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RESEARCH PAPERS

Monte Carlo Simulation of Particle-Cracking Damage Evolution in Metal Matrix Composites

[+] Author and Article Information
H. T. Liu

Department of Civil and Environmental Engineering and Center for Computer-Aided Design,  The University of Iowa, Iowa City, IA 52242-1527 and Department of Civil and Environmental Engineering,  University of California, Los Angeles, Los Angeles, CA 90095-1593

L. Z. Sun1

Department of Civil and Environmental Engineering,  The University of Iowa, Iowa City, IA 52242-1527lizhi-sun@uiowa.edu

H. C. Wu

Department of Civil and Environmental Engineering,  The University of Iowa, Iowa City, IA 52242-1527lizhi-sun@uiowa.edu

1

Corresponding Author. Tel.: 319-384-0830; Fax: 319-335-5660.

J. Eng. Mater. Technol 127(3), 318-324 (Mar 10, 2005) (7 pages) doi:10.1115/1.1925291 History: Received September 28, 2004; Revised March 10, 2005

In the modeling of microstructural damage mechanisms of composites, damage evolution plays an important role and has significant effects on the overall nonlinear behavior of composites. In this study, a microstructural Monte Carlo simulation method is proposed to predict the volume fraction evolution of damaged particles due to particle-cracking for metal matrix composites with randomly distributed spheroidal particles. The performance function is constructed using a stress-based damage criterion. A micromechanics-based elastoplastic and damage model is applied to compute the local stress field and to estimate the overall nonlinear response of the composites with particle-cracking damage mechanism. The factors that affect the damage evolution are investigated and the effects of particle shape and damage strength on damage evolution are discussed in detail. Simulation results are compared with experiments and good agreement is obtained.

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Copyright © 2005 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic diagram of microstructures of PRMMCs. (a) Initial state (undamaged); (b) particle cracking.

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Figure 2

Schematic diagram of spheroidal particles aligned in the x-direction; the aspect ratio α is defined as a1∕a2

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Figure 3

The parametric analysis of the effect of the uncertainty of matrix properties on the cracking evolution (a) the effect of the Young’s modulus; and (b) the effect of the Poisson’s ratio

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Figure 4

The parametric analysis of the effect of the uncertainty of particle properties on the cracking evolution (a) the effect of the Young’s modulus; and (b) the effect of the Poisson’s ratio

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Figure 5

The parametric analysis of the effect of the uncertainties of (a) the aspect ratio and (b) the critical stress on the cracking evolution

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Figure 6

The effect of the average values of (a) the aspect ratio and (b) the critical stress on the cracking evolution

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Figure 7

The comparison of the damage evolution between the MC simulation and the experimental results (4)

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