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An experimental and numerical analysis on influence of triggering for composite automotive crash boxes under compressive impact loads
International Journal of Crashworthiness ( IF 1.9 ) Pub Date : 2021-05-17 , DOI: 10.1080/13588265.2021.1914953
N. Nasir Hussain 1 , Srinivasa Prakash Regalla 2 , Yendluri V. Daseswara Rao 2 , Abdul Mateen Mohammed 3
Affiliation  

Abstract

In automobiles there is large scope for composite materials to be used for manufacture of structural parts. The development of electric vehicles has caused for a gain in utilization of composites in automotive applications. In the event of a collision composites afford for an electrical insulation aimed at safety in contradiction of electric shock along with higher strength to weight ratios, which helps in making light weight automobile structures. But composite materials have peculiar as well as complex deformation patterns under compressive impact loading, which is common in vehicle collisions. The deformation pattern of the composites depends on the type of materials used for reinforcement as well as matrix and their layout. Triggers which are accommodated in the design of an element so that deformation initiates at the specific region and has a high impact on the attribute with reference to energy absorption the component as they modify the deformation modes. Therefore before using composite materials for structural parts in automobiles, it is essential to characterize their behaviour when subjected to impacts. For the parts under compressive impact loadings the common method employed for studying the behavior under such conditions is Drop weight impact testing. In this study a GFRP (glass fiber reinforced plastic) composites crash boxes with four different cross sections (square, cylindrical, hexagonal and decagonal) provided with two different triggering patterns (slot trigger and front end trigger) are subjected to drop weight impact testing. In this study, influence of triggering on composite crash box is investigated using experimental drop weight testing along with correlation of numerical simulation. The prime motive of this study is to illustrate the influence of triggers on the deformation pattern along with the force and energy absorption level for a GFRP crash boxes under drop weight axial impacts.



中文翻译:

压缩冲击载荷下复合材料汽车碰撞盒触发影响的实验和数值分析

摘要

在汽车中,复合材料用于制造结构部件的范围很大。电动汽车的发展使得复合材料在汽车应用中的应用有所增加。在发生碰撞时,复合材料可提供旨在安全的电绝缘,与电击相矛盾,同时具有更高的强度重量比,这有助于制造轻型汽车结构。但复合材料在压缩冲击载荷下具有特殊而复杂的变形模式,这在车辆碰撞中很常见。复合材料的变形模式取决于用于增强材料的类型以及基体及其布局。元素设计中包含的触发器,以便变形在特定区域开始,并且在修改变形模式时参考组件的能量吸收对属性有很大影响。因此,在将复合材料用于汽车结构部件之前,必须表征它们在受到冲击时的行为。对于在压缩冲击载荷下的零件,用于研究此类条件下行为的常用方法是落锤冲击试验。在这项研究中,具有四种不同横截面(方形、圆柱形、六边形和十边形)的 GFRP(玻璃纤维增​​强塑料)复合材料碰撞盒具有两种不同的触发模式(槽式触发器和前端触发器),并对其进行落锤冲击测试。在这项研究中,采用实验落锤试验以及数值模拟的相关性研究了触发对复合材料碰撞盒的影响。本研究的主要目的是说明触发器对变形模式的影响以及 GFRP 碰撞盒在落锤轴向冲击下的力和能量吸收水平。

更新日期:2021-05-17
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