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由于复合材料的脆性、弹性和强度等性能参数的各向异性的特性,使得其无论是静载分析还是疲劳分析均比金属材料的分析复杂;层合板的层间特性和疲劳分析中材料性能的退化,更是加剧了问题的复杂性。应力分析的准确性、失效准则的合理性及材料性能退化准则的客观性,为数值模拟方法的可行性及其结果的可信性奠定了基础。
Due to the anisotropic properties such as brittleness, elasticity and strength of composites, the static analysis or fatigue analysis are more complicated than the analysis of metal materials. The interlaminar properties of laminate and the properties of materials in fatigue analysis Degradation exacerbated the complexity of the problem. The accuracy of the stress analysis, the rationality of the failure criterion and the objectivity of the material performance degradation criterion lay the foundation for the feasibility of the numerical simulation method and the credibility of the results.