共晶复合陶瓷损伤过程的有限元分析

The Finite Element Analysis on the Damage Process of Eutectic Composite Ceremic

针对共晶复合陶瓷的微观结构特征,建立了含强约束界面相的有限元模型,模拟了包含片状夹杂共晶复合陶瓷材料的外载应力场分布规律;应用ANSYS的APDL语言进行编程,对材料的损伤过程进行了研究。结果表明材料的破裂由基体损伤决定,随着外载荷的增加,损伤破坏沿界面延伸,并逐渐向基体内部扩展,最终造成基体的断裂。

According to microstructures in eutectic composite ceremic,the finite element model of composite with strong constraining interphase is established.The mechanical stress field of eutectic composite ceremic containing lamellae is simulated.APDL programming in ANSYS is used to analyze the damage process of eutectic composite ceremic.Results show that the failure of eutectic composite ceremic is determined by the damage of matrix.As load is increasing,the damage will elongate along the interphase and extend to the interior of matrix,and in the end the damage causes matrix fracture.