Shear band development predicted by a non-normality theory of plasticity and comparison to crystal plasticity predictions

Citation
M. Kuroda et V. Tvergaard, Shear band development predicted by a non-normality theory of plasticity and comparison to crystal plasticity predictions, INT J SOL S, 38(50-51), 2001, pp. 8945-8960
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
ISSN journal
0020-7683 → ACNP
Volume
38
Issue
50-51
Year of publication
2001
Pages
8945 - 8960
Database
ISI
SICI code
0020-7683(200112)38:50-51<8945:SBDPBA>2.0.ZU;2-C
Abstract
A phenomenological plasticity model has recently been proposed, which combi nes a smooth yield surface for an anisotropic solid with a vertex-type plas tic flow rule. Both polycrystal plasticity calculations and experiments hav e shown the type of non-normality of plastic flow, which is represented by this material model. The plasticity model is here implemented in a finite e lement programme and is used to analyze the plane strain tensile test, thus representing the formation of a neck and the subsequent evolution of shear bands in the neck region. To test the predictions of the phenomenological plasticity model the tensile test problem is also analyzed by polycrystal p lasticity, based on the Taylor model for either b.c.c. or f.c.c. crystal st ructure. It is shown that the phenomenological plasticity model gives a goo d approximation of the crystal plasticity predictions. (C) 2001 Elsevier Sc ience Ltd. All rights reserved.