Shear-lag model for a single fiber metal matrix composite with an elasto-plastic matrix and a slipping interface

S. Mahesh*, J. C. Hanan, E. Üstündag, I. J. Beyerlein

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

We present a shear-lag stress analysis methodology which accounts for both matrix strain-hardening plasticity and interfacial slip in a single fiber metal matrix composite (MMC) subjected to uniaxial tensile loading and unloading along the fiber direction. The fiber may either be broken or intact. Among other things, the model predicts residual stress and strain distribution after a cycle in the fiber and matrix. The development of the model is motivated by the recent measurement by Hanan et al. [Mater. Sci. Eng. A, in press], of elastic strain evolution with loading in each phase of an Al2O3/Al composite using neutron diffraction. The model also estimates two crucial in situ material parameters using these measurements, which cannot be obtained from bulk tests: the frictional threshold of the interface, and the in situ yield point of the matrix. With these parameters, the predicted elastic strain evolution with loading is in excellent agreement with the experimental data.

Original languageEnglish
Pages (from-to)4197-4218
Number of pages22
JournalInternational Journal of Solids and Structures
Volume41
Issue number15
DOIs
Publication statusPublished - Jul 2004
Externally publishedYes

Funding

This study was supported by the National Science Foundation (CAREER grant no. DMR-9985264) at Caltech and a Laboratory-Directed Research and Development Project (no. 2000043) at Los Alamos.

FundersFunder number
National Science Foundation

    Keywords

    • Damage mechanics
    • Interfacial slip
    • Matrix plasticity
    • Metal matrix composites
    • Shear-lag model

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