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On the crack propagation with variable velocity. 3R
35A
Geomechanics abstracts General Companies, institutes and laboratories
Fracture processes See also abstracts: 390,391,
331 EVANS, I Some thoughts on the nature of ~ research and develolm~mt in the National Coal Board. UN IV.NOTTINGHAM, MINING DEPT.MAGAZINE, V27,197~, P25- 28. The a u t h o r d i s c u s s e s t h e n a t u r e and t h e v a l u e o f r e s e a r c h and t h e d i f f e r e ~ c e s b e t w e e n t h e a t t i t u d e o f t h e s c i e n t i f i c r e s e a r c h worker and t h e e n g i n e e r . The m o t i v a t i o n o f i n d u s t r i a l r e s e a r c h workers i s also d i s c u s s e d .
Books See abstracts: 357,426,~28.
Properties of rocks and soils See also abstract: 431. 332 MARCAL, PV BROWN UNIV.RHODE ISLAND,USA Some current finite el~-~nt models for material b ehaviour. 27R. INT.J .FRACTURE,VII, N~,AUG .1975,P675-676. The current models available for s~m~lating material behavlour are briefly surveyed. Their imPlememtation as a library of material behaviour in a general purpose program is discussed. Auth.
Texture, structure, composition and density
335 SANDHU,RS OHIO STATE UNIV.COLUMBUS,USA HUANG,SW SARGenT AND LUNDY,CHICAGO, ILL.USA Application of Griffith's theory to analysis of progressive fracture. IhF,2T,3~R. INT.J .FRACTURE,VII, NI,FEB .1975,PI07-121. Macroscopic fracture criteria based on the Griffit~ theory and its modification by McCllntock and Welsh are used in con~t~ction with the finite el*mp~t method to simulate progressive fracture in structural el~m~ts. 336 KOSTROV, BV INST.PHYS. EARTH, MOSCOW, SU On the crack propagation with variable velocity. 3R. INT.J. FRACTURE,VII, NI, FEB .1975,Ph7-56 • The plane problem of propagation of a straight crack in an elastic medium under arbitrary variable loading is considered. The locations of the edges of the crack are specified as arbitrary smooth functions of time under the only restriction that crack speed at any instant i~ less than the velocity of Rayleigh wave. The distribution of plane stress co~0onents near the crack tip is obtained and expressions for stress intensity factors at the crack are given.
337 BARBER, JR UNIV .NEWCASTLE. UPON.TYNE, GB The penny-shaped crack in shear and related contact l~Ob lems. 1OR. INT.J.~GNG SCI.,VI3, N9-10,1975, P815-829.
338 BROCK, LM UNIV. K~Lv~KY, LEXINGTON, USA Effects of secondary diffractions on the stress intensity factors generated for a finite crack by a shear wave. 8F,16R. INT.J.~GNG SCI.,VI3,N9.10,1975,P851.859.
333 339 RAMANCHUK,VE SANDRU, N UNIV.BUCHAREST, R SMORODINOV,MI The influence of couple-stresses on singular stress Investigation of the physical properties of soils concentrations in micropolar elastic half-space. 9R. from the viewpoint of their inhom0geneity. INT.J. ~2~GNG SCI. ,Vl3, NT. 8,1975, P631.639. SOIL MECH.FOUND. ~GNG,VI2, N3,1975, P187-190. The anthors discuss the advantages of using the radioiso- 34o tope method for determining physical properties of InhoROOKE~ DP ROY .AIRCR.EST. FARNBOROUGH, GB mogeneous soils. TWEED, J UNIV. GLASGOW, SCOTLAND, GB The stress intensity factor for a crack in a symme334 tric array originating at a circular hole in an ART~MOV, AV infinite elastic solid. 5F, SR. Special features of molecular structure of outburstINT.J. ~ G N G SCI. ,VI3, N7-8,1975, P653-661. prone zones of Donbass seams. In Russian. UGOL, VSO,N!I,NOV .197~,P30-32 • 341 A study has been made of the dielectric c~stant, X-ray KASSIR,MK CITY UNIV.NEW YORK, USA structure and epr characteristics of the coal molecule Thermal stresses in an elastic solid containing a in an attempt to elucidate the mechanism of outbursts. plane crack. 1F,17R. INT.J.~;GNG SCI. ,V13,NT-8,1975,PT03-711.
