Simulating The Dynamic Deformation Behaviour Of Selective Laser Melted Stainless Steel Microlattice Structures

Abstract

A full scale 3D finite element model was developed to simulate the dynamic deformation behaviour of stainless steel 316L microlattice structures manufactured by the selective laser melting technique. The experiments were performed in the modified split-Hopkinson pressure bars to validate the model. The prediction reveals that plastic strains occur and accumulate near the nodal joints, resulting in the nearly plateau region in the stress–strain curve. The dynamic behaviour of the microlattice was then compared to the low rate response. It was found that the compressive stress–strain behaviour is influenced by the strain rate.