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A numerical model for predicting crack path and modes of damage in unidirectional metal matrix composites
Journal article   Peer reviewed

A numerical model for predicting crack path and modes of damage in unidirectional metal matrix composites

J. G. Bakuckas, T. M. Tan, A. C. W. Lau and J. Awerbuch
Journal of reinforced plastics and composites, v 12(3), pp 341-358
01 Mar 1993
DOI: https://doi.org/10.1177/073168449301200307

Abstract

COMPOSITE MATERIALS
A finite element-based numerical technique has been developed to simulate damage growth in unidirectional composites. This technique incorporates elastic-plastic analysis, micromechanics analysis, failure criteria, and a node splitting and node force relaxation algorithm to create crack surfaces. Any combination of fiber and matrix properties can be used. One of the salient features of this technique is that damage growth can be simulated without pre-specifying a crack path. In addition, multiple damage mechanisms in the forms of matrix cracking, fiber breakage, fiber-matrix debonding and plastic deformation are capable of occurring simultaneously. The prevailing failure mechanism and the damage (crack) growth direction are dictated by the instantaneous near-tip stress and strain fields. Once the failure mechanism and crack direction are determined, the crack is advanced via the node splitting and node force relaxation algorithm. Simulations of the damage growth process in center-slit boron/aluminum and silicon carbide/titanium unidirectional specimens were performed. The simulation results agreed quite well with the experimental observations.

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3 citations in Web of Science
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Web of Science research areas
Materials Science, Composites
Polymer Science
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