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根据增量形式的虚功原理和单层板理论,推导了基于温度环境下复合材料层合板的应力分析公式,结合逐渐损伤分析理论,建立了考虑温度影响的复合材料层合板的逐渐损伤强度分析方法.在此基础上,对含孔复合材料层合板在22,80,120℃下的拉伸失效过程进行预测,与80℃和120℃下的试验结果相比,预测强度值的最大误差为-2.28%.研究表明:随着温度的升高,含孔复合材料层合板的初始纤维损伤强度和破坏强度逐渐降低,而其初始基体损伤强度逐渐增大.
Based on incremental virtual work principle and single-plate theory, the stress analysis formula of composite laminates based on temperature environment is deduced. Based on the gradual damage analysis theory, the gradual damage strength analysis of composite laminates considering temperature is established On the basis of this, the tensile failure process of porous composite laminates at 22, 80 and 120 ℃ is predicted, and the maximum error of predicted intensity is -2.28 compared with the test results at 80 ℃ and 120 ℃ The results show that with the increase of temperature, the initial fiber damage strength and fracture strength of the composites with holes gradually decrease, while the initial matrix damage strength gradually increases.