Rate-dependent constitutive modelling and micro-mechanical analysis of fibre-reinforced metal-matrix composites

摘要

A rate-dependent-elastic-plastic constitutive model is presented which was implemented into a finite element code. As an illustration, this model is used in a micro-mechanical analy- sis of a fibre-reinforced metal matrix composite laminate. The matrix (a titanium alloy) is a rate-dependent material while the fibre behaves elastically. The residual stresses due to mismatch of the thermal expansion of the matrix and fibre are determined first. The three-dimensional finite element prediction of the representative volume element, which includes a debonding criterion, is found to be in good agreement with the experimental data in the linear and nonlinear regimes as well as the unloading part of the stress-strain curve.