SCIENTIFIC ABSTRACT RABOTNOV, YU. N. - RABOTOVA, I. L.

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• Document Creation Date: January 3, 2017
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• Sequence Number: 18
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

RABOTNOV, YU. N.
7538 ILITUSHTN, A. A., RABOTMOV, Yu. N INZHEKERNrY. SWRKIK. (OTV. MM.
A. A. IVYWHIN, n. N. RAMONT".M., IZD. V0 AnD. NAUCH &WR 1954
26 sm. (AKAD. KAUK. SSSR. OTD. KM TEKM. NAUK. IN. T HUMIXII. T. ~O
184 S. S. ILL. 2.500 EKZ. 90 C 80 K. -BIBLIOGR: V KONTSE STATET.
(55-943 ZH)
SO: KNIZHNAYA LEMPIS* VOL. 7, 19550

USSR/Engineering - Machine Study
FD-1456
Card 1/1 Pub. 41-10/17
Author Rabotnov, Yu. N., Moscow
Title I'mallf-~~ilastid*d'eformations as a problem of mechanics
Periodical Izv. AN SSSR. Otd. tekh..nauk 7, 97-104
Abstract For the purpose of clarifying questions linked~with the external aspect
of the occurrence of plastic deformation in metals at normal temperature
(temperatire at which,life,of organisms is possible) and at relatively
small speeds.of deformation such as are realizable on ordinary machines
for static tests, discusses laws of the theory of plasticity and iheir
reliability as indicated by:experimental findings. Graphs. Seven ref-
erences.
Institution
Submitted August 2, 1954

USSR/Engineering Metallurgy
T,
FD-2745
Card 1/1 Pub 41 - 6/16
Author Danilovskaya, V. I., Ivanova, G. M., Rabotnov, Yu. N.,
Moscow
Title Creep and relaxation of cbromium-molybdenum steel.
Periodical Izv. AN SSSR, Otd. Texh. Nauk 5,..LO2-108, May 1955
Abstract Describes experim-ents performed to determine the amount of
permanent deformation which takes place through creep., when
a 30 MIPLA steel is subjected to elastic deformation at 5000 C
for a 100 hour period., Relaxation is discussed, and it is.
noted what effect creep, relaxation and deformation have on
the tensile strength and the aging of steel, as well as on
each other. Graphs and formulae.. Five references., 3 USSR.
Institution Institute of Mechanics, Academy of Sciences USSR.
Submitted March 31, 1955

AUTHOR: Rabotnov, Yu. N. (Moscow) 24-5-3/25
scriptions of unsteady creep with an
TITLE: le
application to the study.of creep,of.rotors.
(0 nekotorykh v,ozmozhnostyakh opisaniya neustanovivaheysya
polzuehesti s prilozheniyem k issledovaniyu polzuehesti
rotorov).
PERIODICAL: "Izvestiya Akademii Nauk. Otdeleniye Tekhnicheskikh Nauk"
(Bulletin of the Ac. Be., Technical Sciences Section),
1957, No-5, pp. 30 - 41 (U.S.S.R.)
ABSTRACT: It is assumed that.there.exists a functional relation
between tension, plastic deformation, speed of plastic,
deformation and temperature, for creep metals in a
uniaxial tensilestate. This may be written in the form:
(p T) = 0
Card 1/7 For the treatment of experimental data thefollowing
relation is recommended:
p~' exp ICY I
( A
where
p

Card 2/7
on some possible descriptions of unsteady creep.with an
application to the study of creep of roto S. Ocont.)
A-hy'15
here p is the absolute magnitude of plastic eformation
(cf. refs. 2 - 4). The constants K, a and A depend on
temperature. The table on P-31 gives experimental values
of these parameters for a number of materials and
temperatures, Eq. (1.1) may be put into another form by
the substitutions: 1+CL
5 = .2 - = Be - = & 'r = K (E)
Al A I P A I t
so that
PL exp: cf (1.2)
The region of small tensions is excluded and eq.(1.2) applies
only when b p a > 1. The equation is,appliedto.the case
of creep under constant:load,,so tha
p e m m (1. 3)
M XP +
For c E;O constant, i.e. in the case of relaxation
1
0 CO (p0) + exp Col
Here u
(u) uQ exp uda

On some possible descriptions of unsteady creep with an
application to the study of creep.of rotor!, (Cont.).
24 -3/25
If relaxation takes place after instantaneous ektension in
the elastic region, the formula (1.4) can,be simplified
and takes the form
a = Go (,r exp 00) (1-5)
Two problems are considered in the case of uniaxial,
tensional state:
(a) Aspecimen connected to a spring in which relaxation
does not take place. Here the relation between tension
and plastic deformation can be written in the (linear) form
a
0
(091 y are constants depending on the nature of the
e1 stic connectionand initial conditions).. Substituting
this into (1.2) and integrating:
(I CT0 X-l -CY I+M~exp a
01
Card 3/7 (b) The case when the load changes with time.thus:
a ao~.+ aL sin r,

On some possible descriptions of unsteady creep with an
otors. (Cont.) 24-5-3)2.5,
application to the study of creep of r
Hence P exp (a + 0 m (2.2)
m 0 0
where
a 1g 1 .1 (2n Cf
0 Z 2n n) 0
0 2
In formula (2.2) periodic numbers are omitted; only that
part whic'h continuously increases with time is retained.
It follows that,:under these conditions, the creep under
the action of a load changing within the range of -cr,4ao+cr
takes place as if there was a constant tension 0 10 01
0 + 0it. 0 0 - a 01 must, of course, belarge enough for.
-n s
(1.1) to hold. It has bee hown (5) that
AIR%
K = K exp
0
ce,rd where k = BoltzmAnnis constant and AH is the activation
energy which is.constant for a given metal. Hence,
instead of (1.2) we have
V-

on some possible descriptions of unsteady creep with an
application to the study of creep of rotors. (Cont .) 24-5-3/25
p' exp (0 (1.6)
kt
The theory of uniform creep, expressed.in eq.(1.6) does.
~Iot take into account various secondary effects,.e.g.
Inverse creep, by which is meant a partial restitution of
deformation after unloading. Generalisations-of the
relations established for uniaxial tensile states to the:
general 3-dimensional case are'very difficult. To.begin
with it is assumed that thespeed of creep has a potential
so that
bij
Fc~
The function f depends on plastic deformations as well
as a... It is also assumed that f depends on two
inva-Hants: the stress tensor and the tensor of speeds.
Card 5/7 of plastic deformation e.j
.a. a ij oij (stars indicate deviator of
the tensor) and

On some possible descriptions of unsteady creep with an
application to the study of creep of rotors. (Cont.) 24-5-3/25
112
P dt (4.2)
3
0
Assuming f f(ai? P),, then from .,-+.l) one has
A 2 ~f
pij E C'ij ~-- '3
ij 7G- 74
In order to obtain (1.2) in the case of simple stress one
~Puts 2 Cri
3 K p exp A
It follows that a.
j = J-K p--Q (e
P
i XP a
If 1 > (2 > a 39 s Cr a3` 2p p, 7. P3~~ then it,
follows from (4.1),that b, -b3 P2 0 and'
Card 6/7 instead of (4-3).one has
-a s
P~= K p exp

ve, A/
,1LUTHQR5: Blagonravov, A.A, and.Rabotnov, Yu. N. 24-11-1/31
IRITLE; The Technical Sciences Division on the Occasion of the
Fortieth Anniversary of the GreE.t Socialist October.
11evolution. (Otdejeniye Te'Khnicheskikh Nauk k 40-letiyu
Velikoy OktyBbrlskoy sotsialisticheskoy revolyutsii).
PaIODICAL: Izvestiya Akademil Nauk SSSR Ctdeleniye.Tekhnicheskikh
(USSO
Nauk, 1957, NO-11, PP-5-9
AB5TRACT; The Technical Sciences Division of 'the Ac.Sc. consisted
at first of the foll9winE; five gToups: power en6ineering;
o
engineering physics; en6ineering chemistry; eng;Lneering
mechanics and mining. Furthermore, it controlled the
Power ]Research Institute (Energeticheskiy Institut)i t~e
Institute of Mined Fuels (Institut Goryuchikh Iskopayewykh)
and the Coiwaissioa on Engineering Terminology (Komissiya
P0 Tekhnipheskoy Terminologiy). The volume of scientific
activity of the Technical SciencesDivision increased
appreciably in 1939 when fifteen new Academicians and
. twenty-nine Corresponding Members were elected. In the
, same year the following were incorporated into this section:
' The Institute of Mining (Institut Gornogo Dela);
Institute of Metallurgy kInstitut Metallur ii);
Card 1/i1 Institute of.Mechaaics (Institut MekhaaikM.

N
24-11-1/31
-The Technical Sciences Division on the Occasion of the Fortieth
Anniversary of. the Great Socialist October Revolution.
Institute of Mechanical Engineering (Institut Mashinovedeniya);
Institute of Automation and Telemechaaics (Institut
Avtomatiki i Telemekhaniki) and a number of others.
At.present.the Division has twenty-nine Academicians and
seventy-four Corresponding Members, it comprises eleven
research institutes, seven, indeperident laboratories,
onellsectiod'and one committee and publishes four journals.
Over 7000 people work in the establishments of the1~visjon;
of these 2800 are scientific personnel including twenty-
three Academicians, fifty-seven Corresponding Members,
two hundred Doctors of Science and 352 Candidates of Science.
Orily'a few of the most important results obtained in the
Scientific' Establishments of the'Technical Sciences Division
of the Ac.3c. are dealt with here,
Metals. In the fleld of investigation of metallurgical
processes a theory of blest furnace smelting under pressure
vies evolved which permits justification of the oractical
application of the method. New theoretical concentions on
the processes of coke combustion in the hearth of blast
furnaces enabled development of technological methods of
~Card 2/11 influencing the dimensions of the combustion zone and the

-The Technical Sciences Division on the Occasion of _Iia Fortieth
AanAversary of the Great Socialist October RevoNka;flnoa.
entire characteristic of the blast furnace _qpocess. Methods
Qf granulation (pelletizing) of ore-coal ,Vq,-,4tures were
developed. Important theoretical invest,1--l-AlLons were
.carried out relating to the interaction of 11tatals and the
Yzinetics of phase transformations; a number Df new high
strength and special alloys were developed. Much work
has been carried out for the purpose of -AIR.Mning purer
titanium and of studying the properties, RM diagram of
state of titanium-based alloys and of the 'Oorluence of
alloying elements on the properties of ti-T-Mium alloys,
particularly the heat keisistance. Work is -la progress on
developing new semi-conductor materials 7--=- on germanium-
silicon-chemical elements of the third grtviv with elements
of t,he fifth group, compounds of.chaleopyri.Vm.and others.
Oil. Of the new high molecular compounds, '11DBt attention
=Spaid to polypropylene; systematic study *3 being
carried out at the Oil Research Institute ( fastitut.Nefti),
as a result of which crystalline pol-p,&vF%VAWe was
obtained from which the first specimens of 01is new fibre
have been produced. A process of high tiajg~ cracking was
Card 3/11developed which enabled reduction of the 2&ejiuction costs

24-11-1/31
The-Technical Sciences Division on the Occasion of the Fortieth
Anniversary of the Great Socialist October Revolution.
by about 50% and of the specific-first costs by 40 to 60%.
A new synthesis was developed of high fatty alochols by
direct oxidation of paraffin hydrocarbons omitting the
stage of hydrating of liquid acids obtained by oxidation
of paraffin. The obtained alcohols are used as a raw
material for producing fine washing media (detergents),
which is of great importance from the point of view of
saving edible fats. . Great strides forward were also made
in turbo-drilling; over 83% of the total drillings (in
terms of the combined total of thedrilling depths) is
at present effected by turbo-drilling.
Solid Fuel. The Institute of Mined Fuel jointly with
the MinisEr-y of Ferrous Metallurgy (Ministerstvo Chernoy
Metallurgii) developed scientific principles of continuous
coking, a process which is about five times as intensive
as current methods and enables obtaining high quality
metallurgical coke from coal with bad coking properties.
50 to 70% of the coal from the Donets, the Kuznets.
and Karaganda deposits and up to 100% of the coal reserves
of the Irkutsk, Minusinsk-and. the Bureinsk Basin consist:.
Card 4/11 of such cloal., A new process of centrifugal desulphuring

24-11-1/31
The Technical Sciences Division on the Occasion of the Fortieth
Auniversary of the Great Socialist October Revolution.
and de-ashing was developed which permits.increasing
appreciably the productivity.of blast furnaces andto,
reduce the coke consumption; the resulting economy in
the Donets Basin alone is about 600 million Roubles in
capital costs. The Power Research Institute developed
a process of combined power-technological utilisation of
solid fuels, i.e. coal, peat and.shale..
Mining. Highly efficient,variants were developed of
underground working, breaking up of.the ore by means of,
deep explosive charges and using a new design of the
bottom of the chamber which permits intensification of
the removal of the broken-up ore. Compared to existing
systems, this method enables speeding up the miningto
double theconventional value and to increase the
productivity of labour 2.5 to 3 fold, to reduce the
silicosis danger, to improve the conditions of work and
the safety. Investigations are in progress relating to
the theory of beneficiation processes, i.e. flotation of
coal and ores.
Power One of the major complex problems in this field is
5, 1t~
Card 1 t evolving of scientific bases of.the development of

24-11-1/31
The Technical Sciences Division on the Occasion of the Fortieth
Amiversary of the Great Socialist October Revolution.
power systems and integrating it into a single power
system". A large number of establishments of the Ac.Sc.
and of other institutes are working on this problem under
the General direction of the Power Institute imeni
G. M. Krzhizhanovskiy (Energeticheskiy Institut im.
G. K. Krzhizhanovskiy). Investigations in this field
comprise a large number of problems: power generation
generally, electric power generation, thermal power,
bydraulic power. A unified power system of the European
part of the Soviet Union is being put into effect in the
Sixth Five Year Plan period. At present research and
development are directed towards the creation of a unified
power system covering the entire territory of the Soviet
Union., In this respect the Academy has carried out a
large number of investigations,.including determination
of the behaviour of super-long distance transmission lines
of the order of 2000 km and longer operating with voltages
of 400 kV and higher and powers of the order of two million
M Creation of a unified power system of the European
part of the Soviet Union is likely to result in an annual
Card 6/11 economy of 400 million Roubles and the additional cost

24-11-1/31
The Technical Sciences Division on the Occasion of the Fortieth
Anniversary of the Great Socialist October Revolution.
involved in constructing the necessary power transmission
system will be recuperated in less than ten years. As a
result of further investigations, the installed power of
the system of hydraulic power stations along the Volga and
the Kama Rivers will be increased by two million kW
compared to the originally scheduled capacities.
Mechanics. The Institute of Mechanics of the Technical
ences Section claims a number of achievements. The
most important one in the field of thetheory of elasticity
and plasticity is the evolution of a theory of strength,
stability and vibrations of thin elastic shells and thin
Wal-lgdthree-dimensional systems; this theory was developed
as a result of analysis of accurate equations as,well as
by e7olvihg approximate engineering calculation methods.
As regards the theory of plasticity, the theory of limit
equilibrium was evolved and also the "theory of small
elastic-plastic deformations"; by means of the latter a
number of concrete problems were solved. Much attention
has been paid in recent years to applying the theory of
plastic flow of:metals to shaping by means of pressure.
Card 7/11 Experimental and theoretical investigations were carried

