An elasto-plastic constitutive model for unidirectional fiber reinforced metal matrix composites

摘要

A statistical constitutive model, which takes account the effect of strain rate, was presented to describe the stress-strain relationship of unidirectional fiber reinforced metal matrix composites (UFRMMC). To verify its reliability, tensile tests on a unidirectional SiC/Al composite wire, were carried out at different strain rates, and the stress-strain curves were obtained. The testing results show that both the strength and ductility of the composite wire all increase with increasing strain rate. Simulated stress-strain curves, derived from the constitutive model, fit the tested results well, which indicates that the model is valid and reliable.