Optimization of Sandwich Panels to Blast Pulse Loading

In this article, the optimization of the face sheet layers is carried out finding a spatially variable distribution of the stiffness properties that minimize the interlaminar stresses. The optimal orientation of the reinforcement fibers is the solution to the Euler-Lagrange equations representing the stationary conditions for the energy contributions under in-plane variation of plate stiffness coefficients. A refined multilayered plate model with a high-order, piecewise variation of displacements across the thickness is employed, that fulfill both the interfacial stress and displacement contact conditions, with the purpose to accurately and efficiently simulate the interlaminar stresses at the interfaces with the core.