The fracture strain of discontinuously reinforced metal matrix composites (
DRMMCs) is studied according to a damage mechanics model proposed by McClin
tock, with a localized crack propagation hypothesis and particle-related cr
ack initiation mechanism. An estimation equation is proposed. The estimated
results are verified with the data available in the literature and those m
easured on some types of DRMMCs obtained by powder metallurgical techniques
. The experimental results show good agreement with the estimation model.