NUMERICAL SIMULATION OF THE SPLITTING RING BENCHMARK TEST

SUMMARY: Springback is one of the major causes for fabrication parts rejection in sheet metal forming. This is a geometrical defect that occurs on the drawn part after removing all the stamping tools, and is caused by elastic strain recovery of the material. In this work, springback is evaluated with a benchmark test that consists on cutting a ring specimen from a drawn cup and then splitting it longitudinally along a radial plan. Numerical simulation results were obtained using the finite element code DD3IMP with the package DD3TRIM to perform the ring cuts and splitting. Finite element mesh sensitivity tests were done and results were post-processed with GID software.