Simulation of Effect of Loading Rate on Compression Properties in the Two-Dimensional Model of Aluminum Foam Sandwich Panels

Abstract

A two-dimensional finite element model of aluminum foam sandwich (AFS) panels was approximated by combing C++ and ANSYS/LSDYNA software to represent the shapes of the cells and geometric distributions. Under different loading rates, the deformation behavior, shock wave propagation process, inertial effect and stress of the bottom of the model of AFS panels are discussed resulting from simulation. We found that plastic deformation in the model first occurs in a weak section in the quasi-static compression simulation, whereas the local densification is obvious during the high-speed impact process. The results also indicate that the speed of the plastic wave, locking density and locking strain increase respectively with increasing loading rate. In addition, under the loading rate 80m/s, the model can be compressed after the plastic wave reaches the bottom of the model during the process of deformation due to the reflection of the plastic wave, whereas the plateau stress rises with an increase in the loading rate.