Consideration of Through the Thickness Strains for a Sandwich Panel

摘要

A plate theory is developed to consider the compressibility of a core material within a sandwich plate. In order to construct the relationships, the authors assume that the transverse strains do not vary in the thickness direction within the face sheets and the core but can be different functions of in-plane coordinates in different sublaminates. Damage progression is incorporated into the computational scheme. Nonlinear VonKarman relationships are also considered within a finite element formulation. Solutions are carried out assuming cylindrical bending and the results are compared with close form solutions. It is shown that very good results can be obtained without using many degrees of freedom.