非对称/非均衡复合材料层压板弯曲与扭转耦合变形试验方法

对几种铺层的非对称/非均衡层压板在纯弯载荷下的耦合变形进行了模拟分析, 并进行了板宽、 板厚等参数的影响分析, 在此基础上设计了一套四点弯曲柔性支持装置。采用该装置对两种铺层的非对称/非均衡层压板进行了柔性四点弯曲试验, 并与常规四点弯曲试验进行了对比。柔性四点弯曲装置对非对称/非均衡层压板施加弯曲载荷的同时没有限制试件的扭转变形, 而常规四点弯曲几乎完全限制了非对称/非均衡层压板的扭转变形。柔性四点弯曲加载装置基本上达到了设计要求, 可用于非对称/非均衡层压板弯-扭耦合系数的测试。 

Test method for bending twisting coupling deformation of unsymmetrical/unbalanced composite laminates

A numerical simulation for bending-twisting coupling deformation of unsymmetrical and unbalanced composite laminates under bending load was conducted. The parameters such as laminate width and thickness were also studied. Based on the simulation results, a flexible support device for the four-point-bending test was developed. The flexible four-point-bending tests for unsymmetrical and unbalanced composite laminates were conducted. The test results show that the developed flexible four-point-bending support device does not constrain the twisting deformation of laminates while applying bending load to it. The flexible four-point-bending support device is capable of measuring bending-twisting coupling coefficient of unsymmetrical and unbalanced composite laminates.