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Optimization of a motorcyclist protection system made of recycled rubber – impact simulation and test uncertainties
International Journal of Crashworthiness ( IF 1.8 ) Pub Date : 2021-02-22 , DOI: 10.1080/13588265.2021.1889236
M. Sánchez-Lozano 1 , D. Abellán-López 1
Affiliation  

Abstract

This paper describes the design and optimization of a safety barrier to protect motorcyclists in case of an accident, using, as a basis, rubber from used tires. The proposed motorcycle protection system (MPS) attempts increase motorcyclist protection in roads. But, at the same time, it offers a new alternative for the reuse of rubber from used tires, thus contributing to solving the environmental problem created by this type of waste. A first pre-design was proposed and tested according to UNE-135900 standard to evaluate the protection level against motorcyclist impact. Then, a finite element model of the new MPS and the dummy was used to reproduce the experimental impact tests. The model was validated and adjusted using data from material characterization tests and from a full-scale crash test carried out on a first prototype. The main design parameters influencing the deformation shape and the effort peaks obtained during impact were analyzed. Several modifications over the original barrier were made in order to meet the requirements of the standard. The new design of the barrier was tested, showing a lower severity than the initial prototype. In view of the results, the use of rubber appears to be technically feasible for the manufacture of these motorcyclist protection systems. However, some discordances were found between the injuries measured in the tests and the expected results obtained by simulation. High sensitivities to small variations in installation height and/or slight movements of the dummy’s head during the launch phase are pointed out as possible causes.



中文翻译:

由再生橡胶制成的摩托车手保护系统的优化——冲击模拟和测试不确定性

摘要

本文介绍了安全屏障的设计和优化,以在发生事故时保护摩托车手,使用旧轮胎的橡胶作为基础。提议的摩托车保护系统 (MPS) 尝试增加道路上摩托车手的保护。但与此同时,它为废旧轮胎橡胶的再利用提供了一种新的替代方案,从而有助于解决此类废物造成的环境问题。提出了第一个预设计并根据 UNE-135900 标准进行了测试,以评估对摩托车手撞击的保护水平。然后,使用新 MPS 和假人的有限元模型来重现实验冲击测试。该模型使用来自材料特性测试和在第一个原型上进行的全面碰撞测试的数据进行了验证和调整。分析了影响变形形状的主要设计参数和冲击过程中获得的力峰值。为了满足标准的要求,对原始屏障进行了多次修改。对屏障的新设计进行了测试,显示出比初始原型更低的严重性。从结果来看,使用橡胶制造这些摩托车保护系统在技术上似乎是可行的。然而,在测试中测量的伤害与通过模拟获得的预期结果之间发现了一些不一致。指出在发射阶段对安装高度的微小变化和/或假人头部的轻微移动高度敏感是可能的原因。为了满足标准的要求,对原始屏障进行了多次修改。对屏障的新设计进行了测试,显示出比初始原型更低的严重性。从结果来看,使用橡胶制造这些摩托车保护系统在技术上似乎是可行的。然而,在测试中测量的伤害与通过模拟获得的预期结果之间发现了一些不一致。指出在发射阶段对安装高度的微小变化和/或假人头部的轻微移动高度敏感是可能的原因。为了满足标准的要求,对原始屏障进行了多次修改。对屏障的新设计进行了测试,显示出比初始原型更低的严重性。从结果来看,使用橡胶制造这些摩托车保护系统在技术上似乎是可行的。然而,在测试中测量的伤害与通过模拟获得的预期结果之间发现了一些不一致。指出在发射阶段对安装高度的微小变化和/或假人头部的轻微移动高度敏感是可能的原因。从结果来看,使用橡胶制造这些摩托车保护系统在技术上似乎是可行的。然而,在测试中测量的伤害与通过模拟获得的预期结果之间发现了一些不一致。指出在发射阶段对安装高度的微小变化和/或假人头部的轻微移动高度敏感是可能的原因。从结果来看,使用橡胶制造这些摩托车保护系统在技术上似乎是可行的。然而,在测试中测量的伤害与通过模拟获得的预期结果之间发现了一些不一致。指出在发射阶段对安装高度的微小变化和/或假人头部的轻微移动高度敏感是可能的原因。

更新日期:2021-02-22
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