Abstract

In this paper, crashworthiness of thermoplastic woven fabric reinforced composite tubes were investigated. Thermoplastic composite tubes with various length (40 mm and 80 mm) and fiber yarn orientation with respective to lengthwise (0 °/90 °, 15 °/75 °, 30 °/60 ° and 45 °/45 °) were manufactured by pultrusion and welding from home-made woven glass fabric/PP prepreg sheets. Quasi-static axial compressive tests of the composite tubes were performed under various temperatures (298 K, 358 K, 398 K and 453 K). Three crushing modes were observed: progressive folding, splaying and weld seam cracking. The influence of fiber orientation, tube length-diameter ratio and testing temperature on the peak load, mean load, specific energy absorption and crush efficiency were investigated. The results show that the peak load is controlled by fiber orientation and testing temperature. The mean force, specific energy absorption and crush efficiency are related to the three mentioned factors. Both fiber orientation and testing temperature have obviously influence on crushing modes of thermoplastic composite tubes. Length-to-diameter ratio also plays a role in crushing modes when the testing temperature is higher than the melting point of the resin.

中文翻译：

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拉挤成型的热塑性编织玻璃纤维增​​强复合管的耐撞性

摘要

本文研究了热塑性机织织物增强复合管的耐撞性。通过拉挤成型制造各种长度（40 mm和80 mm）和长度方向（0°/ 90°，15°/ 75°，30°/ 60°和45°/ 45°）的纤维纱线取向的热塑性复合管并用自制玻璃纤维织物/ PP预浸料片进行焊接。复合管的准静态轴向压缩试验在各种温度（298 K，358 K，398 K和453 K）下进行。观察到三种破碎模式：渐进式折叠，张开和焊缝开裂。研究了纤维取向，管长直径比和测试温度对峰值载荷，平均载荷，比能吸收和压碎效率的影响。结果表明，峰值载荷受纤维取向和测试温度的控制。平均力，比能量吸收和压碎效率与上述三个因素有关。纤维取向和测试温度都对热塑性复合管的破碎方式有明显影响。当测试温度高于树脂的熔点时，长径比在破碎模式中也起作用。