Analytical model to estimate force of constrained groove pressing process

Purpose of the present study was to estimate force of constrained groove pressing process using elastic-plastic relationships and some relations have been provided to calculate force of the process. In this research, behavior of sheet was examined and constrained groove pressing process was classified into three bending, stretching and forging steps. Then, the force of process was estimated using plasticity relationships and the results were compared to experimental data and finite element simulation. To investigate the effect of parameters of material and geometry, three different materials and two different geometries of die and sheet were compared together. According to the obtained results, presented relationships can predict the force during constrained groove pressing process for each material and geometry of sheet and die. Also, Von-Mises and Tresca yield criterion were examined and found that Von-Mises criterion can better estimate force of the process.