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RESEARCH PAPERS

Anisotropic Distortional Yield Model

[+] Author and Article Information
George Z. Voyiadjis, Mehrdad Foroozesh

Department of Civil Engineering, Louisiana State University, Baton Rouge, LA 70893

J. Appl. Mech 57(3), 537-547 (Sep 01, 1990) (11 pages) doi:10.1115/1.2897056 History: Received June 22, 1988; Revised April 24, 1989; Online March 31, 2008

Abstract

A yield surface model is proposed in this work which may be adapted to both small strain and large strain offset definitions of yielding. The proposed anisotropic distortional yield model is capable of translation, uniform expansion or contraction, as well as distortion of the subsequent yield surface. Two versions of the proposed model are introduced through variations in fourth-order anisotropy tensor M of the yield surface. Experimental observations by Phillips and co-workers (1973, 1974, 1977, 1979, 1985), Helling et al. (1986), and Stout et al. (1985) are taken into consideration in the development of the proposed model. The corresponding fourth-order elastoplastic stiffness matrix is formulated and specific examples are given.

Copyright © 1990 by The American Society of Mechanical Engineers
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