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将跨尺度失效理论(Micro-Mechanics of Failure,简称“MMF”)、加速试验方法(Accelerated Testing Methodology,简称“ATM”)和渐进损伤分析(Progressive Damage Analysis,简称“PDA”)三种方法相结合,提出了一种可以预测复合材料长期寿命和失效过程的分析方法。对MMF失效准则进行改进,区分了基体拉伸和压缩细观失效模式。建立了MMF/ATM/PDA方法有限元计算流程,并在ABAQUS中使用用户自定义材料(UMAT)实现。通过对不同温度下复合材料纵向和横向单向板的拉伸、压缩试验测得静载和疲劳寿命,得到复合材料MMF/ATM细观临界值。采用MMF/ATM/PDA方法对准各向同性开孔板压缩长期寿命进行了预测,并对破坏过程进行了模拟,分析了纤维和基体的失效过程。试验结果和预测结果吻合良好,验证了方法的合理性。
The Micro-Mechanics of Failure (“MMF”), Accelerated Testing Methodology (“ATM”) and Progressive Damage Analysis (“PDA” ), A new analytical method that can predict the long-term life and failure process of composite materials is proposed. MMF failure criterion is improved to distinguish between the matrix tensile and compressive meso-failure modes. The MMF / ATM / PDA method finite element calculation flow was established and implemented in ABAQUS using user defined material (UMAT). The MMF / ATM meso-critical values of the composites were obtained by measuring the static load and the fatigue life of the uniaxial tensile and compression tests of the composite longitudinal and transverse plates at different temperatures. The MMF / ATM / PDA method is used to predict the long-term compression life of isotropic perforated plates. The failure process is simulated and the failure process of fiber and matrix is analyzed. The test results are in good agreement with the prediction results, which verify the rationality of the method.