Numerical simulation of crack propagation in ceramic materials at high temperature

Abstract

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Ceramic Materials have been widely used in many fields of engineering, It is necessary to research the process of crack propagation of ceramic materials at high temperature by numerical simulation. The numerical model is applied to investigate the formation, extension and coalescence and crack propagation in ceramic materials at high temperature. A numerical model of ceramic materials is proposed to investigate thermally-induced damage and crack propagation at high temperature. The numerical simulations show that when the tensile stress exceeds its phase transition threshold, it produces tensile failure, in the specimen surface more and more the impact cracks are appear, the crack spacing’s are basically equal and parallel to each other, with the elapse of time, the main cracks continue to expand, small part of the cracks expansion are subjected to limited, there are the classifications of cracks. With the elapse of time, crack propagation speed gradually slows down, and eventually reaches a steady state. The numerical simulation demonstrates that the model proposed can visually replicate the thermal cracking propagation process of ceramic materials at high temperature. The result of our numerical simulation shows that thermal cracking propagation process in ceramic materials at high temperature is in good agreement with the real experimental thermal cracking result of crack propagation in ceramic materials at high temperature.