Advances in LS-DYNA ® Metal Forming (II)

Some of the new features developed since the last conference will be discussed. 1) Implementation of Stoughton’s Non-Associate Flow Model (*MAT_260A) Strain rate sensitive, non-associated flow material model suitable for metal forming simulation. 2) Implementation of Mohr’s Non-Associate Flow Model (*MAT_260B) Strain rate sensitive and temperature softening effect coupled with a non-associated flow rule, combined with a ductile fracture model based on Hosford-Coulomb fracture initiation model, suitable for metal forming and crash simulation. 3) Best fitting of meshed (including STL) parts with *CONTROL_FORMING_BESTFIT Correlation study of simulated springback with scanned STL file made easy. 4) Tool mesh checking/fixing and physical offset of tools (*CONTROL_FORMING_AUTOCHECK) This feature fixes tooling meshes arising from bad tool CAD surfaces, automatically make tool normal consistent and in required orientation, and offsets the tool mesh to create an opposite side of the tool. 5) Formability Index (F.I.) extension to *MAT_036, *MAT_125 and *MAT_226). Predictions of sheet metal failure under non-linear strain paths are extended to aforementioned material models. 6) Implementation of a Cyclic Fatigue Modeling (*MAT_165B) A mixed isotropic and kinematic hardening model suitable for small strain cyclic fatigue modeling.