowid loading.
To illustrate this the case of a hinge-supported plate
with an edge which car.. move freely is coni3idered.
Theoretical results are compared with experimental ones.
No conclusions are drawn. There are 5 figures and 11
references, 8 ofwhich are Soviet and 3 English.
SUBMITTED: November 20, 1959
Card 3/3