Modelling the mechanical behavior of ZTA composites under dynamic loading

Abstract

This paper presents a physical and mathematical model that has been developed in the framework of the approach used in the computational mechanics of materials. The model is designed to enable the study of the patterns of deformation and fracture of ceramic composites with a transformation-hardened matrix at the mesoscopic and macroscopic levels under intense dynamic loading. The influence of the loading rate on the formation of the fracture and energy dissipation fronts for composite materials based on the Al2O3-20%ZrO2 system is shown. Nonlinear effects in the considered composites under intense dynamic loading are associated with the processes of the self-organization of structural fragments at the mesoscopic level, as well as with the occurrence of martensitic phase transformations in the volumes of the strengthening particles. In this paper, specific destruction work is used as the main parameter that determines the contribution of each composite component to the destruction work.