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首页> 外文期刊>Engineering Structures >Crushing behavior of multi-component conical tubes as energy absorber: A comparative analysis between end-capped and non-capped conical tubes
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Crushing behavior of multi-component conical tubes as energy absorber: A comparative analysis between end-capped and non-capped conical tubes

机译：作为能量吸收器的多组分锥形管的破碎行为：端盖式和非盖式锥形管的比较分析

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摘要

Design of multi-component absorber is a method to improve the specific energy absorption (SEA) and reduce the peak crushing load at the time of the initial accident. In this study, multi-component conical specimens are made from aluminium in the form of end-capped and non-capped. To do so, a long conical tube is divided into several shorter thin-walled conical portions, so that the thickness, length and mechanical properties of the wall vary along the tube length. The purpose of this new design on the conical absorber is to modify performance of shock absorber including decrease of initial peak crushing load and increase of SEA. Therefore, a series of quasi-static experimental tests are carried out on the end-capped and non-capped multi-component conical tubes and parameters of energy absorption, initial peak load, crush force efficiency and SEA are calculated. The results show that the maximum crushing load in simple conical tubes begins at first folding, while it is shifted to the end of the crushing process in multi-component conical tubes. Also, it is shown that the SEA and the crush force efficiency of the non-capped multi-component specimens were further in comparison with the end-capped ones. Finally, it was found that by using this type of the energy absorber, damage to the main structure and also the occupants of car was decreased.
机译：多组分吸收器的设计是一种提高比能量吸收（SEA）并减少首次事故时的峰值破碎负荷的方法。在这项研究中，多组分圆锥形样品由铝制成，有端盖和无盖形式。为此，将一根长锥形管分成几个较短的薄壁锥形部分，以使壁的厚度，长度和机械性能沿管的长度变化。圆锥形减震器上这种新设计的目的是改变减震器的性能，包括降低初始峰值破碎载荷和增加SEA。因此，对有端盖和无端盖的多组件锥形管进行了一系列准静态试验，并计算了能量吸收，初始峰值载荷，压溃力效率和SEA的参数。结果表明，在简单的锥形管中，最大破碎载荷始于第一次折叠，而在多组分锥形管中，最大载荷则转移到破碎过程的最后。另外，还显示出与封端的相比，未封端的多组分试样的SEA和压碎力效率更高。最后，发现通过使用这种类型的能量吸收器，减少了对主体结构的损害以及对汽车乘员的损害。

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