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首页> 外文期刊>Materialpruefung: Werkstoffe und Bauteile, Forschung Prufung Anwendung >An experimental and numerical investigation of the effects of geometry and spot welds on the crashworthiness of vehicle thin-walled structures
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An experimental and numerical investigation of the effects of geometry and spot welds on the crashworthiness of vehicle thin-walled structures

机译：几何形状和点焊效应对车辆薄壁结构耐力效果的实验与数值研究

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摘要

This paper aims to develop a new crash box with improved crashworthiness at reduced cost and weight as a base design for use in the automotive industry. Firstly, a baseline crash box model as presently used by the automotive industry was comprehensively examined by numerical crash analysis using Ls-Dyna software.. Considering the initial design geometry, forty-five different crash box designs were developed by making changes in the geometry and wall thickness of the thin walled structures. The effects of the changes in wall thickness and geometry in alternative crash box designs on crash performances such as total energy absorption, peak crush force, mean crush force, specific energy absorption and crush force efficiency were investigated. The optimum crash box design obtained numerically was validated experimentally by means of the drop tower impact system. The numerical crash analysis results clearly agree with the experimental test results. In this study, a new crash box design at a lower cost and performing better in crashes compared with the other forty-six designs has been obtained and can be used in the automotive industry as an energy absorber. The results have revealed that crash box geometry, as well as the number and position of the spot welds and sheet-metal thickness have an important effect on crash performance, weight and cost of the crash boxes.
机译：本文旨在开发一个新的碰撞盒，以降低的成本和重量，作为用于汽车行业的基础设计，以降低成本和重量。首先，通过使用LS-DYNA软件的数值碰撞分析全面地检查汽车行业目前使用的基线崩溃框模型。考虑初始设计几何，通过在几何形状的变化和变化开发了四十五种不同的碰撞盒设计薄壁结构的壁厚。研究了墙壁厚度和几何形状的变化在替代碰撞箱中的碰撞性能下设计，例如总能量吸收，高峰压力，平均压碎力，特定能量吸收和挤压力效率。通过下落塔冲击系统通过实验进行了数控获得的最佳碰撞盒设计。数值崩溃分析结果明确达成了实验测试结果。在这项研究中，已经获得了一种新的碰撞盒设计，并且已经获得了与其他46个设计相比崩溃更好的成本和更好地执行，并且可以在汽车工业中作为能量吸收器使用。结果表明，碰撞箱几何形状，以及点焊和金属板厚度的数量和位置对碰撞箱的碰撞性能，重量和成本具有重要影响。

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