Load-Carrying Capacity of Circular Sandwich Plates at Large Deflection: Fid-Bau Portal

Load-Carrying Capacity of Circular Sandwich Plates at Large Deflection

Zhu, Feng

AbstractThe load-carrying capacity of circular sandwich panels under the quasi-static loading applied in the central area is investigated in this paper. The panels consist of two metallic face sheets and a metallic foam core, and they are simply supported or fully clamped at the edges. A velocity field is assumed to estimate the large deflection response, which is defined according to the initial deformation mode of the flat panel and boundary condition. In order to validate the analytical solution a finite-element simulation has been performed. Good agreement confirms that the quasi-static behavior of circular sandwich plates is well captured by the analytical model. A parametric study is then carried out to examine the effect of the boundary condition, face-to-core thickness ratio, and core strength on the structural response. It is shown that membrane effect caused by large deflection has a significant influence on the postyield response, especially in the case of a fully clamped boundary. Using the analytical model, a comparative study is carried out between the sandwich panels and monolithic plates, on their energy-dissipating performance.