复合材料整体加筋板轴压后屈曲失效表征

应用商业有限元软件ABAQUS中的内聚单元,对后屈曲诱发的复合材料整体加筋板的缘条/蒙皮界面的失效进行了分析。基于有限元结果,提出了缘条/蒙皮界面内力的提取方法并研究了其变化规律。为了研究缘条/蒙皮刚度比对界面失效的影响以及失效时界面内力之间的关系,以缘条厚度为参数进行参数化建模,给出了界面脱胶的失效准则和失效包线。最后对缘条/蒙皮厚度比和刚度比提出了设计建议。

Post-buckling failure characterization of an integrated stiffened composite panel under uniaxial compression

The post-buckling induced failure process was simulated by using the cohesive element in the commercial software ABAQUS. The internal forces on the flange/skin interface were extracted from FEM results, and then their features were studied. The flange thickness was considered as a parameter to build a parameterized model for studying the effect of stiffness ratios of the flange to the skin on the interface debonding. The relationship among each component of the internal forces was also investigated. Failure criteria and failure envelops were developed for the flange/skin interface debonding. Finally the design parameters of the thickness ratio and the stiffness ratio between the flange and the skin were suggested for the design.