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Developing a stochastic model to predict the strength and crack path of random composites

✍ Scribed by Hunain Alkhateb; Ahmed Al-Ostaz; Khalid I. Alzebdeh

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 955 KB
Volume: 40
Category: Article
ISSN: 1359-8368
DOI: 10.1016/j.compositesb.2008.09.001

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✦ Synopsis

We characterize fracture and effective stress-strain graphs in 2D random composites subjected to a uniaxial in-plane uniform strain. The fibers are arranged randomly in the matrix. Both fibers and matrix are isotropic and elastic-brittle. We conduct this analysis numerically using a very fine two-dimensional triangular spring network and simulate the crack initiation and propagation by sequentially removing bonds which exceed a local fracture criterion. In particular, we focus on effect of geometric randomness on crack path of random composites. Based on that two stochastic micro-mechanic models are presented that can predict with confidence the failure probability of random matrix-inclusion composites.

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