Numerical Simulation of Blast Resistant Characteristics for the Composite Structure Anti-explosion Container

The blast resistant characteristics of anti-explosion container built-in cylindrical shells/group spring and aluminum foam sandwich under 3 kg TNT explosion impact loading were numerically simulated using LS-DYNA explicit non-linear dynamic finite element analysis(FEA) program. Results show that the container interior pressure load reveals the multiple pulsating characteristics. The specific impulse load experiences several step rise. The cylindrical shell/group spring structure can deliver energy to absorbing energy aluminum foam sandwich more evenly and makes the energy absorption efficiency of aluminum foam enhance obviously under the presime to guarantee that the plastic deformation does not occur in the inner cylinder of anti-explosion container. The quantitative analysis of energy conversion and absorption of each materials and all parts in anti-explosion container shows that alumium foam sandwich can transfer and absorb impact energy gained from the internal cylinder steel plate by the foam of unloading kinetic energy and transmission stress wave.