| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Pires, Fma
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2023On the representativeness of polycrystalline models with transformation induced plasticitycitations
- 2022On the computational treatment of fully coupled crystal plasticity slip and martensitic transformation constitutive models at finite strainscitations
- 2022Consistent modeling of the coupling between crystallographic slip and martensitic phase transformation for mechanically induced loadingscitations
- 2021Homogenizing the Elastic Properties of Composite Material Using the NNRPIM
- 2020Torsional fretting wear experimental analysis of a R3 offshore steel against a PC/ABS blendcitations
- 2019The role of elastic anisotropy on the macroscopic constitutive response and yield onset of cubic oligo- and polycrystalscitations
- 2018Constitutive modelling of mechanically induced martensitic transformations Prediction of transformation surfacescitations
- 2016Intralaminar damage in polymer composites in the presence of finite fiber rotation: Part I - Constitutive modelcitations
- 2016Intralaminar damage in polymer composites in the presence of finite fiber rotation: Part II - Numerical analysis and validationcitations
- 2014Predicting the mechanical behavior of amorphous polymeric materials under strain through multi-scale simulationcitations
- 2014AN ALGORITHM TO GENERATE MICRO MECHANICAL MODELS COMPOSED BY CIRCULAR INCLUSIONS
- 2013A framework for product architecture and technology selection in competitive environment
- 2011A MICROMECHANICAL CONSTITUTIVE MODEL FOR DUCTILE FRACTURE: NUMERICAL TREATMENT AND CALIBRATION STRATEGY
- 2009Numerical modelling of the filament winding process
Places of action
| Organizations | Location | People |
|---|
document
A MICROMECHANICAL CONSTITUTIVE MODEL FOR DUCTILE FRACTURE: NUMERICAL TREATMENT AND CALIBRATION STRATEGY
Abstract
This contribution describes the numerical treatment and calibration strategy for a new micromechanical damage model, which employs two internal damage variables. The new micromechanical model is based on Gurson's theory incorporating the void volume fraction as one damage parameter and a shear mechanism, which was formulated considering geometrical and phenomenological aspects, as the second internal damage variable. The first and the second damage variables are coupled in the constitutive formulation in order to affect the hydrostatic stress and deviatoric stress contributions, respectively. Both internal damage variables are independent and, as a consequence, they also require independent nucleation mechanisms for each one in order to trigger the growth contribution. These mechanisms require the determination of material parameters that are obtained through two calibration points: one for high and the other for low stress triaxiality. This is in contrast to other damage models that typically require one calibration point. In the first part of this paper, theoretical aspects of the constitutive formulation are presented and discussed. Then, an implicit numerical integration algorithm is derived, based on the operator split methodology, together with a methodology to perform the calibration of all material parameters. In order to assess the performance of the new model, the "butterfly" specimen was used and the 1045 steel was employed under a wide range of stress triaxiality. The results obtained from the numerical simulations are presented such as: the evolution of both damage parameters, the evolution of the equivalent plastic strain, the reaction versus displacement curve and the contour of the effective damage parameter. From the comparison of the numerical results with experimental evidence, it will be highlighted that the present formulation is able to predict accurately the location of fracture onset and the level of the associated equivalent plastic strain at fracture.