24-11-1/31
-The Technical Sciences Division on the Occasion of the Fortieth
Anniversary of the Great Socialist October Revolution.
out of creep of metals at elevated temperatures and methods,
of creep calculation were evolved., General methods were
evolved and concrete problems were solved using the theory
of limit equilibrium of loose media. In the field of
general mechanics important results are claimed relating
to the theory of stability of motion ~ . A general theorem
of instability was.evolved and effective methods were
developed for analysing the stability of non-steady state
movements. Much work1was devoted to the theory of
stability of movement, to the investigation.of the stability
of aircraft and the spin movement of artillery shells. In
the field of hydromechanics effective methods were evolved
of calculating the steady state and the non-steady state
of seepage of liquid through porous media and on the basis
of these methods numerous problems were solved relating to
oil well operation, seepage of water under the foundations
of hydraulic structures etc.
Mechanical EnEineering. In the Institute of Mechanical
Engineering, methods were evolved for investigating the
stresses and strains and calculating the carrying capacity
of large size structures as applicable to large hydraulic
turbines and large hydraulic presses. These methods were
Card 8/11 utilised in designing new hydraulic turbines, including

24-11-1/31
.The Technical Sciences Division on the occasion of the Fortieth
A=Jversary of the Great Socialist October Revolution.
the turbines of the Kuybyshev and the Bratska hydraulic
power stations;.to ensure reliable operation of large
turbo-generators (100 000 kW and higher) oscillatory
phenomena were investigated in thesystem rotor-stator
under steady state and transient conditions. Analysis
of the stress conditions of the individual elements of
the structure has revealed the analogy laws for*the case
of fatigue fractures; this enabled design improvements
resulting in an increase of the fatigue strength of the
rotors. Friction and wear were investigated and a new
material was developedfor highly stressed engine bearings
and also a new friction material for brakes.
Automation and telemechnics. New principles and methods
were evolved of analogue computers and analogues have
been built, the design of which is being improved
continuously. An "aggregate" unified system of automatic
control and regulation is being developed which consists
of a small number of standardised blocks and differing
combinations of such blocks permits obtaining an extreme
variety of.apparatus and circuits ensuring the control
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The Technical Sciences Division on 'the Occasion of the Fortieth
Anziversary of the Great Socialist October Revolution.
automatic regulation of compressor operated oil wells
has been evolved which is successfully applied in
production; in the Baku area about 95% of the entire
quantity of compression operated wells are automated and
this enables increasing the oil extraction, economy of
electric power and reduction of the operating personnel.
Radio-active isotopes and radiations. A radiometric
method was evolved fok distinguishing oil bearing rocks
from water bearing ones, new data were obtained on the
distribution of alloying elements in light alloys in
dependence of various pertinent.-- factors and the process
of diffusion of iron in solid iron base alloys was studied.
A radiographic method was used for determining the real
area of contact between matinig metallic components, which
is of importance from the point of view of wear studies.
Radio-active methods were also used for studying the
solubility of various substances in steam.
In this brief article only some examples could be enumerated
and they do not represent an exhaustive survey of the
research progress. Numerous Academicians carry out their
Card~lo/llresearch work directly in industrial undertakings.

AUTHORS: and Tulyaklov G. A. (Moscow).
Odinp I.A.) 24-1-1/26
TITLE: Creep of austenitic steel in the case of co mplicated stress
states. (Poizuchestl,austenitnoy stali pri slozh-no-
napryazhennoia, sostoyanii).
PERIODICAL: Izvestiya Akademii Nauk SSSR Otdaleniye Tekhnicheskikh
ITO *1
pp. 3-19 (USSR).
Nauk
1958
,
,
,
ABSTRACT: Most of the theories of cree-o in the cas e of complex
stress states are essentially extensions of the thaory of
plasticity. N. 1,11. Belyayev (Ref.1) and Yu.
-- N. Rabotnov
(Ref.2) proposed usin6~the theory of - e T a--s It -1c---p I -as t i c
def ormat ions., In the case of steady state creep -the,
analytical exDression for ~he speed of cree p, whic~i is not
li,.-,iited -to a sin~,le w.,ris, can be expressed by the following
equation:
n-1
v A a Cr (CY a
7 (123) (1)
1
1 2 3
where A a ild n are, constant coefficients and depe nd on
v = Aan which are determined Iby means.of te nsilecreep
whilst -the
tests
symbol (123) denotes that the fori:,ulae
,
,
for v and v- are obtainedby suitably chonoin., the
Card 1/6 'nclice~ in rotation. Similar relations are obtained by.

24-1-1/26
Creep of austenitic steel in th,,a case of complicated stress states.
means of the theory of creep which represents a further
development of the theory of flowafIllyushin, A.A. (Ref.3),
Malinin, N. N. (Ref.4) and also of the theories of
Soderber6, C R (Ref.5), Ma-rin,.J. (Ref.6),and.
Odquist, F. ~R;f-7)- On the basis of-a nuraber of special
experiments, Bailey, R.W. (Ref.8) recommends a different
formula for calculatin6 three-dimensional creep, whilst
I . e another formula.
Johnson A E. (Refs.9 and 10) recom,~i nds
Eq.(l) contains only t,,,.,o constants A and n.which can
be determined fro-.,,, creep tests in tension. 'The formula of
Bailey contains a larGer number'of constants, uhichhave
to be deteiTiined froa creep tests at a differentsturess
whilst the equations of John,-on are more cuiibersome
t at e
s
and less convenient for practical calculations. Creep,
tests,carried out by Bailey and Johnson (Refs.8-10),in
tenSion and in torsioa on,thin walled tubular 5pecimens
fundaTaQritcilly confirra the here expreosed views. However,
the duration of these tests Iias only 150 houl-S
not lon, enouiSh. In thiss, paper theresults are described
of lon.- duration creep tests under co-,iplex, stress..
Card 2/6 con,5.itlons at a tai--perature of.600 C. V--3 e;--per1.--:ients

24-1-1/26
7
in t!-_- case of
Offected in a sr)ecial test ril*: described in earl-ier
(Ref.11.) in 1,hich 32/20 -tubes (a_Q shc),.,ir. in FL~.I) of
current industrial menufacture vieve subject- to the effect
of t~,. constant tezision -and a corister.1; torsion The
.,ens were evade of austeni-ic stet;l the
-oeci c
folj.Qwir~! Co-mositiors: 0.0% CI O.7C,2j' MI'll 0-36/0a' -i
r ? i
01. 01056, S 1 0 - oi8-"" P 1 17. 18% C 1 10. C-Zclo Ni 1 0. 4?j~,' To. The
heat 'rsat.,,ient consisted of annealinZ, for thirty _minuteu
at 1100 C followed by cooling in air (austenisation), each
Specimen Vlas subjected solely to a sin-le expieriment -.alth
a constant ratio of the ten~.ile otres.Iesl al to the
torsion stresses 'r The followinG T to cr. retibs
chosen: va'.= ~O , ;:%0' 1.0, 0.61 0.51 0.41 0.3,
for each r -to cr ratio at least two, specimens V,,r-*re
tected. The duration of a sinc-le 'best demanded on the
~ LJ -
r,ia:,nitude of the applied stresses; in eaeb case the
e,xperii,ients ,-,ere continued until the cteady state second
section of, the creep curve was rexached.. . Most experiment-1;
lasted 1500 to 2000 hours durinf- usually a constant
creep speed became established.. This.duration is also
adequate fror:i the ~point of view c,'L overcomip- the period
".t. iiitensive af,,oini~. Soi-:ie exi)erifaents la.-ted less
C,,(, 3/6of noc

