The fracture behavior of ultra-high temperature ceramic matrix composites at high temperature has received increasing attention. However, few studies consider the effect of particle/crack interaction on the high temperature fracture strength of materials. In this work, the effect of particle/crack interaction is introduced into temperature-dependent fracture strength model of monolithic ultra-high temperature ceramic matrix composites, which also considers effects of flaw size, grain size, and residual thermal stress. Furthermore, by considering the influence of laminated structure, a theoretical model of the temperature-dependent fracture strength of laminated ceramic matrix composites is developed. The effect of particle/crack interaction is also included in this model. It should be noted that the predictions of models agree well with the experimental data of both monolithic and laminated materials without using any fitting parameters. The effect of particle/crack interaction is found to have a significant weakening effect on the strength of materials at different temperatures.

中文翻译：

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整体和层压超高温陶瓷基复合材料断裂行为的温度依赖性表征

超高温陶瓷基复合材料在高温下的断裂行为越来越受到关注。然而，很少有研究考虑颗粒/裂纹相互作用对材料高温断裂强度的影响。在这项工作中，颗粒/裂纹相互作用的影响被引入到整体式超高温陶瓷基复合材料的温度相关断裂强度模型中，该模型还考虑了缺陷尺寸、晶粒尺寸和残余热应力的影响。此外，通过考虑层状结构的影响，建立了层状陶瓷基复合材料的温度依赖性断裂强度理论模型。粒子/裂纹相互作用的影响也包含在该模型中。应该注意的是，在不使用任何拟合参数的情况下，模型的预测与单片材料和层压材料的实验数据吻合得很好。发现颗粒/裂纹相互作用的影响对材料在不同温度下的强度具有显着的削弱作用。