Numerical Study on Response of Sandwich Plate with Tetrahedral Truss Core Subjected to Blast Load

This article presents the numerical study carried out to capture the response of metallic sandwich plate when subjected to air blast loads. An explicit finite element analysis is performed to determine the response of a sandwich panel with tetrahedral truss core. The sandwich panel is subjected to uniform blast pressure on its top face sheet assuming suitable boundary conditions in the FEA. Blast load is applied using CONWEP code. The displacement and acceleration at the centre of the back face sheet and different significant energy parameters for whole model are determined. A systematic parametric study is conducted by varying the blast load and geometrical parameters such as core height, face sheet thickness and core cross section of the panel. Performance of panel under blast load is judged on the basis of sandwich panel efficiency. It has been observed that, one of the geometrical parameters like core height has a significant effect on the response of the panel for varying blast load parameters. For a fixed core cross section and fixed face sheet thickness, the highest panel efficiency is obtained corresponding to a core height of 0.140m.