24-1-1/26
Cre--p of e~usteni-ic steel in -the case of cc-, -rIiccA-e-; C
stress C-tates.
th~~an 1000 hours, nc-mely, in the case of st-I'esses Ext -V-I;hic-h a.
trancition to the third s--5a6e of creen obvioufly -11-oolz
place. The results are entered in Table 1 and L~i-anhedin
Fi;- E~ . 2 - The e-.jperiment ally dote-!-.-ADed values are
compared values calculated by ;1eam'. of Eq.(1) in
Table 2, p.0 U -1 terialned
./; on thc avera 7e e5:!'QriiaCht-LIlY do
-Peec, t Ms as hii---11. as th,-i
creep S- LS are 2 5 to 3 if- , values
cz.,lculated by ticans of Eq,(l). Tide authors of -this paper
propose usinL for the sE--ae purpose E;ls.(G) and (7), P-5.
The authors, arrived at the cone lusi one:
1. The experij.,iental results confir--ii th-:7 rapplicability of
the creor theory .-,which is based on th-e theory of plastic
flow for describin,,_~ the process of st-eady stt.-te creep for
durations up to 2000 hours.
C2. The stress calculations for co;,iponen-*UE- operatill"j- under
cre,~p conditions with a complex stress state cail be
effected on the.basis of.creep test results in tension but
it is necesE-ary to, improve the accur*.cy of the ex,,I.eriment-
--lly deterainer! calculation ooeffied-Lents for each Croup of
mate---ials under consideration.
A i--aterial which is under creeT) stres-z conditions in
Card 4/6 texr.-z-1on and torEion Genorally cou-plies .-,:ith Vie cr-iterion

24-1-1/26
Cre,~-o of austenitic steel in the case of complicated stress states.,
of Dlastic flow of Hankey. However, Vhe relaLion
V. F(-z-) is not entirely fulfilled. since the ten-,ion
a~d torsion curves are not identical in octahedric
coordinates.
4. In the case of low creep speeds, the most accurate
3nd theoretically the most justified is an exponential
dependence between the speed of creep and the stress.
This relation is correct for all the investigated types
of stress states. The speed of steady state.-three-
diaensional creep should be calculated in accordance with
Eq.(6), P-5.
5. For thetested austenitic steel 1Xl8HqT, the power
dependence betvieen0the creep.speed and the stress for a
temperature of 600 0 approximates satisfactorily the .
exponential.deDendence for a wide range of creep speeds
4% therefore the exponential
(from 10 %/hr and higher) and, I
dependence can be used for practicalcalculations since.
it is simpler andmore convenient.
G. Creep:tests of the austenitic steel lXl8H9T in.tension
and torsion did not confirm the assumption of coincidence
of the directionsof the main stresses and the main axes
of the deformation speeds over lonG, periods. In the
Card 5/6

a 24-1-1/26
.Creep of austenitic steel in the case of complicated stress States.
case of non-uniaxial stress states, a redistribution of
the main creep speeds is observed whereby the creep
speeds in the iaain directions vi and V2 are equalised
aild the creep speed in the -third main direction, v
tends -to become zero,, 3
Under conditions of long duration touts, the creep
theory, which is based on the assiuaption of isotropic
behaviour of real conuaercial alloys, requiresIcorrections
which can be established by studyin~S the:physical nature
of,creep in the case of complicated stress states.
There are 2 tables, 8 fi,-,-ures and 12 references
6 Russian, 6 Ens-lish.
'S' RJITTED: Mar
lu eh 67 1957.
~'OIAILIOLE: Library of Congress.
Card 6/6

PHASE I 300-K EXPLOITATION SOV/3416
Akademiya nauk SSSR. Institut mashinovedenlya
Voprosy prochnosti mterialov i komtruktsiy (Problems of Strength of
Materials and Structures) Moscow, 1959- 399.p. Errata slip inserted.
3,200 copies printed.
Reep. Ed.: D. N. Reshetov, Professor, Doctor of Technical Sciences;
Ed. of Publishing House: G. B. Gorshkov; Tech. Ed.: S. T. Mikin.
~PURP06E: Tbis book is intended for engineers and scientists concerned with
the problems of the strength of materials and construction,ol
COVEIPGE: The book -contains 28 articles on the strength of mterials in
general and of machine construction in particular. This collection
was prepared under the direction of the Institute of MechanIcal. Engineering
of the AS USSR in honor of Sergey Vladimirovich Serensen, one of the
founders and directors of the national school of strength of materla.1s,
who recently completed 30 years of scientific activity. The preface gLvos
a short 6ketch of his life and professimal activities. The collection
Is divided int-0 tvo parts. The first part contains 13 articles on general
problems of strength and the strength of machine construction materialsi.
Card 1/6

Problems of Strength (Cont.) SOV/3416
The second part contain 15 articles on dynamics and calculation of
strength and rigidity. There are references at the end of each article
TABLE OF CONTENTS:
Part I. GENERAL PROBLEMS OF SMiMTH AND THE STIM7H OF HOLCHM-BunmXG
MATERIALS
Rabotnov, Yu. ff. Mechanism of Failure Caused by Creep 5
Davidenkov, N. N., and T. N. Chuchman. Problem of the Connection Between
Cold Brittleness and.,Tvinning
Popov, G. G. Testing the Strength of Steel by Preliminary.Cyclic,
Overstrees 14
Vaganov, R* D., and 0. 1. Shishorina. Effect of Concentrating Stresses
Under;the Action of Varying Loads 36
Pisareako, G. S. Problem ofthe Strength of Brittle NaterialsTroduced
Card 2/ 6

Problems of Strength (Cont.) SOV/3416
Ymdryavtsev, I. V., and L. M. Rozenman. Relieving Residual Stresses
During Axial Loadings of Surface Riveted Bars
Y.0sayev., V. P., and T. A. Beksh. Construction of a Complete Fatigue
Diagram 166
PART II. DYUAMCS AND GAW=TION OF STRENGTH AND RIGIDITY
Kononeako, V. 0. Natural Vibrations of a Nonlinear System with Ferlodlcalljv
Variable Parameters
Bolotin, V. V. Problem of the Stability of a Plate ina Compressible
Gas Flow 194
Dimenberg, F. M., and Gusarov, A. A. Deflecting Force in a Flexible
Bean Caused by the Forces of Imbalance 205
Grobov, V. A. Asymptotic Methods of Studying Nonstationar7 Vibrations
of Rotors Passing Through CriticalSpeed 219
cae, 4/16
E

Problems,of Strength (Coat.) SOV/3416'
Kovalenko, A. D. Analogy Between Problaw of'SlIghtly Bent and Non-
uniformly Heated Circular Plates of Varying Thiel- an 235
Ponoasrev, S. D. -Calculation of Syz=etrically Ioaded Stopped
Circular Plates by the Method of Initial Parameters 242
Sokolov, S. N., Determination of Breaking Pressures in Spherical Con-.,.
tainers 5
25
Mall.nin, N. N. Calculatioxi of Creep of Rotating Nonuniformly Heated
Discs of Varying Thlbkness 268
Peshin, Yeugen. Practice of Calculating Parameters of Rotating Discs
During Plastic-Elastic Deformation 288
Shneyderovich, R. K. Plastic-Elastic Deforuing.of a Boma of Circular..
Cross Section During the Simultaneous Action of Beading and Torsion 296
Balashov, B. F. Fatigue of Compressor Blades 315
Card 5/6

Problems of Strength (Cont.) SOV/3416

ME
ON
M1

AUTHOR: IvIev, D.D.
TITLE t Conference or. Su~taimed Static Strength of rurtine
Cda;lcaents Workicii at H16h Temperatures (Sovesh:taniye ;o N

dlitellwj staticheskoy proc),-scl det
ley tu.-tcms6tim, _
rabotayuahchikh pri vysokoy te--peratur ) -
:
PERIODICAL: ltv*atlya Akadezll ll&uk SSSR. Otdelenlye Tektn'cteskjkb 115
Sauk, 1958, Nr 4, pp 49 - 150 (USSR)
ABSTRACT. fto Commission on the Strec~th or Gas Turbines from the
Institut Bekban1ki All SSM LInstitute of Xechanlcs of the
Ac.sc-USBR) (Chalr=an - Yu.3. Rabotcov) and the Strength
Section of the Leningrad Technical Co"Ittee on T%Lrbine
Owntructio a(Chaircan - V.K. Nauzov) held a ccnference t~
during mov;aber 20-22. 1957 on the sustained static
strength c turbine -ceponents working at high lerpers-Lr-~.

