Springback Prediction Performance and Experimental Analysis in the V-bending Process of SCGADUB1180 Advanced High-Strength Steel

Abstract

This study investigated the V-bending process of 1.2 mm thick SCGADUB1180 advanced-high-strength steel sheet plate by experimental and finite element method, and its springback behaviour was investigated in detail. In the experiments, 27 different V-bending experiments were modeled in three different punch radii (3mm, 6mm, 9mm), three different bending angle values (60°, 90° 120°), three different rolling directions (0°, 45°, 90°). In the experiments created with these input parameters, the effect of the sheets on the springback was investigated by comparing the experimental data with different material models. 108 analyses were performed for four different finite element models (Hill-48, Barlat-89, Hill-48-kinematic, Barlat-89kinematic). It was analyzed that the Barlat-89-kinematic strain hardening model was the closest model to the experimental results. In addition, with the help of the Minitab 18.0 statistics program, how well the finite element model data agreed with the experimental results was analyzed. It was observed that the variation of punch radius (83.03%) and bending angle (8.51%) had a significant effect on the springback behaviour of the sheet. As the punch radius increased, the springback values increased. At the highest parameter level, where the bending angle was 120°, the springback values decreased. The highest springback occurred at 90° bending angle..