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首页> 外文期刊>Composite Structures >Failure modes and energy absorption mechanism of CFRP Thin-walled square beams filled with aluminum honeycomb under dynamic impact
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Failure modes and energy absorption mechanism of CFRP Thin-walled square beams filled with aluminum honeycomb under dynamic impact

机译：CFRP薄壁方形梁填充铝蜂窝CFRP薄壁方形梁的故障模式和能量吸收机理

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The CFRP thin-walled square beam filled with aluminum honeycomb is a new outstanding energy absorption component. In this paper, the failure modes and energy absorption mechanism of filled CFRP beams are studied by combining numerical simulation and dynamic impact test. Axial collapse process and lateral bending process of filled CFRP beams are analyzed by quasi-static test. Under the two different working conditions, the failure modes and corresponding energy absorption mechanism of specimens with different lay-up angles are analyzed. The results show that the failure modes under axial impact mainly include lateral fibre bending failure, lateral shear failure and local buckling failure. Among them, the large angle lay-up (e.g. [90 degrees]8) is prone to lateral shear failure and has a high material utilization rate. Under lateral impact, the failure modes are different from those under axial impact, which mainly include lateral shear failure and fibre bending failure. The energy absorbed under the two failure modes is less than that absorbed under axial impact, with obvious local failure and a low material utilization rate. Research also shows that the failure modes and energy absorption mechanism of filled CFRP beams are of great significance for the guidance of its structural design.
机译：填充有铝蜂窝的CFRP薄壁方形梁是一种新的出色能量吸收组件。本文通过组合数值模拟和动态冲击试验研究了填充CFRP光束的故障模式和能量吸收机理。通过准静态试验分析填充CFRP光束的轴向塌陷过程和横向弯曲过程。在两个不同的工作条件下，分析了具有不同叠层角度的试样的故障模式和相应的能量吸收机制。结果表明，轴向冲击下的故障模式主要包括横向纤维弯曲衰竭，侧剪剪切故障和局部屈曲故障。其中，大角度叠层（例如[90度] 8）容易产生横向剪切失效并具有高质量的利用率。在横向撞击下，故障模式与轴向撞击下的不同，这主要包括横向剪切失效和纤维弯曲衰竭。在两种故障模式下吸收的能量小于轴向冲击下吸收的能量，具有明显的局部故障和低材料利用率。研究还表明，填充CFRP光束的故障模式和能量吸收机理对于其结构设计的引导具有重要意义。

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