Analysis of Mechanical Yield Behavior and Constitutive Response of MMC

    Volume 21, Issue 4 (October 1999)

    ISSN: 0884-6804

    CODEN: CTROAD

    Page Count: 9


    Newaz, GM
    Wayne State University, Detroit, Michigan

    Zhang, K
    Wayne State University, Detroit, 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.


    Paper ID: CTR10983J

    DOI: 10.1520/CTR10983J

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    Author
    Title Analysis of Mechanical Yield Behavior and Constitutive Response of MMC
    Symposium , 0000-00-00
    Committee D30