non-linear dynamic analysis of steel hollow i-core sandwich panel under air blast loading

in this paper, the non-linear dynamic response of novel steel sandwich panel with hollow i-core subjected to blast loading was studied. special emphasis is placed on the evaluation of midpoint displacements and energy dissipation of the models. several parameters such as boundary conditions, strain rate, mesh dependency and asymmetrical loading are considered in this study. the material and geometric non-linearities are also considered in the numerical simulation. the results obtained are compared with available experimental data to verify the developed fe model. modeling techniques are described in detail. according to the results, sandwich panels with hollow i-core allowed more plastic deformation and energy dissipation and less midpoint displacement than conventional i-core sandwich panels and also equivalent solid plate with the same weight and material.