In-Plane Dynamics of Multilayer A-Type U-Shaped Corrugated Structure Materials

Abstract

The finite element methodology is conceived to obtain the mechanical parameters about dynamic performance of multilayer A-type U-shaped corrugated structure materials under the in-plane crushing loadings with various impact velocities. A simplified energy absorption model is proposed to evaluate the energy-absorption performance. The evaluation model shows that the optimal energy absorption per unit volume is mainly determined by the dynamic plateau stress. The homogeneous deformation mode, transition deformation mode and dynamic deformation mode are gradually observed with the increasing impact velocities. These three different deformation modes are presented in detail. The in-plane dynamic plateau stress depends on the impact velocity for the multilayer A-type U-shaped corrugated structure materials with a given fixed cell wall thickness. From the physical analysis and discussion of the numerical results, the empirical formula of dynamic plateau stress is suggested in terms of impact velocity.