5
8-4-33/39
soV/2"
Conference an Sustained Static Strength of Turbine Components
Torking at High Ttoperatures
G.A. Tulyak (T3411TILASh) described the result* of an
AV
~al investigation of creep in the boiler %tetl
NY I-, under complex stress coadIt-10--s.
;~
_VJL-L&U (TATI in. Polzuwv) gave a paper on
Investigation Qf Deformation and Sustained Strength of
tubes* ccotsin"-g results on the study of creep umler
coaplox stress cozditioas.
A.W. G-ubin (Vyssheye Voyeano-moralcoye uchilisr.':tc 1--.
.Ins _,,,ed .;Oval sch,~j --=. r%or xt' maic:j)
read a paper or "Calculation of thi *Fir-tree" Roots or
D lsdes~of Gas Turbines in the Creep. Deforiat ion Region'
_1 ,. U.Ilach_ir--- (Lonimeradokiy goaua!rstvencyy univorn'ttt
l eningrii Statt University and TAX, I izz. Polx%:mov) deilt
Iith creep un-Isr Initial plastic deformation, zitL a view
10 calculating the deformation state of C0=P0nftDt3 Zadt
from special beat-resistaat stools.

unscow State University, Instit,4t =e4tanici
~
ut* or gacbAmics or the Ac.Sc.US32, doacribtd
the results of theoretical and ~=erizentil. :iz%vebt_,E&Zw4a
unatead., creep under cocplez stress conditions. lie
remarked that there we exists a theory, agrat Ing
facter.'Iy with experimental data. sLich, permits ttt
calculation of tne stress and deforzotion state in turbine
dlsks~ and ro~jg at blEt to=perazures. Ift addi-ion he
'
boa d
aratus for Investi
atin
st
nstruct
d a
l
Z
e
4%-
e
gm3
g 9
pp
g
talned strength and creep of rest resisting alloys una~.r
complex stress conditions and a number of valuable
results have been obtained witL tLis apparatus,
B.P...59kcov (TcKT1 it. Poltunov) discussed the choice
of the rwarure of loadine of components working at biEh,
temperatures.
E_V.. Sorensen (TsIAL) gave a paper "On Construztio=&.'
,!!r!.
actors-or-Sustalmed Static StrenEth' wtich describe!
results cbtalu*1 on low-pow*r turbine e;u1p=tnt.
The paper or .1F.g
Kg "no, Ly dealt itL the hearing,
:!
capacity of tu'r a rtor
t.
Wazxy participants remareed or. tre increasing need for
ostensive cC.*zzlm&t1dz of ark in tte field of Atztnctr.
Cord5/7 of gas itu.-b*_=es.

2406) SOV/179-59-4-12/40
AUTHORS: abotnov, Yu. N., Rab ovich, V. P. (bloscow)
TITLE: On the Stl-rength of Disks in Creep
FERIODICAL: Izvest-4ya Akademi-i nalak SS3R* Otideleniye tekhaicheskikh nauk.
14ekhanika i mash-inostroyeniye, 19510, Nr 4, pp 93-100 (USSR)
ABSTRACT: The results oIf the experiments fcr the strength test of disks
in creeping are put forward. The problem of strength of a
turbine wheel disk subjected to creap conditions consists of
2 tasks: 1) Determination of strains and deformation, and
2) determination of the conditions causing the destruction.
~The investigations described had pr1ma=-fly the purpose of
checking the correct determination of stresses and deformation.,
by experiment. Second, the conditions were checked under which*;
the wheel disks are d,3stroyed in c=eep. The usual calculation,.-,
method is based on the assumptlon that the maximum creep
strength of the material is equal to the maximum standard
stress calculated according to the simplest aging theory
(Ref 1). It is shown here that this calculation Method ensures...:..
a satisfactory accuracy in the forecast of disk life, and,
Card 1/3 therefore may be used as a basis in the ch ice of admissible

On the Strength of Disks in Creep BOY/179-59-4-12/40
stress. It is shown that the properties of the material
influence the strength of wheel disks. The investigations were
carried out with 4 different materials used in turbine
construction; perli,te steel R-3, austenite steel EI-405 and
BT-972, and nickel alloY EI-437b. The experiments were made at
~!ppel tester of the TsNIITMASh (Central Scientific
Aesearch Institute of Technology and Machinery). The
computations were carried out on the "Strela-3" electron
computer by means of the program developed at the Institut
im. Baranova (Institute imeni Baranov) by A. V. Amellyanchik
(Ref 4) for the elasticity- and plasticity calculation of
disks. - The experimental results.show that the strength of
disk depends on the creep strength and on the ability of the
material of redistributing the stresses. The latter ability is
characterized by the value m. The diagram of the influence of
a central boring on the disk strength is shown in figure 6.,
It is shown that this influence does not only depend on the
share of the boring on the disk surface, but also on m. The
experiments showed that in the case of good material properties,
the stresses are also redistributed in flat disks if there is
Card 2/3 a creeping, i.e. that the principle of "equal strength" can be

C-1 LOL
IL
VI
Ali
104 Js
. 11 jD:1 :r ;Z ,a
v a C=.j

28255
~P/006/60/008/003/001/009
21 D265/D305
AUTHOR: Rabotaov, Ye. N.
TITLE: Creep of metals and i to computation
YERIODICAL: RoIzpravy imiyniershiet va 8, no. 30 1960, 349-394
TEXT: After describing in detail the creep of metals and its reprosom-
tation on strain-temperature graphat the importance of the ozaet *Valua4i"
of creep is stressed for designing machine, elements made, of b*at-resixting
alloys for which small deformations take place at bigh tomp*rateres, Ue
relationsbip between the creep strain, stream and time of lo ,&ding is dis-
cussed for the following creep theories% (A) The theory of aging--
f
'(D) The theory of flaw--
t)

28255
Creep of metals...
(C) N. M. Belyayev's theory--
dt
(Ref. 2: Izvestiya AN SSSR, OIN no.7, 1943); (D) The theory of,strain
hardening based on the hypothesis of the equation of state--
69 T) 0 (2.4)
where plastic deformation, B tress (6)
instantaneous de;o'rlnation; (19) The theory of plastic inheritance due to
Volterry. The comparison of these theories and their suitability for vari-
applications is discumsed,and the obtained results are studied for their
verifications with the experimental data and the simplicity in various prac-
tical calculations. The conditions are analyzed for.the steady-state creep
introduced, in which the stresses are unknown and the strain rates are not
constant. Relaxation an a phenomenon allied to creep is defined, and the
equations for the steudy-state creel and for relaxation are givens from
Card 2/4

2,8255
P/006/60/008/003/001/009
Creep of metals... D265/D305
whi ch the distinction between the instantaneous plastic deformation and
that due to creep is apparent. The experiments carried out at the Institut
mekhaniki (Institute of Mechanics) AS USSR by G. M. Ivanova, (Ref. 13: Izv.
AN SSSR, OTN, no. 4, 1959) are described in order to find the relationship
between the influence of the temperature changes and creep deformation.
The mechanism of the failure's origin and the crack propagation leading to
destruction of test specimens under creep is analyzed by summation methods
for variable leading. The equations representing the creep for complex
stresses are derived from the theory of elasticity and the notion of plastic
potential is introduced. Recommendations are given for the scheme for cal-
culating relaxation.. Various experiments and research work are described
for a number of machine design problems, from which it follows that the
t3ost simple methods of~comjxtution lead to sufficiently accurate results
and provide the basis for stress determination. The author gives some com-
putation methods for solving rotating disc problems on the basis of the
theory of strain-hardening, taking the stress-distribution into conside.ra-
tion, which is particularly important for analysis of non-steadystates~
The stabilitT 1,roblems under conditions of.creep are considered for bars
Card 3/4

