The orthotropic nature of composites provides an excellent performance in the fiber direction, but it is susceptible to failure in the orthogonal direction. Failure due to the delamination is limited to composites, and has adverse consequence on its mechanical properties. This study has been conducted to determine the interlaminar tensile (ILT) failure modes of the laminated composites. A curved beam test specimen was used to determine the ILT strength of a laminated composite. A carbon/epoxy prepreg tape material was used to manufacture the composite panels, and then a four-point bend test was conducted to determine the ILT strength. The test coupons were fitted with metal clamps on both sides of the curved sections. The clamps were manufactured using Aluminum 7075-O alloy without any heat treatment to fit the tight radius and thickness of the test coupons. These clamps were attached to the curved sections of the beam using a Hysol EA 9394 adhesive. It was observed that the ILT failure of the test coupons with metal clamps was significantly delayed as compared to baseline results.
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机译：复合材料的正交性质在纤维方向上提供了出色的性能，但它易于在正交方向上发生故障。由于分层引起的故障仅限于复合材料，并且对其机械性能产生不良后果。已经进行了该研究以确定层压复合材料的层状拉伸（ILT）失效模式。使用弯曲梁试样来确定层压复合材料的叶片强度。使用碳/环氧预浸料胶带材料制造复合板，然后进行四点弯曲试验以确定叶片强度。测试试样安装有弯曲部分两侧的金属夹具。使用铝7075-O合金制造夹具，没有任何热处理，以适应测试试样的紧密半径和厚度。使用Hysol EA 9394粘合剂将这些夹具连接到梁的弯曲部分。观察到，与基线结果相比，用金属钳位的测试试样的轴突失效显着延迟。
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