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本文将复合材料细观力学和复合材料微裂纹损伤理论与直接测试方法结合起来，在一次加载条件下直接测得复合材料结构件的弹性常数和损伤变量随外载的变化规律，从而可避免直接测试方法的多次加载的困难。由碳纤维／环氧复合材料圆筒壳的轴压实验的直接测试所得结果比较合理，表明该方法是合理可靠的，特别是在加载条件下直接测得复合材料结构件的损伤发展规律之后，可将复合材料微裂纹损伤理论直接用于工程结构件的动态损伤监测。
In this paper, the theory of meso-mechanics of composites and microcrack damage of composites are combined with the direct test method to directly measure the elastic constants of composite structural members and the variation rules of damage variables with external load under a single loading condition so as to avoid direct Multiple loading methods for test methods. The direct test results of the axial compression test of carbon fiber / epoxy composite cylindrical shell are reasonable, which shows that the method is reasonable and reliable. Especially under the loading conditions, the damage development regularity of the composite structure can be measured directly The theory of microcrack damage in composites is directly applied to the dynamic damage monitoring of engineering structures.