Study on fracture strain of discontinuously reinforced metal matrix composites

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.