中文摘要：

加筋板在出现屈曲之后并未完全失效，仍然具有较高的承载能力。本研究利用ABAQUS软件建立由shell—solid单元组合的复合材料加筋板极限承载能力分析模型。复合材料层合板和界面材料的破坏通过子程序判断，子程序中编写了Hashin和Quads失效判据，并引入材料刚度退化准则。通过有限元模拟方法分析复合材料加筋板在轴向压缩载荷下的极限承载能力，并详细给出3种失效模式的破坏过程，仿真结果与试验结果相比误差较小，说明所建立模型及USDFLD程序是正确的。

英文摘要：

The stiffened composite panels still have enough strength after the bucking, the study of the ultimate strength is very necessary. A shell-solid finite element model is built by using ABAQUS software to analyze the ultimate strength. In the model, user subroutine is led into the analysis of the failure of materials. In the user subroutine, Hashin failure criteria and Quads failure criteria are programed to identify the damage occurrence, and the degradation criterion is used to simulate the failure progress of stiffened composite panels. The processes of three failure modes are discussed in detail. The error of simulation result compared with the experimental data is very small, it is shown that the proposed method is correct.