28255
P/006/60/008/003/001/009
Creep of metals... D265/D305
and sections of thin-walls,and several analytical approaches are considered
for finding the criteria of strubility. There are 14 figures 1 table and
34 references; 27 Soviet-bloc and 7 non-Soviet-bloc~ The 4 most recent
references to English-language publications read as follows: G. Gerard,
A Creep Buckling Hypothesis, J~ Aeronaut Sci. 99 23 (1956); F. H. Turners:
K~ E. Blumquist, A Study of the Applicability of Rabotnov's Creep Parameter
for Aluminum Alloy, J. Aeronaut Sci~ 12,,23, (19561), N. I. Hoff, Creep
Bucklingg Aeronaut Quart. 7 (1956); A. E. Johnson and N_ & Frost, Notes
on the Fracture under Complex SLrei;s Creep Conditions for 0,,b% Molybdenum
Steel at 5500 and a Commerc ially Pure Copper at 2500C, NPL, 2, 31-(1954)~
ASSOCIATION, Institut gidrodinamiki, Novosibirsk, AN SSSR (Institute of
Hydrodynamics, Novosibirsk, AS USSR)

AUTHORSs Rabi~tMn=Y
'N., Sokolov, B. P. 3/032J60/036/03/054/064
DOIO/Z117
A
TITLEs A Device for Testing Materials in Complex State of stream
PERIODICALs Zavodskaya laboratorlya, ig6o, vol U, Nr 3, pp 374-375 (USSR)
TEXTs A simple, small-siz* device (Fig) has been designed which permits the
establishment of any state of stress in tubular samples, and makes it possible
to investigate the behavior of materials under the conditions of a state of
stress in a plane. In the housing of the device described, there In an upper and
.& lower piston an well as a casing. The thin-walled, tubular sample in attached
to the upper part of the housing while the lower part-of the sample in fizod
either to the piston or to the cylinder. If the sample has been fixed to the
pistong an axial elongation stress can be attained by means of a pressure fluid
(highly viscous liquids being recommended) and of the piston with a step-by-
step action. An additional axial compressive stress in attained by the attach-
ment of the lower part of the sample to the casing, and by the pressure liquid.
By applying pistons or casing@ with different diameter*, different states of
stress in a wide interval can be reached. Experiments performed with steel and
,plastics-samples gave satisfactory results. There is I figure.

S/2U7/6t/t)oo/oo4/oj,i/oi2
E032/1-,51/f
AUTHORS Namestrii.kovi V,S. arid Rabotnov,- (INovosibirsk)
IT L E - Hereditary theories of creep
V 11 r 0 of C P~ 1. -Undemii nattk,SSSR. Sibersk-ove otdolen'.I.YC'.
Zhurnal prikladnoy mekhaniki i tekhnicheskoy.fixiki.
no ~ 4, 1961V 14 8 - J-50
,rhXT This is a continuation of previous ifork (1101'.5: Vesta.
MGU, 1948, No.10; Ref.9-, PIMTF, i.,)6oI mo .4 ) .A review is given of
the stro-is-strain relations in tile rorm or integral e(juntions
of* mater-i
which are uilf *able for descri.bing the creep properties al
Lxperimental results for the creep of,the A-ICT (D-16T) alloy
si 11) a t
jected to constant and step loading 200 and 1500C, and the
s0ress relaxation at l;OOC are compared with the theoretical
CUTIvee calculated from the equations of the second of the present
atithors (Reir.9) arid of N. Kh.Arittynnynn (Ref-3:~ I'Some problems in
the theorv or creep". GTTI, 1951) and M. T. Hozovskj.v (Ref.6: ZhTF,
1991. V~21 , No,11), Although the general trend of tiie experimental
re~iilt-% i~~ reproduced by the theoretical. curves, the overall
n1imerical agreement is not good. There ire 4 figtiret-4 and
ard
1/2

H-voif:i I if-Y rhoories of. creen S/207/6i/ooo/oo4/oil/012
E032/E514
L) referencPsz, -j Soviet-m-bloc nnd 4.non-Sovict-bl.oc, The English-
.1 a ii-im Lr follows: Ref,4., Lee E.H~ Vi.-scoelastic
ref'er*(,tices read
Ft allatvs is. Structurat mechanics, Perganion Press, 19661.
I'lirner Bitim(lilist. K~E. A studv ~clf the. applicability.of
Ra Ic. -c n o v I q c r o v 1) pn rayne t or f o r n I umi ii i um a I I o y; JA cronau tS c i
Sk;J01 I TH-A) -Mclrell 31, .1961
Ca r d2
L

f jrlu
Transacti of the All-Union Congress (Cont.) SOV/6201
PURPOSE; This book is Intended for scientific and engineering personnel who
are interested in recent work In theoretical and applied mechanics.
COVERAGE: The articles Included in these transactions are arranged by
general oubject matter under the following heads-, general and applied me-
chanics (5 papers), fluid mechanics (10 papers). and the mechanics of rigid
bodies (8 papers). Besides the organizatibnal personnel of the congress,
no personalities are mentioned, Six of the papers in the present colleation
have no references; the remaining 17 contain approximately 1400 references
In Russian, Ukrainian, English, German, Czechoslovak. Rumanian. French.
Italian, and Dutch.
TABLE OF CONTENTS: J
SECTION I. GENERAL AND APPLIED MECHANICS
Artobolevskiy, 1. 1. Basic Problems of Modern Machine Dynamics 5
Bogolyubov, N. N., and Yu. A. Mitropolveldy. Analytic Methods of
the Theory of Nonlin6ar Oscillations
25
Card 2/ 6

Transactions of the All-Union Congress (Cont. SOV/6201
Kachanov, L. M. On Some Variational Principles and Methods
in the Theory of Plnsticity 358
Kupradze, V. D. The Singular Integral Equation Method in the
Spatial Theory of E lasticity 374
'Rabolnov, Yu. Creep .384
Florin, V. A. Present State and Future Problems in the
Mechanics of Soils 396
Sherman, D. 1. Two- and Three -Dimensional Problems in the
Static Theory of Elasticity ~405
,AVAILABLE: Library of Congress
SUBJECT: Physics
IS/dmp/mas
Card 6/6 2-13-62

(Deformations (Mechanics)) (Strength of materials)

TITLEs Cold resistance of machines and constructions,
PERIODICALt Akademiya nauk SSSR. Vestnik, no. 19 1962, 53 55
TEXTt Cold brittleness occurs in low-alloy carbon steels at such tempera-
tures as exist in the northern regions of the Soviet Union. Austenite
steel alloys do not get brittle. But for economic reasons it is.impossible
to use them. Small admixturee of nickel lower the characteristic tempera-
ture below which cold brittleness occurs; the same is attained by harden-
ing or normalizing. At the Laboratoriya matallovedeniya Vostochno-Si-
birskogo filiala Sibir3kogo otdeleniya Akademii nauk"SSSR (Laboratory
of Metallography of the East Siberian Branch of the Siberian Department
of the Academy of Sciences U3SR) in Angarsk, methods are investigated for
improving the cold resistance of machines.and metal constructions. A
small group is working at an independent laboratory in Yakutsk. A
nauchno-tekhnicheskiy sovet po khladnostoykosti (Scientific and Technical
Council for Cold Resistance) wes established with scientists from Moscow,
Card 1/2

