There is an ever-increasing demand in the automotive sector to continuously improve the performance and reduce cost through weight reduction in the structure of the vehicle. In the present scenario, it is also necessary to meet the standards set by crash safety regulating authorities in various parts of the world. In automobiles, the crash box is placed in the anterior region to absorb the impact energy in the event of an accident. Glass fiber reinforced plastic crash boxes have a high strength-to-weight ratio and also are good in energy absorption, particularly useful in this scenario. In this paper, the effectiveness of different triggers in combination with various geometries is investigated for Glass fiber reinforced plastic crash boxes using drop-weight impact testing. A trigger is a geometric irregularity introduced in the crash box design to alter the energy as well as force levels by modifying the deformation mode under loading. Comparison of change in force level, absorption of impact energy, specific energy absorption values was performed for composite crash boxes made of various types of cross-sectional geometries along with multiple patterns of triggers. Force versus displacement (F–D) curves are drawn for all the cases of the glass fiber reinforced plastic crash boxes to understand the behavior of each combination formed with various types of geometries and triggers, under impact loading. Strength-to-weight ratio was considered as the deciding factor for the comparisons to know the best and worst cases of the crash boxes made of different cross-sections along with various trigger types. This study provides detailed insights into the drop-weight impact testing procedure including the preparation of specimens, setting up the drop-weight impact test, preparation of specimen clamps, safety precautions involved, data acquisition from the test and its processing.

中文翻译：

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用于研究复合材料制成的汽车碰撞盒的能量吸收的落锤冲击试验

汽车行业对通过减轻车辆结构的重量来不断提高性能和降低成本的需求不断增加。在目前的情况下，还需要满足世界各地碰撞安全监管机构制定的标准。在汽车中，碰撞盒放置在前部区域以在发生事故时吸收冲击能量。玻璃纤维增​​强塑料碰撞盒具有高强度重量比和良好的能量吸收，在这种情况下特别有用。在本文中，使用落锤冲击试验研究了玻璃纤维增​​强塑料碰撞盒的不同触发器与各种几何形状相结合的有效性。触发器是碰撞盒设计中引入的几何不规则性，通过修改负载下的变形模式来改变能量和力水平。对由各种横截面几何形状和多种触发器模式制成的复合材料碰撞盒进行了力水平变化、冲击能量吸收、特定能量吸收值的比较。为玻璃纤维增​​强塑料碰撞盒的所有情况绘制了力与位移 (F-D) 曲线，以了解在冲击载荷下由各种类型的几何形状和触发器形成的每种组合的行为。强度重量比被认为是比较的决定因素，以了解由不同横截面以及各种触发器类型制成的碰撞盒的最佳和最坏情况。