Description
Plenary Lecture:Abstract - With the increasing need of energy saving and CO2 emission reductions to deal with the problem of climate changes, light-weighting vehicles become more and more important. Thus ultra-high strength steels and light alloys are used to reduce component weights. These materials have low ductility at room temperature and are very difficult to stamp into complex-shaped panel engineering components. Thus hot stamping techniques have been developed for the forming of ultra-high strength steels and high-strength aluminium alloys. To optimise the forming processes, new experimental methods need to be developed to characterize mechanical properties of materials under the corresponding hot stamping conditions. This research focuses on uniaxial tensile tests for the characterization of the thermomechanical behaviour of materials, with the use of deep machine learning methods to get better material data, and biaxial tensile tests for the evaluation of materials forming and fracture limits under hot stamping conditions, with the particular concentration of Boron steel and aluminium alloys. These testing methods have been improved in recent years. Uncertainties and possible errors of the test results are analyzed. Based on the experimental results, a set of new viscoplastic damage constitutive equations has been developed to predict viscoplastic flow, forming limits and fracture limits of metal sheets at hot stamping conditions.
| Period | 1 Jun 2025 → 5 Jun 2025 |
|---|---|
| Event title | 44th Conference of the International Deep Drawing Research Group, IDDRG 2025 |
| Event type | Conference |
| Location | Lisbon, PortugalShow on map |
| Degree of Recognition | International |