Analysis of composite honeycomb sandwich panels under blast loads

This paper presents a novel isogeometric model to analyze the static bending, fre, and forced vibration characteristics of a sandwich of two-layer plates made of auxetic honeycomb core and laminated three-phase polymer/GNP/fiber skin subjected to a double blast load. The two layers are restricted from vertical movement by elastic pins but they can still move in the horizontal plane. The unique feature of the refined first-order shear plate theory with a distribution function g(z) is used to replace the shear correction factor, thereby allowing the shear stress at the top and bottom surfaces to be accurately calculated. The results are derived by the exact Navier solutions for rectangular plates and the IGA method with arbitrary boundary conditions for elliptical and rectangular plate structures. A comprehensive investigation was conducted to evaluate the influence of some parameters on the oscillation of sandwich two-layer plates subjected to double blast load.