| About this Abstract |
| Meeting |
2018 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Design and Simulation of Materials (CDSM 2018): Computational Design of Materials
|
| Presentation Title |
Coupling Void Coalescence Criteria in Finite Element Models: Application to Tensile Test |
| Author(s) |
Ahmed Abdelkader, Chahinaz Saleh |
| On-Site Speaker (Planned) |
Ahmed Abdelkader |
| Abstract Scope |
Ductile fracture has been described by many models on different scales; namely, continuum, micro, miso & even on atomistic scales. The widely accepted model is the micromechanical phenomological , Gurson model.
Gurson assumes that material is porous with spherical voids. Under deformation, original voids grow & new voids are nucleated. Failure become pronounced in the third stage; coalescence. Coalescence mechanism occurs either by localized shear at ligaments between voids or by their preferential growth parallel to the axis of highest principal stress as reported in literature. Literature includes many void Coalescence models. The model proposed by Ragab is the concerned model in this study.
In this work, FEA is used to model materials obeying Gurson function on a uniaxial tensile test. The coalescence criterions are introduced to the FEA solver, Abaqus via a user subroutine. The onset of coalescence is determined and compared to experimental results. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |