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汽车安全与节能学报

汽车安全与节能学报 ›› 2020, Vol. 11 ›› Issue (3): 287-295.DOI: 10.3969/j.issn.1674-8484.2020.03.003

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板状立方点阵超结构填充汽车吸能盒的抗冲击吸能特性

张鹏 1 ，齐德兴 1 ，夏勇 2 ，李营 1 ，吴文旺 3,*   

  1. （1. 北京理工大学 先进结构技术研究院，北京 100081，中国； 2. 汽车安全与节能国家重点实验室，清华大学，北京 100084，中国； 3. 上海交通大学 船舶海洋与建筑工程学院 工程力学系，上海 200240，中国）
  • 收稿日期:2019-12-11 出版日期:2020-09-30 发布日期:2020-10-20
  • 通讯作者: 汽车安全与节能国家重点实验室开放基金 (KF1808)。
  • 作者简介:第一作者 / First author ： 张鹏（1992—），男（回），宁夏，硕士研究生。E-mail ：1412305376@qq.com。
  • 基金资助:
    汽车安全与节能国家重点实验室开放基金 (KF1808)。

Impact energy-absorption performances of an automobile energy-absorbing-box with plate cubic-lattice core filled

ZHANG Peng1 , QI Dexing1 , XIA Yong2 , LI Ying1 , WU Wenwang3,*   

  1. (1. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China; 2. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China; 3. Department of Engineering Mechanics, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)
  • Received:2019-12-11 Online:2020-09-30 Published:2020-10-20

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摘要： 为满足汽车轻量化设计对吸能结构的要求，进行了板状立方点阵力学设计及冲击吸能研究。 设计出简单立方（SC）、体心立方（BCC）、面心立方（FCC）3 种板状立方基本胞元，及其组合 SCBCC、SC-FCC 2 种组合胞元。对 BCC、FCC、SC-BCC、SC-FCC 等 4 种板状点阵结构变形机制、 力学响应进行了系统分析，将 4 种结构在 10、50 m/s 冲击速度下吸能特性进行评估对比。结果显示： 板状立方点阵结构填充吸能盒低速冲击下峰值载荷低于100 kN，其平均载荷与峰值载荷近乎相等， 组合胞元填充吸能盒比吸能 (SEA) 高于 32 J/g。板状立方点阵结构较传统吸能盒具有优良的抗冲击和 吸能特性，在轻量化汽车被动防护领域有广阔应用前景。

关键词: 汽车, 轻量化设计, 吸能盒, 抗冲击吸能, 板状立方点阵, 准静态压缩, 冲击动力学, 仿真

Abstract:  In order to meet the higher requirements of energy absorbing structure in the lightweight design of automobile, the mechanical design and impact energy absorption of plate cubic lattice are studied. Three kinds of basic cell structures of the plate-like cube, simple cube (SC), body centered cube (BCC) and face centered cube (FCC) are designed, and two composite cell structures SC-BCC, SC-FCC are obtained by combining the basic cells. The deformation mechanism and mechanical response of BCC, FCC, SC-BCC and SC-FCC lattice structures are analyzed systematically, and the energy absorption performance of four structures under 10 and 50 m/s impact velocity are evaluated and compared. The results show that the peak load of the energy absorbing box filled with plate cubic-lattice core is less than 100 kN under 4.4 m/s impact, and the average load is almost equal to the peak load, and the specific energy absorption (SEA) of the composite lattice core filled energy absorption box is higher than 32 J/g. Comparative study found that the plate-like cubic lattice has excellent impact resistance and energy absorption characteristics, and has a broad application prospect in the field of lightweight automobile passive protection.

Key words: automobiles, lightweight design, energy absorbing boxes, impact energy absorption, plate cubic lattices, quasi-static compression, impact dynamics, simulations

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