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对层合陶瓷基复合材料(CMCs)的应力-应变行为进行了研究。基于多尺度分析方法,实现了由组分性能参数到层合陶瓷基复合材料整体应力-应变的计算。采用可实现单向纤维增强陶瓷基复合材料应力-应变计算的细观力学模型,由材料的细观组分性能计算出单向板的非线性弹性性能,并将单向板的弹性性能作为层合复合材料模型的输入参数,通过有限元法计算层合陶瓷基复合材料的整体应力-应变响应。与试验数据的对比表明:采用该模型可以实现层合陶瓷基复合材料在单调拉伸载荷及拉伸加卸载条件下应力-应变曲线的预测,其中数据的最大偏离为19.61%.
The stress-strain behavior of laminated ceramic matrix composites (CMCs) was investigated. Based on the multi-scale analysis method, the whole stress-strain calculation from the component performance parameters to the laminated ceramic matrix composites was realized. Using the mesomechanical model of stress-strain calculation of unidirectional fiber reinforced ceramic matrix composites, the nonlinear elastic properties of the unidirectional plate can be calculated from the microscopic component properties of the material, and the elastic properties of the unidirectional plate as the layer Combined with the input parameters of the composite model, the overall stress-strain response of the laminated ceramic matrix composites was calculated by finite element method. The comparison with the experimental data shows that the model can be used to predict the stress-strain curve of monolithic ceramic composite under monotonous tensile loading and unloading conditions. The maximum deviation of the data is 19.61%.