Numerical simulation of forming titanium drawn part

Structure weight is a priority issue in the transport industry, especially in aviation, therefore the demand for drawn parts made of titanium has grown steadily. Titanium in comparison to steel and aluminium has a much more beneficial specific strength so it is used where high mechanical strength and low construction weight are especially essential. In view of its high melting temperature, titanium is also used for aircraft fire walls. Although titanium has excellent properties such as high strength, low weight and good corrosion resistance, it is very difficult in production and processing. There are many technological problems that have to be overcome in forming titanium sheets. Titanium, especially titanium alloy sheets have poor drawability, high springback and low tribological properties. In the paper, the numerical analysis of forming a titanium panel made of commercially pure Gr 2 titanium is presented. The numerical simulation has been performed using the PamStamp program, dedicated to sheet-metal forming, based on the finite element method. In addition to the stress and strain distribution being analysed, the influence of the holding-down force and frictional conditions on the forming process are examined. The quality of the obtained titanium drawn-part is assessed basing on the correctness of its shape and dimensions with the reference ones, as well as on material thinning.