In this study, a novel crash box idea was presented, including a step by step collapsible structure by joining coaxial tubes with gradual bonding surface areas. This telescopic crash box was absorbed to impact energy by sequentially fracturing adhesive interfaces from the top tube to the back tubes. In each bonding interface fracture, a certain amount of the impact energy was reduced. This gradually cracked adhesive bonds and the ability to the displacement of the coaxial tubes into back tubes give the crashworthiness event to get benefit more breaking time and repairable crash boxes after small impacts, especially for pedestrians, impacts less impact force and extension of the impact duration. Validation of the design was performed using the Finite Element Simulations by parametric modeling of the representative design of crash boxes with frontal impact simulations of a vehicle. Transmitted forces to the vehicle body have obtained according to impact duration. Impact energies were calculated using the area under the impact of force-displacement curves. The optimal size of the coaxial tube bonding interfaces and the number of the telescopic tubes were obtained for maximum energy absorption comparing with conventional crash boxes.

中文翻译：

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铝管粘结的可逐渐折叠的碰撞盒

在这项研究中，提出了一种新颖的防撞箱构想，包括通过将同轴管与逐渐粘结的表面区域连接起来来逐步折叠结构。通过从顶部管到后管依次压裂粘合剂界面，该伸缩式碰撞盒被吸收以冲击能量。在每个粘结界面断裂中，一定量的冲击能被降低。这种逐渐破裂的胶粘剂结合以及将同轴管移入后管的能力赋予了耐撞性，从而在较小的冲击力后，尤其是对行人而言，冲击时间更短，冲击力更小，冲击时间更长，从而使破碎时间更长，可修复的碰撞盒更有利。 。设计的验证是通过有限元模拟通过车辆正面碰撞模拟对碰撞盒的代表性设计进行参数化建模来进行的。根据冲击持续时间获得了传递给车身的力。使用在力-位移曲线的影响下的面积来计算冲击能。与传统的碰撞盒相比，获得了最大的能量吸收，从而获得了同轴管粘结界面的最佳尺寸和伸缩管的数量。