Modelling of ductile fracture in single point incremental forming using a modified GTN model
Understanding the deformation and failure mechanisms in single point incremental forming (SPIF) is of great importance for achieving improved formability. Furthermore, there will be added benefits for more in depth evaluation of the effect of localised deformation to the fracture mechanism in SPIF....
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| Format: | Article |
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Elsevier
2017
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| Online Access: | https://eprints.nottingham.ac.uk/47304/ |
| _version_ | 1848797512235745280 |
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| author | Gatea, Shakir Ou, Hengan Lu, Bin McCartney, Graham |
| author_facet | Gatea, Shakir Ou, Hengan Lu, Bin McCartney, Graham |
| author_sort | Gatea, Shakir |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Understanding the deformation and failure mechanisms in single point incremental forming (SPIF) is of great importance for achieving improved formability. Furthermore, there will be added benefits for more in depth evaluation of the effect of localised deformation to the fracture mechanism in SPIF. Although extensive research has been carried out in recent years, questions still remain on the shear and particularly its effect to the formability in SPIF processes. In this work, a modified Gurson–Tvergaard-Needleman (GTN) damage model was developed with the consideration of shear to predict ductile fracture in the SPIF process due to void nucleation and coalescence with results compared with original GTN model in SPIF. A combined approach of experimental testing and SPIF processing was used to validate finite element results of the shear modified Gurson–Tvergaard-Needleman damage model. The results showed that the shear modified GTN model improved the modelling accuracy of fracture over the original GTN model under shear loading conditions. Furthermore, the shear plays a role under meridional tensile stress to accelerate fracture propagation in SPIF processes. |
| first_indexed | 2025-11-14T20:05:03Z |
| format | Article |
| id | nottingham-47304 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:05:03Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-473042020-05-04T19:53:55Z https://eprints.nottingham.ac.uk/47304/ Modelling of ductile fracture in single point incremental forming using a modified GTN model Gatea, Shakir Ou, Hengan Lu, Bin McCartney, Graham Understanding the deformation and failure mechanisms in single point incremental forming (SPIF) is of great importance for achieving improved formability. Furthermore, there will be added benefits for more in depth evaluation of the effect of localised deformation to the fracture mechanism in SPIF. Although extensive research has been carried out in recent years, questions still remain on the shear and particularly its effect to the formability in SPIF processes. In this work, a modified Gurson–Tvergaard-Needleman (GTN) damage model was developed with the consideration of shear to predict ductile fracture in the SPIF process due to void nucleation and coalescence with results compared with original GTN model in SPIF. A combined approach of experimental testing and SPIF processing was used to validate finite element results of the shear modified Gurson–Tvergaard-Needleman damage model. The results showed that the shear modified GTN model improved the modelling accuracy of fracture over the original GTN model under shear loading conditions. Furthermore, the shear plays a role under meridional tensile stress to accelerate fracture propagation in SPIF processes. Elsevier 2017-12 Article PeerReviewed Gatea, Shakir, Ou, Hengan, Lu, Bin and McCartney, Graham (2017) Modelling of ductile fracture in single point incremental forming using a modified GTN model. Engineering Fracture Mechanics, 186 . pp. 59-79. ISSN 0013-7944 GTN damage model; SPIF; Shear mechanism; Finite element method http://www.sciencedirect.com/science/article/pii/S0013794417307865 doi:10.1016/j.engfracmech.2017.09.021 doi:10.1016/j.engfracmech.2017.09.021 |
| spellingShingle | GTN damage model; SPIF; Shear mechanism; Finite element method Gatea, Shakir Ou, Hengan Lu, Bin McCartney, Graham Modelling of ductile fracture in single point incremental forming using a modified GTN model |
| title | Modelling of ductile fracture in single point incremental forming using a modified GTN model |
| title_full | Modelling of ductile fracture in single point incremental forming using a modified GTN model |
| title_fullStr | Modelling of ductile fracture in single point incremental forming using a modified GTN model |
| title_full_unstemmed | Modelling of ductile fracture in single point incremental forming using a modified GTN model |
| title_short | Modelling of ductile fracture in single point incremental forming using a modified GTN model |
| title_sort | modelling of ductile fracture in single point incremental forming using a modified gtn model |
| topic | GTN damage model; SPIF; Shear mechanism; Finite element method |
| url | https://eprints.nottingham.ac.uk/47304/ https://eprints.nottingham.ac.uk/47304/ https://eprints.nottingham.ac.uk/47304/ |