| 引用本文: | 赵桂范,崔东,邓作梁.夹层材料式发动机罩行人保护功效[J].哈尔滨工业大学学报,2011,43(1):125.DOI:10.11918/j.issn.0367-6234.2011.01.025 |
| .The pedestrian protection efficacy of sandwich material engine hood[J].Journal of Harbin Institute of Technology,2011,43(1):125.DOI:10.11918/j.issn.0367-6234.2011.01.025 |
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| 摘要: |
| 为降低行人事故中的行人头部损伤,研究了面板为钢板芯材为PVC泡棉材料的夹层材料发动机罩的行人头部保护性能.应用Eshelby等效夹杂理论和Mori-Tanaka均匀化方法将该夹层材料等效为各向异性材料并计算该材料的力学性能,应用Ls-dyna动力分析软件进行仿真分析.分析得出当夹层材料等效参数为:厚度0.82mm,密度为5798kg·m-3,杨氏模量E1=E2=146.42GPa,E3=0.1396GPa,泊松比v21=0.3,v31=v32=0.0029,剪切模量G12=56.31GPa,G23=G31=44.45GPa时成人及儿童头部均能获得较好的保护性能.研究结果表明合理设计夹层材料参数能够有效降低行人头部损伤值. |
| 关键词: 夹层材料 头部 仿真 行人保护 |
| DOI：10.11918/j.issn.0367-6234.2011.01.025 |
| 分类号:U463.833 |
| 基金项目: |
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| The pedestrian protection efficacy of sandwich material engine hood |
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1.School of Automobile Engineering,Harbin Institute of Technology,264209 Weiha,Shandong,China;2.Dept. of Mechanical and Automation Engineering,Da-Yeh University,51591 Zhanghua,Taiwan,China
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| Abstract: |
| To reduce the pedestrian injury in accidents,the protection efficacy of sandwich material hood made of steel panel with PVC foam material inside was studied. The sandwich material was treated as anisotropic material by using the Eshelby’s principle and MoriTanaka’s method,and then its mechanical properties was calculated. The simulation of head impacting process was carried out by Ls-Dyna,and the results showed that,when some suitable parameters of the sandwich material were selected,the injury value of pedestrian head could be effectively reduced. |
| Key words: sandwich material head simulation pedestrian protection |
