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首页> 外文期刊>Journal of Mechanical Science and Technology >Crashworthy capacity of a hybridized epoxy-glass fiber aluminum columnar tube using repeated axial resistive force
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Crashworthy capacity of a hybridized epoxy-glass fiber aluminum columnar tube using repeated axial resistive force

机译：反复轴向阻力作用下混合环氧玻璃纤维铝柱形管的耐碰撞能力

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摘要

A combination of aluminum columnar member with composite laminate to form a hybrid structure can be used as collapsible energy absorbers especially in automotive vehicular structures to protect occupants and cargo. A key advantage of aluminum member in composite is that it provides ductile and stable plastic collapse mechanisms with progressive deformation in a stable manner by increasing energy absorption during collision. This paper presents an experimental investigation on the influence of the number of hybrid epoxy-glass layers in overwrap composite columnar tubes. Three columnar tube specimens were used and fabricated by hand lay-up method. Aluminum square hollow shape was combined with externally wrapped by using an isophathalic epoxy resin reinforced with glass fiber skin with an orientation angle of 0 degrees/90 degrees. The aluminum columnar tube was used as reference material. Crushed hybrid-composite columnar tubes were prepared using one, two, and three layers to determine the crashworthy capacity. Quasi-static crush test was conducted using INSTRON machine with an axial loading. Results showed that crush force and the number of layers were related to the enhancement of energy absorption before the collapse of columnar tubes. The energy absorption properties of the crushed hybrid-composite columnar tubes improved significantly with the addition of layers in the overwrap. Microscopic analysis on the modes of epoxy-glass fiber laminate failure was conducted by using scanning electron microscopy.
机译：铝柱状构件与复合层压板的组合以形成混合结构可以用作可折叠的能量吸收器，特别是在汽车车辆结构中以保护乘员和货物。复合材料中铝制构件的主要优势在于，它通过增加碰撞过程中的能量吸收，以稳定的方式为塑性和稳定的塑性塌陷机制提供渐进变形。本文提出了对包裹复合柱状管中混合环氧玻璃层数的影响的实验研究。使用三个柱状试管，并通过手工铺装法制造。通过使用以玻璃纤维蒙皮增强的等角度的环氧树脂以0度/ 90度的定向角将铝方形空心形状与外部包裹在一起。铝制圆柱管用作参考材料。用一层，两层和三层制备粉碎的混合复合材料圆柱管，以确定其耐撞能力。使用INSTRON机器在轴向载荷下进行了准静态挤压试验。结果表明，挤压力和层数与柱状管坍塌前能量吸收的增强有关。压碎的杂化复合圆柱管的能量吸收特性随着外包装中的层的增加而显着提高。使用扫描电子显微镜对环氧玻璃纤维层压板的破坏模式进行了微观分析。

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