S/179/62/000/002/001/012
E191/E435
AUTHOR: Rabotnov Yu,N. (Novosibirsk).-
TITLE: The mechanics of solids and -the trends- in its
development
PERIODICAL: Akademiya nauk SSSR. IZV,estiva. Otdoleniye
tekhnicheskikh nauk. Mekhanika i mashinostroyeniye,,
no.2, 1962, 3-10
TEXT: The traditional and modern relations between engineering
stress analysis, the theories of elasticity,and plasticity and
the mechanics of continuous media in 3. general form ar
most e
~discussed, including some.conceptions of crystalphysics such as
the theory of dislocations. The author claims.no more than the
presentation of selectedlobservations stimula ted by the current
k
nowledge in the mechanics of solids. The range of.mechanicall
inodelslunderlying fully developed mathematical theories is
greatly limited, for example in thetheory of elasticity by the
lineax- velation.,of stress ands train. The great discrepancy
between the accuracy of the methods,of elastic theory and the
Card 1/4

S/179/62/000/002/001/012
The mechanics of solids E191/EI135
rough approximations by which the local strength.criteria are
Even elementary tre atment
established is highly unsatisfactory..
contains some formulations of "global" failure. The mechanical
,model chosen assists in the overall formulation of failure, for
example the classical model of.elastic instability. The most
important discovery in elastic theory during the last ten years
was that of the loss of "macroscopic" stability,in shells. The
I.inear theory gave excessive critical loads compared with
experiment. Equilibrium shapes:exist, different from,the
initial, and separated from it by 6 certain potential barrier.-
These shapes can be formulated i-nathemat:Lcally*only with the help'
of non-linear theory, taking finite deflections into account.
Accidental circumstances .cause crossin .g.the barrieror "snapping
.over". Another example of a theory concerned with overall
failure is the theory of ideal plasticity. The material can flow
without limit insofar as is kinematically possible. . Thelusual
problem is that of.determining the loads under which the plastic
region develops to the extent,that further increase of the
external loads becomes impossible. An example is the extension
Card 2A

S/179/62/000/002/001/012
The mechanics of solids Elgi/E435
of a notched bar, When the plastic region developing at the
bottorn of the notch extends over the entire cross-section, a.
further increase in tension becomes impossible. The theory of
lasticity of strain hardening materials is also being developed.
So far, reliable results.have been obtained only for the casoof
proportional loading, namely when the components of the stress
tensor (or its deviator) grovr pvoportiorially with-,% single
parameter, i.e. preserving constant ratios between the components.
Attempts to create new theories of.1A.asticity,:more realistic in
terms of polycrystalline materials have so fal- only clarified the
nature of the difficulties; some of.these are discussed and IV/
reference is made to the author's earlier analysis of flexure im,
an elasto-plastic body.(Prikladnaya mateinatika i Mekhanika,,
V.23,'no.1, 1959). , These theories,have received much
attention recently. Many more problems are amenable to solution
but'very little knowledge has been gained on the criteria of
'failure under plastic,,conditions.,, Some attempts have been made
to formulate the conditions.of local,failuro, such as the tearing
strength, but this does.not necessarily yield the full strength
Card 3/4

S/179/62/000/002/001/012
The mechanics of solids E191/E435
.reserve, since some cracks can cease to propagateafter reaching
certain dimensions. Some ofthe crack growth theories in
Russian and non-Russian literature arediscussed... However, the
origin of cracks is not yet clarified or brought into agreement
ifith observed phenomena.' In this sense,the physical strength of
real, plastic materials has not yet been explored. In the theory
of creep, the large scatter between testresults has made-.attempts
of refinement fruitless.. moreover, for 'the main object.in which
work on creep analysis has been concentrated, the rotating
turbine disc, several theories give similar results. The only
difference between theories concerns the actual process and its
'Lime history and not the final results. The field of fatigue,
in spite of fairly reliable methods of engineering prediction, j. Ls
still outside theoretical mechanics. There are-2 figures.
SUBMITTED: January 27, 1962
Card 4/4

S/032/62/028/004/022/026
B124/B101
"LUTHORS: Dayev, L. V., Malinin, N. I., Rabotnov Yu. and Shubin,
I. A.
TITLE: Device for cleep and relaxation testing of plastics
PERIODICAL: Zavodskaya laboratoriya, v.,28, no. 4, 1962, 498 500
TEXT; A testing device based :on the loading of allever. is described., The
~size of the plastic specimens is 55 - 100 mm length, 1 - 10 mm thickness.
The load of the lover can be changed betweenO to 200 or 500 kg. An im-
nroved model of the device for breaking load uP to.1500 kg wa5.tested. The
loading limits ard changed by replacing the lever with 100 arm rafto by a
lever with ratio 1s4. For relaxation tests.the loading is replaced by a
spring. The device can be adjusted for constant temperature. No compensa-
tion for dynamometer deformation during the relaxation test is provided.
Tests of KACT-2,(KAST-V) glass-reinforced plastic show low creep (0.57'a' at
10 kg/cm2) along the warp, and higher creep (3% at 7 kg/CM2) at an angle of
10
45 to the warp. There are 3 figures.
Card 1/2

Yu.~j., akadexik, otv. red.; 1,11ALINIE, N.I., kard.
(?tv. red.; NAZARTOTS, T.I.' red.
[Creep and lasting strength; transactions] Polzuchest'
i dlitelInala prochnost'; trudy. INovosibirAt IzCA-vo
Sibirskogo otd-niia AN SSSRI 1963. 198 p.
(1-11RA 18:2)
1. VsLsoyuznoye soveshchaniye po tecrii raschetov na
polzuchest,' i dIiteltI.MYU P1,00most', Novosibir8kj. 1962).

AID 11r. 985-3 7 June
THEORY OF CREEP RUPTURE (USSR)
Zhurn pi ikladn.
BahobLov Yu. N al r 0y mekhaniki i tekhnicheskoy fiziki, no. 2,
Mar-Apr 1963, 113-123.
The present state of the theory of cr4lep rupture is,, analyzed wiih regard to
tertiary creep, and formulas. describing the creep'behavior and giving the rup-
ture-test time of specimens under tension ar6 d erived'for each type,of rupture.
Ductile rupture (with necking) is discussed with a -constant creep rate and
logarithmic strain assumed. Brittle rupture (without visible necking) is analyzed.,
by introducing a parameter 0)) related to the -structure of the material and as
sociated with the crack-forming mechanism. It is used as a measure of em-
brittlement (in initial state w = 0; therupture occurs -when w - 1). Intermediate 1.
(ductile -brittle) rupture, where. W is usedaia determining parameter in the'
creep function, is examined, and the dependence of strain on the degree of em-.
brittlement is established and used as a criterion of failure'. . The formulas de-
rived are applied also to the examination of. short.time (with Ouratlon*o f the order-
6ftte.'nst7 to hundreds of seconds) and complex- stress, creep processes. A
CaFd 3/2'

NEKROVSKIY, Yu.V. (NovOosibirsk); RABOTNOV, AN. (Novosibirsk)
Ultimate equilibrium of reinforced cylingrical shells. Izv.AN
SSSR.Otd.tekh.nauk.Mekh.i mashinostr. no.3:83-94 Yq-Je 163.
(MIRA 16.8)
(Elastic plates and shells)

RA,-)CTN*OVj ITT. N. (Novosibirsk)

