Abstract: In order to study the anti-explosion ability and energy absorption mechanism of the sandwich plates under blast loading, the FEM software Abaqus/Explict is used to simulate the response process of the solid plate and the sandwich plate. The solid plate is modeled with shell elements and continuum elements respectively. The results show the elements type has little effect on the results. During the same condition the deformation of the front plate is bigger than the solid plate, while the deformation of the back plate is smaller than the solid plate. The external force work mainly converses the kinetic energy and plastic deformation energy, and the latter is the main. The plastic energy absorption ability of the sandwich plate is bigger than the solid one obviously. In a certain range of the load, the advantage is more obvious. The research results show that the numerical simulation method is suitable for the researching the sandwich anti-explosion structure, and the results have good agreement with the experiments. The energy absorption of sandwich structure is mainly the plastic deformation energy.

Key words: sandwich plates, explosive shocking, energy absorption mechanism, simulation research