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Evaluation of Mode II Interlaminar Fracture Toughness of Composite Laminates under Impact Loading

机译:冲击载荷下复合材料层板的II型层间断裂韧性评估

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摘要

A simple experimental method was established in order to evaluate the mode II interlaminar fracture toughness of composite laminates under low velocity impact loading (impact velocity, Vo<20 m/sec0. This method was essentially an impact version of the ENF (End Notched Flexure) test using SHPB (Split Hopkinson Pressure Bar) technique, where a slow-gradient Ramped incident stress wave was utilized to reduce the kinematic effects on the behavior of The specimen and consequently the dynamic energy release rate was calculated by a simple Estimation formula based on static beam theory and compliance method.
机译:建立了一种简单的实验方法,以评估低速冲击载荷(冲击速度,Vo <20 m / sec0)下复合层压板的II型层间断裂韧性。该方法本质上是ENF(带缺口缺口挠曲)的冲击形式SHPB(Split Hopkinson Pressure Bar)技术进行的试验,其中使用了缓梯度的倾斜入射应力波来减小运动对试样性能的影响,因此,通过基于静力的简单估算公式来计算动能释放率梁理论和柔度法。

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