薄弱环节对复合材料波纹梁吸能能力的影响

Effect of Trigger Geometry on Energy Absorption of Composite Waved-beams

薄弱环节设置是复合材料吸能结构的关键技术,良好的设计可以使复合材料结构产生稳定的渐进压溃,从而吸收较多的能量。基于波纹梁准静态轴向压溃实验结果,运用MSC/DYTRAN有限元软件建立了三组不同尺寸的碳纤维环氧树脂波纹梁的有限元模型,在数值模拟结果与实验结果基本吻合的基础上,分析了不同薄弱环节设置对复合材料波纹梁峰值载荷、吸能能力的影响,并进一步比较了不同薄弱环节设置的波纹梁在以6.5m/s的速度碰撞刚性地面时的能量吸能能力。

The trigger geometry is a key technology to the ability of energy absorption of composite structures. Reasonable design of triggering mechanism can make composite structures destroyed steadily and gradually thus lead to more energy absorbed. The FEM models of three sets of wavedbeams with different sizes were set up with the explicit finite element code MSC/DYTRAN. Based on the good correlation of experimental results and numerical data of waved-beams, the effect of different trigger geometries on the peak load and energy absorption property was analyzed. The energy absorption capability of the waved-beams with different trigger geometry was further compared when the waved beams impacted the rigid ground at a velocity of 6.5m/s.