Abstract
A model to assess the damage evolution due to reinforcement fracture was developed for particulate-reinforced metal-matrix composites subjected to cyclic deformation. The composite mechanical response was simulated by means of the finite element analysis of a unit cell and the stresses on the reinforcements were used to calculate the fraction of broken reinforcements by assuming that the reinforcement strength followed the Weibull statistics. The predictions of the model (the fraction of broken reinforcements and the cyclic stress-strain curve) were compared with the experimental observations on a 2618 Al alloy reinforced with 15 vol% SiC particulates.
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