EPP泡沫填充对铝蜂窝动态冲击性能的影响研究

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (4): 45-50.

EPP泡沫填充对铝蜂窝动态冲击性能的影响研究

刘强^1,2, 何兆亨², 陈航²

1.湖南大学机械与运载工程学院,长沙410082;
2.中山大学工学院,广州510006

收稿日期:2017-08-08 出版日期:2018-04-20 发布日期:2018-04-20
作者简介:刘强(1981-),男,博士,副教授,主要从事轻量化复合材料汽车结构开发,Liu5168198110@126.com。
基金资助:
国家自然科学基金(51675540);中国博士后科学基金(2015M582323);湖南省自然科学基金(2016JJ3039)

EXPERIMENTAL INVESTIGATION INTO THE DYNAMIC IMPACTRESPONSES OF ALUMINUM HONEYCOMB PANEL FILLED WITH EPP FOAM

LIU Qiang^1,2, HE Zhao-heng², CHEN Hang²

1.School of Mechanical Engineering, Hunan University, Changsha 410082, China;
2.School of Engineering, Sun Yat-sen University, Guangzhou 510006, China

Received:2017-08-08 Online:2018-04-20 Published:2018-04-20

摘要/Abstract

摘要： 采用动态冲击实验方法研究了EPP(聚丙烯塑料发泡材料)泡沫填充对铝蜂窝结构动态冲击性能的影响。研究发现:在相同的冲击速度下,相对空铝蜂窝,EPP泡沫填充铝蜂窝结构的初始峰值应力和平均应力分别提高了32.86%~68.57%和15.00%~72.50%,比吸能下降了33.54%~66.56%;在相同的泡沫密度下,填充结构的初始峰值应力、平均应力和比吸能值均随着冲击速度的增加而增加,2.6 m/s和3.2 m/s时的比吸能比2 m/s时的比吸能3.26 J/g增加了68.10%~152.45%;对比准静态压缩实验,动态冲击中的初始峰值应力提升了1.72%~12.04%,平均应力下降了6.51%~18.84%,比吸能下降了31.50%~65.50%。研究表明,利用EPP泡沫填充铝蜂窝,能改善铝蜂窝结构的轴向动态冲击性能。

关键词: 轻量化, 铝蜂窝, EPP泡沫, Ls-dyna, 动态冲击性能

Abstract: The paper investigated the dynamic impactresponses and failure process of aluminum honeycomb panel filled with EPP foam (Expanded polypropylene) experimentally.It was found that the initial peak stress and average stress of EPP foam filled aluminum honeycomb increased by 32.86%~68.57% and 15.00%~72.50% respectively, compared to the bare honeycomb under the same impact velocity. But the specific energy absorption (SEA) reduced by 33.54%~66.56%. For the filled panels with the same foam density, the initial peak stress,average stress and specific energy absorption increased with th increase in impact velocity. The SEA values under the impact velocity of 2.6 m/s and 3.2 m/s increased by 68.10%~152.45% compared to the impact velocity of 2 m/s. By comparing with the characteristics in the static compression test, the initial peak stress in the dynamic impact test increased by 1.72%~12.04%, whereas the average stress decreased by 6.51%~18.84%, and the SEA valuses decreased by 31.50%~65.50%. The study showed that EPP foam filling was effective to improve the impact performance of the bare aluminum honeycomb.

Key words: lightweight, aluminum honeycomb, EPP foam, Ls-dyna, dynamic impact characteristics

中图分类号:

TB332

刘强, 何兆亨, 陈航. EPP泡沫填充对铝蜂窝动态冲击性能的影响研究[J]. 玻璃钢/复合材料, 2018, 0(4): 45-50.

LIU Qiang, HE Zhao-heng, CHEN Hang. EXPERIMENTAL INVESTIGATION INTO THE DYNAMIC IMPACTRESPONSES OF ALUMINUM HONEYCOMB PANEL FILLED WITH EPP FOAM[J]. Fiber Reinforced Plastics/Composites, 2018, 0(4): 45-50.

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