Air Blast Resistance and Energy Absorption of Inverted Y-core Aluminium Sandwich Panel

The Abaqus software was used to analyze the nonlinear dynamic responses of an inverted Y-core aluminium sandwich panel under air blast loading. Blast loading is simulated by ConWep model. Different blast scenarios including three standoff distances are considered. Material and geometric nonlinearity are taken into account. Special emphasis is placed on evaluation of the displacement and energy absorption of the models. Based on the results, sandwich panels outperform solid plate with the same density and material in all considered scenarios in the term of energy absorption and midpoint deflection. In all scenarios, most of the internal energy dissipated in Y-core by plastic deformation. Energy absorption in different part of sandwich panel mainly depends on the blast intensity; with the increase in blast intensity, contribution of front face in plastic energy dissipation will increase. The results provide good insight into the dynamic response and energy absorption of Y-core sandwich panels under air blast loading conditions.