アルミナ/SiCセラミックス複合材における酸化反応誘起型自己治癒挙動の有限要素解析

抄録

To facilitate the use of self-healing ceramic materials in mechanical components, a novel numerical simulation method, which can be applied to non-prescribed damage processes, is desired. In this study, we develop a constitutive model to analyze both damage and self-healing processes of self-healing ceramic materials. Specifically, we formulate a self-crack-healing constitutive model for composites of alumina/SiC. An evolution rule for a damage recovery based on the oxidation kinetics is introduced into the conventional isotropic damage model. The proposed constitutive model therefore can describe not only damage process, but also the self-healing process. Then, we apply the proposed model to FEM analysis and its effectiveness is examined though the comparison with the experiment of alumina/ 30 vol.% SiC.