Influence of the Cell Wall Thickness of Core on the Dynamic Response of Square Honeycomb Sandwich Plate Subjected to Blast Loading

Abstract

In foregoing study, a new phenomenon of the local dent of upper face sheet occurs in the simulation of dynamic response of sandwich plate subjected to blast loading. The reason and the effect of local dent on energy absorption are not ascertained. In this paper, two kind of square honeycomb plate with the cell wall thickness of 1mm and 0.5mm and with the same mass are modeled. And the dynamic response of both plates subjected to blast loading is simulated using LS-DYNA. For the thicker cell wall (1mm), the local dent is obvious while for the thinner cell wall (0.5mm), the local dent is not obvious and can be ignored. In addition, curves of the ratio of the maximum deflection of lower face sheet of sandwich plate to monolithic solid plate vs the mass of TNT charge as well as the ratio of internal energy are obtained. The results indicate that the local dent has the contribution to the energy absorption of sandwich plate especially in early time and the sandwich plate with the core of thinner cell wall has more effective capacity in blast-resistance than that with the core of thicker cell wall.

Numerical Simulation of Penetration Effect of the Rhombic Fragment on Square Honeycomb Sandwich Plate

“…The material of core is Al 3104 with the density of 2.72 g•cm -3 . And the material of fragment is XX steel with a high strength, the density is 7.9 g•cm -3 [4,5].…”

Study on Coupled Medium effects of Complex Slotted Charge Blasting

“…Blasting damage process only in a few milliseconds even tens of microseconds completed within the corresponding many mechanical properties is difficult to get from the test; also in order to reduce the test cost and time constraints, most researchers choose numerical simulation method to the corresponding research [20][21][22], they in the constitutive model of rock material established a large number of studies [23], which provides a theoretical basis for the damage and fracture of rock material.…”