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
1. State Key Laboratory for Mechanical Structural Strength and Vibration，Xi’an Jiaotong University，Xi’an Shaanxi 710049，China；2. Xuhai College，China University of Mining & Technology，Xuzhou Jiangsu 221008，China；3. State Key Laboratory for Mechanical Manufacturing Systems Engineering，Xi’an Jiaotong University，Xi’an Shaanxi 710049，China
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.
2012, Vol. 31 
