08.44: Elastic buckling behavior of the surface material in sandwich structure

Abstract

ABSTRACTA sandwich structure manufactured using a thin plate is lightweight, but has high bending stiffness. It is a very ideal structure from an environmental and structural point of view. It is very important to understand the buckling behavior of the surface material in this structure. Many arguments about it are based on in‐plane compression and in‐plane pure shear. When a steel sandwich panel is used on a roof or a wall, it is assumed that out‐of‐plane bending occurs owing to wind pressure and gravity. The purpose of this study is to understand the tendency of elastic buckling strength of the steel sandwich panel under out‐of‐plane bending and evaluate it using a simple formula.The following conclusions are obtained: (1) Select assumptions that are considered the most appropriate for calculating the elastic buckling strength of the steel sandwich panel under out‐of‐plane bending. The theory proposed by Plantema corresponds well to the finite element analysis in scope of this study. (2) Calculate the elastic buckling strength of the steel sandwich panel under out‐of‐plane bending by the method expanded the theory proposed by Plantema. It converges to a constant value when the range of the thickness of the core material is large, and increases when this range is small. (3) Evaluate the elastic buckling strength of the steel sandwich panel under out‐of‐plane bending, and propose a simple approximation formula including the previous one.