Formability limit prediction of TRIP780 steel sheet using lode angle dependent Gurson-based models with Thomason coalescence criterion and bifurcation analysis
| Autor: | Farid Abed-Meraim, Hocine Chalal, Muhammad Waqar Nasir |
|---|---|
| Přispěvatelé: | Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3), Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Department of Mechanical Engineering, University of Engineering and Technology, Lahore, 54000, Pakistan, Arrazola P., Saenz de Argandona E., Otegi N., Mendiguren J., Saez de Buruaga M., Madariaga A., Galdos L. |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
[PHYS.MECA.GEME]Physics [physics]/Mechanics [physics]/Mechanical engineering [physics.class-ph] Mechanical properties 02 engineering and technology [SPI]Engineering Sciences [physics] 0203 mechanical engineering Bifurcation analysis [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] [PHYS.MECA.SOLID]Physics [physics]/Mechanics [physics]/Solid mechanics [physics.class-ph] Formability Composite material Mécanique: Mécanique des matériaux [Sciences de l'ingénieur] Coalescence (physics) Lode Phase space methods [PHYS.MECA]Physics [physics]/Mechanics [physics] Sheet metal forming 021001 nanoscience & nanotechnology 020303 mechanical engineering & transports Lode parameter Thomason coalescence criterion visual_art Materials forming visual_art.visual_art_medium sense organs GTN damage model 0210 nano-technology Sheet metal |
| Zdroj: | Proceedings of the 22nd International ESAFORM Conference on Material Forming (ESAFORM 2019) 22nd International ESAFORM Conference on Material Forming (ESAFORM 2019) 22nd International ESAFORM Conference on Material Forming (ESAFORM 2019), May 2019, Vitoria-Gasteiz, Spain. ⟨10.1063/1.5112706⟩ |
| DOI: | 10.1063/1.5112706⟩ |
| Popis: | International audience; For biaxial stretching strain paths, which are typically encountered in sheet metal forming, the stress triaxiality ranges from 0.33 to 0.67. At this low level of triaxiality, voids change their shape from spherical to general spheroidal shape. In the literature, unit cell studies show the dependency of void shape on the lode parameter, especially at low stress triaxiality. Several authors also pointed out the influence of lode parameter on ductile failure. In the current study, lode parameter dependent Gurson-based models are combined with bifurcation analysis for the prediction of formability limits of TRIP780 steel sheet. Moreover, Thomason’s coalescence criterion is considered for the prediction of critical porosity. For the anisotropic plastic behavior of the dense material, the quadratic Hill’48 yield surface is considered. Contribution to porosity evolution due to shear mechanism is also analyzed. In addition, the effect of lode parameter on the prediction of forming limit diagram (FLD) is investigated. It is observed that the accelerated evolution of porosity, due to the consideration of lode parameter, induces lower ductility limits for the modified Gurson-based model, as compared to the original Gurson model. The results also demonstrate that the use of the Thomason coalescence criterion for the determination of critical porosity plays an important role in the prediction of FLDs, as compared to fixed critical porosity used in the Gurson-Tvergaard-Needleman model. |
| Databáze: | OpenAIRE |
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