Method for evaluating strength of ceramic-based composite material in reuse environment

A method for evaluating the strength of a ceramic-based composite material in a reuse environment is characterized in that transition from a fatigue damage mechanism to a damage criterion is carried out by using a multi-scale method based on a molecular dynamics simulation method and a mesoscopic finite element simulation method, and the fatigue damage of the ceramic-based composite material in the reuse environment is quantitatively described through damage variables; the method can accurately predict the strength change of the ceramic-based composite material in various repeated use environments (force/heat/oxygen), is suitable for various ceramic-based composite materials, and has universality. 一种重复使用环境下陶瓷基复合材料强度评价方法，基于分子动力学模拟方法、细观有限元模拟方法，利用多尺度方法进行了疲劳损伤机理到破坏准则的过渡，将重复使用环境下陶瓷基复合材料的疲劳损伤通过损伤变量定量描述，能够准确的预测各种重复使用环境下(力/热/氧)陶瓷基复合材料的强度变化，适用于各种陶瓷基复合材料，具有普适性。