Experimental and numerical investigation on 6082 0 temper aluminium alloy cartridge tubes drawing

• The study deals with the drawing optimization of 6082 aluminium alloy.
• A fast and simple method based on triaxiality ratio concept was established.
• The fracture onset on a drawing operation may be predicted.
• The constitutive model was determined through mechanical tests and numerical simulation.
• A complex numerical simulation of the cartridge tube intermediate draw operation was achieved.

In order to test and evaluate the drawing efficiency of 6082 0 temper aluminium alloy for cartridge tubes, both experimental and numerical analyses were conducted. The theoretical assessment validation was performed by overlapping the graph of stress triaxiality ratio vs. plastic strain and the graph of 6082 0 temper aluminium alloy fracture envelope for a zero Lode parameter. The numerical simulation in Ls-Dyna® gave the stress triaxiality ratio vs. plastic strain correlation. With the view to defining the constitutive material model and fracture envelope, both experimental determinations and numerical simulations for plane stress and plane strain specimens were performed (tensile, shear and compression tests for various samples). The simulation results were compared with the experimental observations. The possibility of using the concept of triaxiality for a constant Lode parameter and an isotropic elastic/plastic material model in the field of drawing was also considered.