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中文摘要：
本文对复合材料斜削结构进行拉伸试验和相应的有限元模拟分析。编制损伤子程序模拟结构内部的损伤。通过对试验数据和数值结果进行对比，数值模拟和试验结果吻合较好。试验和模拟结果显示，由于削层的存在，使得结构更复杂，尤其在过渡段内，各截面的性能不同。通过损伤模拟，预测了三种损伤形式的萌生位置和扩展方向，得出结构首先发生基体损伤，然后是纤维-基体剪切和纤维断裂损伤，基体开裂损伤对斜削结构的影响很小，而纤维-基体剪切和纤维断裂损伤对结构是灾难性的。
英文摘要：
Composite structure with plies drop-off is studied by tensile experiment and FEM in this paper. A user subroutine is added to the FEM to simulate the inner damage of structure. Good agreements between experimental data and numerical results are obtained. From the experiment and FEM simulation results, the composite structure with plies drop-off is very complex. Especially in the transition segment, the properties of every transverse section are different. By the means of damage simulation, the initiation and progression direction of three types damage are predicted. The fracture of matrix occurs at first, fiber-matrix shear and fiber break are founded subsequently. The effect of matrix fracture to structure is very small, but fiber-matrix shear and fiber break are catastrophic to the whole structure.
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