Simulation of stress-strain state of tubular blank during expanding by axisymmetric die in ANSYS
The results of simulation of the stress-strain state of a thin-walled tubular blank made from aluminum alloy in the process of manufacturing a connecting pipe by distribution on a steel punch are presented in the ANSYS finite element software program. The axisymmetric punch in the form of a body of revolution with a curvilinear generatrix is considered. The problem is solved in a axisymmetric quasi-stationary formulation. The finite element model includes a punch and a tubular blank, the upper end of which is vertically moved downward, simulating the effect of a press rig that transmits force to the deformable part. The frictional interaction occurs according to Coulomb's law. The analysis of the stress-strain state in the billet-punch system is carried out. The influence of the thickness of the billet and its mechanical properties on the distribution of residual stresses, elastic springing after removal of the load and wall thinning was investigated.