About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Techniques for Multi-Scale Modeling in Advanced Manufacturing
|
Presentation Title |
Modeling Material Behavior during Continuous Bending Under Tension for Inferring the Post-necking Strain Hardening Response of Ductile Sheet Metals: Application to Dual-phase Steels |
Author(s) |
Marko Knezevic, Russell E Marki |
On-Site Speaker (Planned) |
Marko Knezevic |
Abstract Scope |
Continuous bending under tension (CBT) can stretch ductile sheet metals significantly more than simple tension (ST). Strength and plastic strain levels increase with the number of CBT cycles and substantially exceed those achieved in ST. Taking advantages of the improved elongation-to-fracture achieved by CBT, samples of dual-phase (DP) 590, 780, 980, and 1180 steels are pre-deformed to several strain levels by interrupting their CBT testing. Sub-size specimens are machined from the CBT interrupted specimens and tested in ST. The flow curves from these secondary ST tests are then shifted according to the axial strain accumulated during pre-deformation by CBT to determine large strain (post-necking) flow curve of the materials. The identified large strain flow curves are validated by simulate the load versus displacement curves during CBT and the flow curves based on the secondary ST testing using appropriate constitutive laws in finite elements demonstrating the utility of the developed methodology. |
Proceedings Inclusion? |
Planned: |