Influence of Anisotropic Texture on Crushing Behavior of Square Tubes

Abstract

The crushing behavior of polycrystalline metallic square tubes under constant rate axial loading condition is investigated through a mesoscale crystal plasticity model embedded in an explicit finite element simulation code. The anisotropic texture is due to induced large plastic deformation created during the manufacturing process. To model the effect of orientation pattern in crystal structures, a single element model is used to simulate the load path under basic loading conditions including uniaxial tension and compression and simple shear to generate anisotropic texture patterns for use in crush simulations of square tubes. The initial texture information is then used in explicit crush simulations of a square tube made of an aluminum alloy. As energy absorption is dominated by the plastic collapse mechanisms at the corner elements, the influence of anisotropic texture and the evolution of grain orientation are found to be significant.