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Thermal aspects of shear localization in microporous viscoplastic solids
Author(s) -
Zavaliangos A.,
Anand L.
Publication year - 1992
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.1620330308
Subject(s) - viscoplasticity , microporous material , shear (geology) , materials science , thermal , mechanics , composite material , structural engineering , physics , thermodynamics , constitutive equation , engineering , finite element method
A set of phenomenological state variable constitutive equations for large deformations of isotropic, thermo‐elasto‐viscoplastic, porous materials is considered, and a new semi‐implicit, incrementally objective time‐integration procedure for these constitutive equations is developed. The constitutive equations and the time‐integration procedure are implemented in a finite element program, and used to study the shear band formation and ductile fracture initiation triggered by flow softening due to the combined effects of void growth and deformation heating, in a plane strain tension test.