Protection of structures against blast load requires efficient energy absorbing mechanism in order to dissipate the energy imparted to the structure. In this paper, sandwich panel with tube core is numerically evaluated for its energy absorption mechanism. Sandwich panel consists tube cores of various shape in between top and bottom plates. Numerical model is validated with literature values. Parameters considered are tube shape and provision of holes in the tube. Responses compared are the reaction force transmitted to the bottom plate and tube deformation. From the numerical investigaitions, the panels having unstiffened square tube cores with holes on either side or those having elliptical tubes are found to be efficient under and impulse of 55 Ns.

Keywords: Dynamics, Shock, Blast, Impact, Transient & tube core sandwich panels.