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A modified plasticity theory for porous metals

✍ Scribed by M. S. Gadala; M. L. Mullins; M. A. Dokainish

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
524 KB
Volume
15
Category
Article
ISSN
0029-5981

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✦ Synopsis

Abstract

A plasticity theory for porous metals is proposed. A simple model of a porous materials is analysed by the finite element method. Small strain elastic–plastic analysis provides stress–strain curves, yield stressed and incremental plastic strain vectors for different void ratios. An assessment is made of an existing yield criterion for porous metals. A modified yield criterion and plastic potential function and, consequently, different plasticity equations are given. Reasonable agreement is obtained between the present numerical results and previous results in the literature.

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plasticity theory for sintered porous metals with anisotropic pore structure is proposed. It is assumed that anisotropy of the bulk material and its symmetry group is generated by the pore structure that is described by the structural permeability second-order tensor. In the first part the developme