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| Dynamic response and damage modes of thin-walled square tubes subjected to explosion loading |
| SONG Ke-jian, LONG Yuan, JI Chong, GAO Fu-yin, LI xing-hua |
| PLA University of Science and Technology, Nanjing 210007, China |
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Abstract Numerical simulation and experimental test were carried out on the dynamic response of thin-walled steel square hollow tubes subjected to explosion loading. Impact experiments of explosion loading caused by 200g TNT charge on the steel square tubes were carried out. The deformation modes and damage modes were obtained under different conditions. The experimental results show that when the charge distance was greater than or equal to 14 cm, the structures underwent local deformation only. When the charge distance was equal to 10cm and 12 cm, the structures underwent local and global deformation. The experimental results also show that the two side walls facing explosion display long strip rupture damage. By using LS-DYNA, the deformation and damage processes of thin-walled tubes subjected to explosion loading were numerically simulated with Lagrangian-Eulerian coupling method. The deformation processes of thin-walled tubes as well as the deflection-time curves of some key points were also obtained. We also analyzed the dynamic response of the square tubes affected by the width to thickness ratio. The results show that the deformation value decreased with the decreasing of the width to thickness ratio.
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Received: 13 August 2015
Published: 15 May 2016
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