Localized Necking Model for Punching Fracture Simulation in Unstiffened and Stiffened Panels
The ductile fracture of thin-shell structures was studied here using a localized necking model. The punching experiments for unstiffened and stiffened panels were compared with numerical predictions using a combined ductile fracture and localized necking model using shell elements. The plasticity an...
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| Format: | Article |
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MDPI AG
2021-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/9/3774 |
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| author | Sung-Ju Park Kookhyun Kim |
| author_facet | Sung-Ju Park Kookhyun Kim |
| author_sort | Sung-Ju Park |
| collection | DOAJ |
| description | The ductile fracture of thin-shell structures was studied here using a localized necking model. The punching experiments for unstiffened and stiffened panels were compared with numerical predictions using a combined ductile fracture and localized necking model using shell elements. The plasticity and fracture model parameters of JIS G3131 SPHC steel were identified by performing calibration experiments on standard flat bars, notched tension, central hole tension, plane strain tension, and shear specimens. The plasticity beyond the onset of necking was modeled using the Swift hardening law. The damage indicator framework with a combined Hosford–Coulomb fracture model and the domain of shell-to-solid equivalence (DSSE) were adopted to characterize the fracture initiation. The model parameters were calibrated based on the loading paths to fracture initiation, which were extracted from a non-linear finite element (FE) analysis. The presented HC–DSSE model was validated using punch tests and was able to predict fracture initiation with good accuracy. |
| first_indexed | 2024-03-10T12:05:19Z |
| format | Article |
| id | doaj.art-fe94c4884539451d949af33a4ca28295 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T12:05:19Z |
| publishDate | 2021-04-01 |
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| series | Applied Sciences |
| spelling | doaj.art-fe94c4884539451d949af33a4ca282952023-11-21T16:39:28ZengMDPI AGApplied Sciences2076-34172021-04-01119377410.3390/app11093774Localized Necking Model for Punching Fracture Simulation in Unstiffened and Stiffened PanelsSung-Ju Park0Kookhyun Kim1School of Naval Architecture and Ocean Engineering, Tongmyong University, Busan 48520, KoreaSchool of Naval Architecture and Ocean Engineering, Tongmyong University, Busan 48520, KoreaThe ductile fracture of thin-shell structures was studied here using a localized necking model. The punching experiments for unstiffened and stiffened panels were compared with numerical predictions using a combined ductile fracture and localized necking model using shell elements. The plasticity and fracture model parameters of JIS G3131 SPHC steel were identified by performing calibration experiments on standard flat bars, notched tension, central hole tension, plane strain tension, and shear specimens. The plasticity beyond the onset of necking was modeled using the Swift hardening law. The damage indicator framework with a combined Hosford–Coulomb fracture model and the domain of shell-to-solid equivalence (DSSE) were adopted to characterize the fracture initiation. The model parameters were calibrated based on the loading paths to fracture initiation, which were extracted from a non-linear finite element (FE) analysis. The presented HC–DSSE model was validated using punch tests and was able to predict fracture initiation with good accuracy.https://www.mdpi.com/2076-3417/11/9/3774ductile fracturelocalized neckingpunch testsfracture simulationdomain of shell-to-solid equivalenceHosford-Coulomb model |
| spellingShingle | Sung-Ju Park Kookhyun Kim Localized Necking Model for Punching Fracture Simulation in Unstiffened and Stiffened Panels Applied Sciences ductile fracture localized necking punch tests fracture simulation domain of shell-to-solid equivalence Hosford-Coulomb model |
| title | Localized Necking Model for Punching Fracture Simulation in Unstiffened and Stiffened Panels |
| title_full | Localized Necking Model for Punching Fracture Simulation in Unstiffened and Stiffened Panels |
| title_fullStr | Localized Necking Model for Punching Fracture Simulation in Unstiffened and Stiffened Panels |
| title_full_unstemmed | Localized Necking Model for Punching Fracture Simulation in Unstiffened and Stiffened Panels |
| title_short | Localized Necking Model for Punching Fracture Simulation in Unstiffened and Stiffened Panels |
| title_sort | localized necking model for punching fracture simulation in unstiffened and stiffened panels |
| topic | ductile fracture localized necking punch tests fracture simulation domain of shell-to-solid equivalence Hosford-Coulomb model |
| url | https://www.mdpi.com/2076-3417/11/9/3774 |
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