Experiment and Static Implicit Analysis of Springback in Bend Forming of a Bumper Model

摘要

Experiments on bend forming of a bumper model with a 9.8-MN oil-hydraulic press and FEM analysis with the static code MARC were carried out in order to investigate springback behavior. The materials used were three types of high-strength steel sheets (HSS) of 440-780-MPa class. Experimental springback shapes were investigated using a 3-D measuring machine. The springback of a formed bumper increased with an increase in yield stress (YS) of the material, coinciding with the results of 2-D FEM simulation.