Advance in Sheet Metal Forming - Failure Criteria, Friction, Scrap Trimming and Adaptive Meshing

Some of the new features developed since the last conference will be discussed. 1)Directional and pressure sensitive friction model for metal forming Developed together with Ford Motor Research and Advanced Engineering Laboratory, this feature enables definition of Coulomb frictions in any directions in the sheet plane. The friction coefficients can also be scaled based on the contact pressure incurred during the stamping process. 2)Failure criterion for the non-linear strain path for *MAT_036 Developed as a part of the ASP-NSP project, the previously known Formability Index (F.I.) is now implemented together with *MAT_036. Verification of the model will be discussed. 3)Contact-based scrap trimming function Developed together with Ford Motor Company, this powerful feature allows realistic scrap trimming simulation and contact-based kinematic and dynamic transfer from the trim steels to the trimmed scraps. 4)Pre-adaptive along curves for line-die simulation Developed together with Chrysler LLC, a region of user specified size can now be defined for mesh adaptivity along a curve for subsequent line-die simulation.