A General Orthotropic von Mises Plasticity Material Model With Mixed Hardening: Model Definition and Implicit Stress Integration Procedure

Autor:	Miroslav Zivkovic, Nenad Grujovic, Milos Kojic, Radovan Slavković
Rok vydání:	1996
Předmět:	Mechanics of Materials Mechanical Engineering Numerical analysis Hardening (metallurgy) Applied mathematics Tangent von Mises yield criterion Plasticity Strain hardening exponent Condensed Matter Physics Orthotropic material Mathematics Plane stress
Zdroj:	Journal of Applied Mechanics. 63:376-382
ISSN:	1528-9036 0021-8936
DOI:	10.1115/1.2788875
Popis:	A general orthotropic von Mises plasticity model, with an extension of the Hill’s yield criterion to include mixed hardening, is introduced in the paper. Material constants and equivalent stress-equivalent plastic strain curves are defined in a way to suggest their experimental determination. The model represents a special case of a general anisotropic metal plasticity model proposed by the authors. An implicit stress integration procedure, representing an application of the governing parameter method (GPM) introduced by the first author, is presented. The GPM is briefly described, and the computational procedure, together with calculation of the consistent tangent moduli, are given in some detail for a general three-dimensional deformation, with direction of application to plane stress/shell conditions. Numerical examples illustrate applicability of the model and effectiveness of the computational algorithm.
Databáze:	OpenAIRE
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