Coupled identification of the hardening behavior laws and Gurson�Tvergaard�Needleman damage parameters - Validation on tear test of 12NiCr6 CT specimen
This work is devoted to the application of the micromechanical Gurson-Tvergaard-Needleman (GTN) model to study the ductile tearing of 12NiCr6 steel. GTN model is widely used to describe the three stages of ductile tearing: nucleation, growth and the coalescence of micro-voids. A new approach based o...
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| Format: | Article |
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Gruppo Italiano Frattura
2019-07-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2414/2622 |
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| author | Mohamed Hadj Miloud Ibrahim Zidane Mohammed Mendas |
| author_facet | Mohamed Hadj Miloud Ibrahim Zidane Mohammed Mendas |
| author_sort | Mohamed Hadj Miloud |
| collection | DOAJ |
| description | This work is devoted to the application of the micromechanical Gurson-Tvergaard-Needleman (GTN) model to study the ductile tearing of 12NiCr6 steel. GTN model is widely used to describe the three stages of ductile tearing: nucleation, growth and the coalescence of micro-voids. A new approach based on the identification of the GTN damage model coupled or not with hardening laws using inverse analysis. After identification, the obtained results show a good agreement between the experimental curve tensile test of an axisymetric notched bar (AN2) and those numerically obtained for GTN model coupled with the hardening laws. In order to validate the identified GTN parameters, a simulation of tear test is conducted on 12 NiCr6 steel CT specimen. The numerical results are compared with experimental results found in the literature and a good agreement is obtained. This identification procedure is more accurate than when the damage parameters are identified independently of the hardening laws. |
| format | Article |
| id | doaj-art-f4593a9c68f8463195084783f8695ec3 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2019-07-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-f4593a9c68f8463195084783f8695ec32025-01-02T23:01:36ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932019-07-01134963064210.3221/IGF-ESIS.49.5710.3221/IGF-ESIS.49.57Coupled identification of the hardening behavior laws and Gurson�Tvergaard�Needleman damage parameters - Validation on tear test of 12NiCr6 CT specimenMohamed Hadj MiloudIbrahim ZidaneMohammed MendasThis work is devoted to the application of the micromechanical Gurson-Tvergaard-Needleman (GTN) model to study the ductile tearing of 12NiCr6 steel. GTN model is widely used to describe the three stages of ductile tearing: nucleation, growth and the coalescence of micro-voids. A new approach based on the identification of the GTN damage model coupled or not with hardening laws using inverse analysis. After identification, the obtained results show a good agreement between the experimental curve tensile test of an axisymetric notched bar (AN2) and those numerically obtained for GTN model coupled with the hardening laws. In order to validate the identified GTN parameters, a simulation of tear test is conducted on 12 NiCr6 steel CT specimen. The numerical results are compared with experimental results found in the literature and a good agreement is obtained. This identification procedure is more accurate than when the damage parameters are identified independently of the hardening laws.https://www.fracturae.com/index.php/fis/article/view/2414/2622GTN modelHardening lawsInverse analysisFE modelingVUHARDductile fracture |
| spellingShingle | Mohamed Hadj Miloud Ibrahim Zidane Mohammed Mendas Coupled identification of the hardening behavior laws and Gurson�Tvergaard�Needleman damage parameters - Validation on tear test of 12NiCr6 CT specimen Fracture and Structural Integrity GTN model Hardening laws Inverse analysis FE modeling VUHARD ductile fracture |
| title | Coupled identification of the hardening behavior laws and Gurson�Tvergaard�Needleman damage parameters - Validation on tear test of 12NiCr6 CT specimen |
| title_full | Coupled identification of the hardening behavior laws and Gurson�Tvergaard�Needleman damage parameters - Validation on tear test of 12NiCr6 CT specimen |
| title_fullStr | Coupled identification of the hardening behavior laws and Gurson�Tvergaard�Needleman damage parameters - Validation on tear test of 12NiCr6 CT specimen |
| title_full_unstemmed | Coupled identification of the hardening behavior laws and Gurson�Tvergaard�Needleman damage parameters - Validation on tear test of 12NiCr6 CT specimen |
| title_short | Coupled identification of the hardening behavior laws and Gurson�Tvergaard�Needleman damage parameters - Validation on tear test of 12NiCr6 CT specimen |
| title_sort | coupled identification of the hardening behavior laws and gurson�tvergaard�needleman damage parameters validation on tear test of 12nicr6 ct specimen |
| topic | GTN model Hardening laws Inverse analysis FE modeling VUHARD ductile fracture |
| url | https://www.fracturae.com/index.php/fis/article/view/2414/2622 |
| work_keys_str_mv | AT mohamedhadjmiloud coupledidentificationofthehardeningbehaviorlawsandgursontvergaardneedlemandamageparametersvalidationonteartestof12nicr6ctspecimen AT ibrahimzidane coupledidentificationofthehardeningbehaviorlawsandgursontvergaardneedlemandamageparametersvalidationonteartestof12nicr6ctspecimen AT mohammedmendas coupledidentificationofthehardeningbehaviorlawsandgursontvergaardneedlemandamageparametersvalidationonteartestof12nicr6ctspecimen |