Development of a dynamic constitutive model with particle damage and thermal softening for Al/SiCp composites

Abstract

A dynamic constitutive model of Al/SiCp composites can not only promote the application of composites in frontier fields, but also guarantee the reliability of the simulation modeling and analytical modeling of the composites. However, the influence of particles damage and thermal softening has not been considered in the dynamic constitutive model of Al/SiCp composites established so far. Therefore, a dynamic constitutive model of Al/SiCp composites with particle damage and thermal softening was established based on the Weibull statistical distribution, the Eshelby equivalent inclusion method, and the constitutive relation of the Al matrix. Then, this dynamic constitutive model was verified. The verification results indicated that the dynamic constitutive model with particle damage and thermal softening was able to predict the dynamic compressive behavior of various Al/SiCp composites accurately. In addition, theoretical calculations of the parameters of the dynamic constitutive model were analyzed to reveal the effect of particle damage and thermal softening on the dynamic compressive behavior. The result shows that an increase in the probability of particle damage in Al/SiCp composites reduces the strengthening effect of the particles. An increase in temperature enhances the fluidity of the matrix, and the dynamic compressive behavior of the Al/SiCp composite gradually became closer to those of tough matrix materials.