Analysis of Elastic Recovery in The Process of Bending Sheets of Duplex Steel SAF 2205 via Experimental Method and Numerical Simulation

The mechanical conformation is widely used in metal materials manufacture, being the bending process one of the most applied in the metal-mechanical industry. The material behavior analysis is important in this kind of process, since fabrication problems can compromise the final performance of bent components. During the bending process of metal sheets, the sheet undergoes a geometric variation after the withdrawal of the load. This effect, as known as elastic recovery, can be harmful when it is needed to fit two components with low tolerances. The comparative between elastic recovery problem analyses in folded sheets by numerical simulation and the experimental method seeks to anticipate possible inconveniences and additional costs during the try out tests. The numerical results are compared with the experimental laboratory tests. The contact and the interaction between the tool components and the sample boundary conditions are evaluated. Thereby, we consider the aspects necessary for modeling the elastic recovery in agreement with the experimental test, obtaining a very close result between the two methods.