Journal
INTERNATIONAL JOURNAL OF PLASTICITY
Volume 21, Issue 2, Pages 321-351Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2003.12.003
Keywords
subloading surface model; constitutive behavior; elastic plastic material; stability and bifurcation
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An elastoplastic constitutive equation capable of describing the tangential-plastic strain rate induced by the component of stress rate tangential to the subloading surface, called the tangential-plastic stress rate, is proposed based on the subloading surface model [J. Appl. Mech. (ASME) 47 (1980) 266]. Here, the novel tangential-yield surface and the novel tangential-loading criterion are incorporated for the tangential-plastic strain rate. The equation is capable of describing the deformation behavior with the smooth elastic-plastic transition. Based on the equation, a constitutive equation for metals is formulated, its mechanical features are examined and some basic responses are compared with test data. (C) 2004 Elsevier Ltd. All rights reserved.
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