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AN ANALYTICAL STUDY OF VOID GROWTH IN VISCOPLASTIC SOLIDS
Author(s) -
Mohan,
Brust
Publication year - 1998
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1046/j.1460-2695.1998.00055.x
Subject(s) - void (composites) , viscoplasticity , materials science , creep , mechanics , cavitation , finite element method , linear elasticity , composite material , structural engineering , constitutive equation , engineering , physics
Detailed numerical analyses are conducted to examine the effect of material elasticity and non‐linear shape changes on void growth in viscoplastic solids. Numerical simulations are carried out under constant stress as well as cyclic loading conditions. The material response is assumed to be elastic‐non‐linear viscous (power law creep). Analyses of void growth are conducted assuming creep‐controlled mechanism. The role of finite geometry changes in understanding cavity growth under balanced strain‐controlled cyclic loading is also explored. The results indicate that while elastic accommodation does not influence void growth, non‐linear shape changes of the voids significantly affect their growth characteristics. It is also shown that while grain boundary voids can grow under balanced strain cyclic loading when the accompanying shape changes are accounted for, they can either shrink or grow under load‐controlled cycling depending on the loading frequency.