A physical mechanism based investigation on the elasto-plastic-damage behavior of anisotropic aluminum alloys under finite deformation

The elasto-plastic-damage behavior of anisotropic aluminum alloys is investigated under finite deformation using a physical mechanism based constitutive model. With an application to the structural calculation, the present model is used to describe and analyze the mechanical response of anisotropic 6260-T6 aluminum alloy extrusions. For the tensile specimens extracted along three different material orientations from the extruded aluminum profile, twelve simulations are carried out covering four different specimen geometries. The simulation results in force-displacement response and central logarithmic axial strain evo- lution are compared with experimental results. From the comparisons, it can be concluded that the present model has the ca- pacity to describe the behavior of anisotropic material. From the force-displacement curves, the anisotropy is observed in dif- ferent material orientations, and the physical mechanism of anisotropy is analyzed.