ISSN: 0884-6804
CODEN: JCTRER
Page Count: 9

Analysis of Mechanical Yield Behavior and Constitutive Response of MMC
Newaz, GM
Wayne State University, Michigan

Zhang, K
Wayne State University, Michigan

(Received 10 November 1997; accepted 13 July 1999)

Abstract

An effective stress function utilizing the J² theory, which includes plasticity and damage, was investigated to predict the monotonic response of metal matrix composite (MMC). The damage considered was in the form of debonding between fiber and matrix and plasticity in the form of slip bands in the matrix. Yield surfaces were generated with consideration of both damage and plasticity in effect. The computational micromechanics analysis involved a unit cell model utilizing the ABAQUS code for analysis. The constitutive response predictions from the J² model were compared with experimental results from monotonic unidirectional loading for transverse tension, compression, longitudinal tension, and pure shear. The finite element analysis estimated apparent yield points at a variety of combinations of normal stresses. Both σ¹¹ and σ²² were consistent with the results obtained from the effective stress function, providing a strong basis for the use of the J² theory to account for combined plasticity and damage response of MMCs. Good correlation was obtained between experiments and predictions.

Keywords:
MMC, mechanical yield behavior, constitutive response

Paper ID: CTR10983J
DOI: 10.1520/CTR10983J
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