The strength of the ceramic matrix composites under the influence of pore is reviewed

Abstract

Ceramic matrix composites with strong structural characteristics, is a kind of multiphase materials. Its mechanical properties and the regularity of damage not only depends on the material properties of components, but also depends on the mesoscopic structure characteristics. Past for reinforcement of composite materials, usually by adding inclusions, makes the interface strength is improved. But as a result of the mixed with non-uniformity, and the preparation process to air and other impurities, makes the substrate near the interface of substrate, in particular, inevitable existence of the pore, pore under external load when the crack and then expand, causing material failure. So by studying the material under external load impact, its performance in the damage evolution of mesoscopic level and macro failure, the relationship between material from the mesoscopic level analysis the rule of damage evolution and fracture mechanism, can not only provide theoretical guidance for the preparation of composite materials, but also through the further optimization of material mesoscopic structure to achieve the purpose of design materials. In this paper, the current ceramic matrix composites, has introduced the preparation of defect, defect cause material damage failure occurred, and the research status of the influence of the effective strength of the composites, the composite material related research achievements and disadvantages, on the basis of combining the simulation modeling analysis method for composite material next effective strength problem research was discussed.