| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
Phase-field Modelling of Ductile Fracture to Describe Edge Conditions in Local Formability Studies |
| Author(s) |
Fabio Di Gioacchino, John G Speer, Kester D Clarke |
| On-Site Speaker (Planned) |
Fabio Di Gioacchino |
| Abstract Scope |
By introducing a diffuse crack representation that depends on the critical energy release rate and an intrinsic length scale, phase-field modeling of fracture provides the framework for the formulation of physically-based gradient damage models that can be efficiently implemented in finite element calculations. Recently, we used the open-source FEniCS finite element computing platform to implement a phase-field model of ductile fracture. Here, we simulate expansion tests of punched and machined holes in sheets of advanced high strength steels. The different hole-edge conditions are described using initial boundary conditions for phase fields of damage and accumulated plastic strain. The value of the intrinsic length scale thus controls the thickness of the shear affected zone. Predictive capabilities are assessed by comparison with experimental measurements of hole expansion ratios. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |