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Acta Mechanica Solida Sinica

, Volume 25, Issue 6, pp 609–615 | Cite as

Denting and Failure of Liquid-Filled Tubes under Lateral Impact

  • Guoyun Lu
  • Jianping Lei
  • Zhijun Han
  • Zhifang Liu
  • Shanyuan Zhang
Article

Abstract

In this paper, numerical simulation of impact cases of liquid-filled tube impacted by missiles is conducted with a commercial finite element code LS-DYNA, and the results obtained are compared with the experimental data to verify the validity of the numerical simulation model adopted. With the verified numerical method, the processes of dynamic response of a blunt indenter impacting an empty or liquid-filled three-span continuous tubular beam are studied when the parameter such as the indenter’s mass, liquid’s density or impact velocity is varied and the other conditions are kept the same. The simulation results indicate that the critical perforation energy and the deformation of the wall of the pipe are significantly influenced by the presence of the liquid and the pressure. The liquid filling the tube provides a ‘foundation’ pressure to resist and localize the deformation, which may affect the perforation process and lead to a reduction of the ballistic limit. The simulation results also indicate that the increase of the fluid density filled in the tube will decrease the ballistic limit, but the fluid density must be in some scope. The relationship between the ballistic limit velocity of the tube and the mass of the impact missile is nonlinear in the Cartesian coordinate while it becomes linear through logarithmic transformation.

Key words

impact perforation fluid-structure interaction tube 

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2012

Authors and Affiliations

  • Guoyun Lu
    • 1
  • Jianping Lei
    • 1
  • Zhijun Han
    • 1
  • Zhifang Liu
    • 1
  • Shanyuan Zhang
    • 1
  1. 1.Institute of Applied MechanicsTaiyuan University of TechnologyTaiyuanChina

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