Numerical Analysis of Steel I-Core Sandwich Panels Subjected to Multiple Consecutive Blast Scenarios

The nonlinear dynamic response of steel I-core sandwich panels under three multiple consecutive blast scenarios using five different explosive charges has been numerically investigated. The obtained results are compared with available experimental data to verify the developed finite element model, and good agreement is observed. Special emphasis is placed on the evaluation of maximum displacements of cover plates and energy dissipation of different parts of the panels. According to the results, sandwich panels show better performance than equivalent solid plate with the same mass and material when subjected to consecutive blasts. Overall responses of panels are dependent on not only blast pressure, but also the sequence of loading. In this regard, three different phases of deformation based on blast pressure and sequence are observed in the response of panels when subjected to multiple blasts.