Geomechanics abstracts General Companies, institutes and laboratories
Fracture processes See also abstracts: 390,391,
331 EVANS, I Some thoughts on the nature of ~ research and develolm~mt in the National Coal Board. UN IV.NOTTINGHAM, MINING DEPT.MAGAZINE, V27,197~, P25- 28. The a u t h o r d i s c u s s e s t h e n a t u r e and t h e v a l u e o f r e s e a r c h and t h e d i f f e r e ~ c e s b e t w e e n t h e a t t i t u d e o f t h e s c i e n t i f i c r e s e a r c h worker and t h e e n g i n e e r . The m o t i v a t i o n o f i n d u s t r i a l r e s e a r c h workers i s also d i s c u s s e d .
Books See abstracts: 357,426,~28.
Properties of rocks and soils See also abstract: 431. 332 MARCAL, PV BROWN UNIV.RHODE ISLAND,USA Some current finite el~-~nt models for material b ehaviour. 27R. INT.J .FRACTURE,VII, N~,AUG .1975,P675-676. The current models available for s~m~lating material behavlour are briefly surveyed. Their imPlememtation as a library of material behaviour in a general purpose program is discussed. Auth.
Texture, structure, composition and density
335 SANDHU,RS OHIO STATE UNIV.COLUMBUS,USA HUANG,SW SARGenT AND LUNDY,CHICAGO, ILL.USA Application of Griffith's theory to analysis of progressive fracture. IhF,2T,3~R. INT.J .FRACTURE,VII, NI,FEB .1975,PI07-121. Macroscopic fracture criteria based on the Griffit~ theory and its modification by McCllntock and Welsh are used in con~t~ction with the finite el*mp~t method to simulate progressive fracture in structural el~m~ts. 336 KOSTROV, BV INST.PHYS. EARTH, MOSCOW, SU On the crack propagation with variable velocity. 3R. INT.J. FRACTURE,VII, NI, FEB .1975,Ph7-56 • The plane problem of propagation of a straight crack in an elastic medium under arbitrary variable loading is considered. The locations of the edges of the crack are specified as arbitrary smooth functions of time under the only restriction that crack speed at any instant i~ less than the velocity of Rayleigh wave. The distribution of plane stress co~0onents near the crack tip is obtained and expressions for stress intensity factors at the crack are given.
337 BARBER, JR UNIV .NEWCASTLE. UPON.TYNE, GB The penny-shaped crack in shear and related contact l~Ob lems. 1OR. INT.J.~GNG SCI.,VI3, N9-10,1975, P815-829.
338 BROCK, LM UNIV. K~Lv~KY, LEXINGTON, USA Effects of secondary diffractions on the stress intensity factors generated for a finite crack by a shear wave. 8F,16R. INT.J.~GNG SCI.,VI3,N9.10,1975,P851.859.
333 339 RAMANCHUK,VE SANDRU, N UNIV.BUCHAREST, R SMORODINOV,MI The influence of couple-stresses on singular stress Investigation of the physical properties of soils concentrations in micropolar elastic half-space. 9R. from the viewpoint of their inhom0geneity. INT.J. ~2~GNG SCI. ,Vl3, NT. 8,1975, P631.639. SOIL MECH.FOUND. ~GNG,VI2, N3,1975, P187-190. The anthors discuss the advantages of using the radioiso- 34o tope method for determining physical properties of InhoROOKE~ DP ROY .AIRCR.EST. FARNBOROUGH, GB mogeneous soils. TWEED, J UNIV. GLASGOW, SCOTLAND, GB The stress intensity factor for a crack in a symme334 tric array originating at a circular hole in an ART~MOV, AV infinite elastic solid. 5F, SR. Special features of molecular structure of outburstINT.J. ~ G N G SCI. ,VI3, N7-8,1975, P653-661. prone zones of Donbass seams. In Russian. UGOL, VSO,N!I,NOV .197~,P30-32 • 341 A study has been made of the dielectric c~stant, X-ray KASSIR,MK CITY UNIV.NEW YORK, USA structure and epr characteristics of the coal molecule Thermal stresses in an elastic solid containing a in an attempt to elucidate the mechanism of outbursts. plane crack. 1F,17R. INT.J.~;GNG SCI. ,V13,NT-8,1975,PT03-711.