DENTING AND FAILURE OF LIQUID-FILLED TUBES UNDER LATERAL IMPACT

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