Simulation for Behavior of Global and Local Coupling Instability in Sandwich Plate
In recent decades, sandwich plates have been widely used in aerospace, ship and other fields. Buckling instability is one of the most common failure modes for such structures under in-plane loading. This paper mainly includes employing higher order hierarchical theory as the deformation assumption of sandwich plate, building macroscopic displacement field envelope with Fourier series, and establishing macroscopic model of sandwich plate. The nonlinear system is solved by asymptotic numerical method. Then the model is used to simulate coupling phenomena of global buckling and local wrinkling, and study the influence of different geometric parameters and material parameters on buckling phenomena.