复合材料的弹性常数与损伤的直接测试

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。

Direct Measurements of Elastic Constants and Internal Damage in Composite Materials

In this paper,the elastic constants and damage evolution laws in composite materials are measured directly under one time loading condition with the assistant of micromechanics of composite materials and microcrack damage theory.The obtained results of the axial compression experiments of carbon Epoxy Composite cylinders are reasonable and reliable ,and the direct measuring results can be convenicntly used to analyse the mechanical behavior and monitor the internal damage development in practical structure composite materials.