Abstract

This paper outlines the design, analysis and physical testing of the material for the front impact attenuator for the Motorsports car. The material selected was a 20 mm thick panel of veiled polypropylene honeycomb. The design programme Solidworks was used to produce three impact attenuator geometries for analysis – a solid block, a three-tier pyramid and a four-tier pyramid. The impact attenuator was simplified to solid blocks specified with the honeycomb material strengths and tested in ANSYS 14.0. The simulations did indicate that the four-tier pyramid had the greatest energy absorption behaviours. Two full size prototypes were manufactured and destructively tested. The force-displacement curve determined that prototype MKII achieved total energy absorption of 7591 J. The average deceleration was 17.66 g and maximum deceleration was 30.58 g. The polypropylene honeycomb energy absorption and deceleration values comply with FSAE requirements.

摘要

本文概述了赛车前部冲击衰减器材料的设计、分析和物理测试。选择的材料是一块 20 毫米厚的蒙面聚丙烯蜂窝板。设计程序 Solidworks 用于生成三种冲击衰减器几何形状以供分析 - 实心块、三层金字塔和四层金字塔。冲击衰减器被简化为具有蜂窝材料强度的实体块，并在 ANSYS 14.0 中进行了测试。模拟确实表明四层金字塔具有最大的能量吸收行为。制造了两个全尺寸原型并进行了破坏性测试。力-位移曲线确定原型 MKII 的总能量吸收为 7591 J。平均减速度为 17.66 g，最大减速度为 30.58 g。