Theoretical investigation of influence of peculiarities of internal structure on deformation and fracture of metal-ceramic composites using discrete element approach

摘要

The paper is devoted to comparative analysis of the capabilities of the most common models of interfaces which are used for simulation of multiphase materials. Influence of the parameters of these models on the microscopic mechanical properties of the metal-ceramic composites was also investigated. It was shown that the most effective way of explicit modeling of interphase boundaries are models of extended (wide) interface area. For example, models of homogeneous interface zones provide the opportunity to study influence of thermal conditions of composite material production and difference between the elastic constants and rheological parameters of different phases on integral properties of the composites. If interphase boundaries are characterized by gradients of elemental composition and defect structure at the transition from one phase to another, is the most adequate to use "gradient" models of the interface zones.