碳纤维增强环氧树脂复合材料加筋板的压缩屈曲特性

摘要

The compression stability of carbon fiber reinforced epoxy resin composite stiffened panel was analyzed by the engineering method and finite element model (FEM)respectively,and the critical buckling load and buckling mode of the stiffened panel were obtained.The experiments on the compression stability of the composite stiffened panel were conducted and the experimental results were compared with the calculated results.The results show that the composite stiffened panel had a certain post-buckling carrying capacity,and the failure mode consisted of the adhesive failure and fracture of stiffener and the tearing of skin.The error between the critical buckling load calculated by the engineering method and FEM method and that of experiment was 13.8% and -1 5.5%respectively.The results agreed well,indicating the accuracy of the engineering method and the reasonableness of the finite element model.%分别应用工程算法和有限元软件 ANSYS 对碳纤维增强环氧树脂复合材料加筋板的压缩稳定性进行了分析，得到了加筋板的临界失稳屈曲载荷和屈曲模态；同时对复合材料加筋板进行了压缩稳定性试验，并与计算结果进行了对比验证.结果表明：碳纤维增强环氧树脂复合材料加筋板具有后屈曲承载能力，其压缩破坏形式主要为筋条的脱胶、断裂和蒙皮的撕裂；工程算法结果、有限元计算结果与试验得到的临界屈曲载荷误差分别为13．8％和－15．5％，结果较吻合，证明了工程算法的正确性和有限元模拟方法的合理性.