ACCIZ51011 M.: AP4013736 S/0030/64/000/001/0059/0062
AUTHOR: Rabotnov, Yu. N. (A6ademician)
TME: Nonclassical problems in the theory of thinshells (Symposium in Warsaw)
SOURCE: AN SSSR. Vestnik, no. 1 1964j ~9-62~
TOPIC TAGS: thin shell, reinforced condrote,, nonclassicalthin shell problem.,
span,, thin shell theory,, elasticity theony, -afety factor, thin shell use
ABSfRAGT: A symposium on nonclassical onblein in the theory of thin shells wao
held in llarsaw Skytember 2-5, 1963. Inuteadof roading individual reports,the
main s;poaker in each of the five sections oresented a review of all works submit-
ted. The sectidn on thermoelasticity was ;resented by V. Novacki (Poland), on
cohesion and creep by Yu. N. Rabotnov (SSSR), on plasticity by B. Onat (USA),-on
the state of reinforced concrete shells by K. Johansen (Dermark),,and on.construc-
tion problems by F. Levi (Italy). Though a strictly theoretical approach to thq
problems was attempted,ithe numerically predominant group of engineers made it
necessary to divide the context into three sections of theoretical considerations
and two dedicated to the actual problems arising inreinforced concrete structures.-.
Card 113

ACCESSION NR; ).?4013736
I-latters'related'to therm6elasticity may have been relegated to the realm of the
Classical theory but were included in the program, possibly because of the great
interiest displayied in this subject by tho Polish scientists. Lxact equations of
theriaoldynamics, iiealing simultanebusly with the thermal influences on deformations
and *ith the influences~of elastic daformations.on the temperature field were not
presented. Problems on,dynamics (~elaLed to fast and intensive heating) were well,"
exeniblified in the work of Ch. Hsiu and P. N&Sdi (USA),v dealing with the distribu-J,
tion%of thermoelastic wives in a conical shell. Problems of linear cohesion
occupied the section on cohesion and creep. Thoory of equilibrium in shells made
ofL plastic materials.has a tendency of passing into the realm of the.classics and
is undergoing, a gradual development. It was well illustrated in the work of J.
Rykhlevski (Poland), dealing with the state -of helicoidal shells. It was noted
that the theory of shells is based on some kinematic hypotheses on the one hand
and'on the theoiry of plasticity and elasticity on the bther. Thesymposium
haracS
p~royed the predbnt'need for developina nonclassical tendencies in the mec
of solid state. The greatest efforts in this direction are being undertakenin
the USA, which-pent a large delegation. The SSSR is also attacking the problem
alon'. a broad front., &ndLour publications 'on the theories-of equilibrium mid of
creep are steadily growing in numper.
Card ~13

:r~L_ -4-
__62490-Z _._7:-EFF 6) 1-*'Sw U) /WP NO* (10 jW Y'
M/
-AJCG -HAt- AP501863S
ioN
AUTHORt Rabotnove Yue Ni, (Acadealcian)
7'qi THIS iMechanion'of solid bodies and polymor.mat
-no* -3
SOUMEt AN SSSR Vestidkj t) 3~6~j jj
-TOPIC TAGSt deformation -rate -continimm -k
creep mechanismg shell theory., elastic plastic:,theox7
-ABnRACT: The various aspects 0
of q nti~iuum~ mechanics as applied to solid bodies.
and polymers are reviewed, Two,trends are observed in the investigation of Aid
so

-I . . . -
- . , - : . I , , I. ~ I, ~ --. -,., ;- ': , - -. ~.~ . - I.: I ~ I . - ,*. ~ 1 ,'- -,. .
-Is- - ---7 1 --, , r , - ~- -,: - ~
. -- ":, - 1, --'- -- - ''. -
t'-- :I.- I - I . , . : . ~,.~,: , ~ , .

-M(m)1EWP(v)/T/9WP(t) JD/HW
14948 SOURCE CODE: UR/0207/65/000/001/0141/0159
otnov YU 14 sibirsk)
rimental data or creep of engineering alloys and phenomenological theoriiij
eview)
al prikladnoy rekhaniki i toidmicheskoy-fiziki, no, it 1965, 141-159
creep,-heat resistant alloy, material deformation.,
_'inbluain"g
The article iq a review of the experimental data available#.
ed by -the author, on the problem of creep and creep"failure in engineering
most all the experimental materialavailable.is in the form of curves
ormation, as a function of time at constant load. These curves have three
an unstabilized creep section at the beginning, a stabilized creep section
t rate, and an accelerated creep section which prededes-failure. In the.A
of a creep theory applicable to building.technology a conventional creep-.7,
greatest stress for which the creep does not exceed a presetvalue, must
ince modern heat-resistant alloys may.fail at deformations of less than
mit must be low. Three types of creep, corresponding to the three port--:: :
3 curves mentioned above, must be contended with. Creep varies,in a comp-_._
i with- temperature... The two principle ways of dealing__y~#~_~~~abi3.ized~'.....

L 24o08-66

L 29693-66 EWP(k)ZEWT(d)ZEYIT(m)/T/Bqp(w)/ENP(V)Iap(t)/Erl- - IR(c)- - ERAW/J-D
ACC NR. AP6015606 SOURCE CODE: UR/bo2o/66A68/bo2/0300/0303
AUTHOR: Rabotnov, Yu. N. (Academician)
-ORG: State Scientific Research Institute of Machine Sciences (Gosudars. nMy
nauchno-insledovatellskiy institut mashinovedenlya)
TITLE: Variation equationof steady state creep in shells
SOURCE: AN SSSR. Doklac7y,, v. 268, no* 2p 19669 A-303
TOPIC TAGS: variational method., shell theorys, creep.-elastic stress,, deformtIon
rate,
ABSTRACTs Variational principles are applied t6 the theory of stea("tate greep
in shell structures* The given creep equations are written as
(rij, j + Fj 0;
oij OU ft);
V,
j U4
'/s(ui,j + *
ij
and then expressed by,the functional, after the zarmw of Roissner,
Card 1/42

ACC Nks Ap6015606
+
46r
The corresponding expression for a shell under a normal Pressure q and nmmal
velocity component an the surface vn is given by
"'Z's IdS.'
(via. + rsh + 4- 4W
A variation on this functional along x~ and leade to the results
2
Y3
2 To no) +
and
+
The Sam technique is applied to a a- nt sylladricmashoU %diere It,
is shown that this variational principle can lead to a stability anal"Is for the
shell, Orig, art, has: 19 eqmationg,
SUB COEE: 20/ SUBH DATE: 27Jad)6/ ORIG PJW a 005/ M RIWo 003
Card 2/12

ACC NRs AP7003635 SOURCE CODE: UR/0380/67/OOC)il()-01700-9876-1-01-
AUTHORS; Rabotnov, Yu. X. (Moscow); Sinayskiyp V. X. (Moscow); Stepanychov, Ye, 1.
omoscow)
ORG: none
TITLE:. A study of kinetics of the disintegration process of glass-reinforced plastic
SOURCE: MashinovedeniYe..,no. 19 1967,9 96-101
TOPIC TAGS.- Asolid kinetics, reinforced plastico resin, tube, film, lens objectivei
photoapparatus, polyester plastic, plastic deformation, performance test / No. 21
resin, PN-3 polyester, Zenit phatoopparatus, Industar 22 lens objective, BSV-2
radiation tube, RT-5 X-ray fi3A
ABSTRACTa Kinetics of the disintegration process of glass-reinforced plastics bas6d
on resin No. 21 and on unsaturated polyester FS-3 (cold set) has been studied using
transmitted light photography and absorption microroentgenography. The apecimens
(30-mm wide rectangular strips) were cut from a sheet (0,6 mm thick) prepared rrom a
single layer of fiber. The first study method, employing photoapparatus "Zenit"
I with objective "Industar 22," w&3 used to investigate the development of cracks JLn
the binder. The photographs were taken of specimens stretched at known load'
increments. X-ray diffraction study of the same specImen, after removal of the load
i conducted in tho characteristic radiation 9" a cap saode at 1-9 v ia3"ng
wa, per k
Card 1/2 -UDC 1-666.678.023

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