含分层复合材料层合板剪切屈曲的实验研究

EXPERIMENTAL INVESTIGATIONS ON BUCKLING OF DELAMINATED COMPOSITE PANELS UNDER SHEAR LOAD

对含分层损伤的复合材料层合板在纯剪切条件下进行屈曲试验,并通过对试验载荷—应变曲线及损伤形貌的分析以及试验结果和有限元模拟结果的比较,得出复合材料层合板预制分层损伤面积对其剪切屈曲性能的影响。结果表明,试验件含分层损伤面积越大,其破坏载荷越大,而对应的破坏应变越大,因此分层损伤会降低复合材料层合板的承载力和刚度。含分层损伤的层合板试验件其屈曲临界载荷随着分层损伤面积的增加而减小,抗屈曲性能也随之降低。

Buckling test in shear under load was investigated for delaminated composite panels, the experimental results compared with the FEM （finite element method） simulant results were analyzed to propose the influences of the delaminated area on the shear buckling properties. The results of experimentation indicate that the failure load of the delaminated composite panels declines and the failure strain increases as the increasing of delaminated area. So the delamination can decrease the carrying capacity and the stiffness of the composite panels. The buckling critical load and the capacity of anti-buckling of the specimen decline with the increasing of the delaminated area.