|About this Abstract
||NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
||S-01: Modeling of the Anisotropic Behavior in Plasticity
||Springback Prediction in Roll Forming using Nonlinear Kinematic and Homogeneous Anisotropic Hardening Models
||Hyunsung Choi, Jeong Whan Yoon, Jongsup Lee, Geunho Kim
|On-Site Speaker (Planned)
Roll forming has been widely used to form steel sheet with low formability such as Ultra High Strength Steel (UHSS). It allows the steel sheet to be formed through successive bending process into a desired shape which even cannot be formed by press brake forming. Although the process effectively improves the formability of UHSS, there still the remains accuracy issue such as fracture, springback, flair, bow and so on. In this paper, the formability of 1.5 GPa grade steel in roll forming process was numerically investigated for automotive sill-side inner component. Eighteen successive roll stages were modelled for the numerical simulation with commercial software LS-DYNA. Forming Limit Diagram (FLD) based on Marciniak and Kuczynski and Fracture Forming Limit Diagram (FFLD) based on Lou-Huh model were used for the investigation. In addition, path independent FLD and FFLD were considered with Polar Effective Plastic Strain (PEPS) diagram.