Investigation of dynamic response of circular sandwich plates with metal vertical tubes core under blast load

Energy absorption and deformation of circular metal sandwich panels with vertical tubes core under blast load are analyzed experimentally and numerically. The effect of the amount of bending in the core on the deformation profile of the top and bottom plates is presented analytically by using a zero-order Bessel function using the energy method. Numerical simulation is used to determine the plastic energy consumption and the plastic work of the structure. The structures are made using aluminum tubes with equal height having external diameters of 12 and 16 (mm) embedded between the top and bottom plates, perpendicular to the surfaces of the plates. Experimental tests reveal the significant role of inner tubes in energy absorption while the outer tubes do not absorb large amount of blast energy. The transverse displacements obtained from numerical simulation indicate a good agreement with the experimental test results. The maximum plastic work for structures with plate thicknesses of 1.2 and 2 (mm) are calculated as 850 and 332 (J), respectively. The difference between analytical and numerical results is 11% on average.