Optimum design for energy absorption of bitubal hexagonal columns with honeycomb core
Optimum design for energy absorption of bitubal hexagonal columns with honeycomb core
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DOI：
10.1080/13588260701731732
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发表时间：
2008-01
影响因子：
1.9
通讯作者：
Xiong Zhang;G. Cheng;B. Wang;Hui Zhang
中科院分区：
文献类型：
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作者：
Xiong Zhang;G. Cheng;B. Wang;Hui Zhang
研究了蜂窝芯双管六角形铝柱在动态轴向破碎下破碎能量吸收最大化问题。蜂窝芯由18个厚度相同的内孔壁组成。整个破碎元件的质量和截面的外部尺寸保持恒定，而内轮廓的边长和内外壁的厚度作为设计变量。采用非线性显式有限元程序LS-DYNA模拟双管柱的轴向压溃行为，并应用响应面法获得设计空间内的最优设计。结果表明，通过优化可以显着提高蜂窝芯双管六角柱的比能量吸收，并为类似结构的防撞设计提供有用的建议。
This paper is concerned with the maximisation problem of the crushing energy absorption of bitubal hexagonal aluminium columns with honeycomb core under dynamic axial crushing. The honeycomb core is made up of 18 internal cell walls with the same thickness. The mass of the whole crush element and the outer dimension of the section are kept constant, while the side length of inner profile and the thickness of the inner and outer wall are used as design variables. The nonlinear explicit finite element code LS-DYNA is adopted to simulate the axial crushing behaviour of bitubal columns and the response surface method is applied to obtain the optimum design in the design space. The results show that the specific energy absorption of bitubal hexagonal columns with honeycomb core can be significantly improved by optimisation and allow us to present useful proposals for the crashworthy design of similar structures.