Blast resistance of sandwich-walled hollow cylinders with aluminum foam cores

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (23) : 166-173.

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Blast resistance of sandwich-walled hollow cylinders with aluminum foam cores

LIU Xin-rang1，TIAN Xiao-geng1，LU Tian Jian1，LIANG Bin2，WANG Yi-qing3

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Abstract

Based on the effectiveness of the method of finite elements used in this paper, the dynamic responses of two different hollow cylinders with equal mass are studied using LS-DYNA under three different blast loading. One has sandwich wall with A3 steel face-sheets and close-celled aluminum foam core, and the other has monolithic A3 steel wall. In addition, the blast resistance of five different sandwich-walled hollow cylinders are also studied. The results demonstrate that the sandwich-walled hollow cylinder is superior to the hollow cylinder with monolithic solid wall under the same blast loading, whether in terms of deformation or energy absorption. For sandwich-walled hollow cylinder, the thickness of inner face-sheet should not bigger than that of outer face-sheet, and only in this condition can reduce the global deformation of sandwich-walled hollow cylinder and take the advantage of the energy absorption of foam core.

Key words

blast loading / aluminum foam / sandwich / hollow cylinder / blast resistance / numerical simulation / energy absorption

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LIU Xin-rang;TIAN Xiao-geng;LU Tian Jian;LIANG Bin;WANG Yi-qing. Blast resistance of sandwich-walled hollow cylinders with aluminum foam cores[J]. Journal of Vibration and Shock, 2012, 31(23): 166-173