Size effect during dynamic shear tests with hat-shaped specimens
The failure mechanism and size effect during the quasi-static and dynamic shear tests of hat-shaped specimens were investigated in this study. Three types of specimens with different shear ring thicknesses (800, 400, and 50 μm) were designed. Quasi-static tests were carried out using an electronic u...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423025899 |
| _version_ | 1827346154065494016 |
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| author | Lan Yan Anna Jiang Zhibin Wang Feng Jiang Fuzeng Wang Xian Wu Yong Zhang |
| author_facet | Lan Yan Anna Jiang Zhibin Wang Feng Jiang Fuzeng Wang Xian Wu Yong Zhang |
| author_sort | Lan Yan |
| collection | DOAJ |
| description | The failure mechanism and size effect during the quasi-static and dynamic shear tests of hat-shaped specimens were investigated in this study. Three types of specimens with different shear ring thicknesses (800, 400, and 50 μm) were designed. Quasi-static tests were carried out using an electronic universal testing machine, while dynamic impact tests were carried out using split Hopkinson pressure bar (SHPB) tests. The adiabatic temperature rises with different strain rates, and the shear ring thickness was calculated. We found that the adiabatic temperature rises of the specimens with shear ring thicknesses of 800 and 400 μm were much larger than those of the specimens with shear ring thicknesses of 50 μm. The failure surfaces after the SHPB test were investigated via scanning electron microscopy, and the failure surfaces after the SHPB test could be divided into three zones: tensile, shear, and impact zones. The effect of the shear ring thickness and impact speed on the failure surface morphology was discussed. The typical shear stress–strain curves could be divided into three sections: elastic, plastic rise, and plastic plateau sections. Subsequently, a modified Johnson–Cook constitutive model was employed to fit the shear stress–strain results, and the fitted curves showed good agreement with the tested curves. |
| first_indexed | 2024-03-07T23:23:58Z |
| format | Article |
| id | doaj.art-8f13851e9e3248cfa1c71c6f2469aded |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-07T23:23:58Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-8f13851e9e3248cfa1c71c6f2469aded2024-02-21T05:26:27ZengElsevierJournal of Materials Research and Technology2238-78542023-11-012732313242Size effect during dynamic shear tests with hat-shaped specimensLan Yan0Anna Jiang1Zhibin Wang2Feng Jiang3Fuzeng Wang4Xian Wu5Yong Zhang6College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361011, ChinaCollege of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361011, ChinaShanxi Diesel Industry Limited Responsibility Company, Datong 037036, ChinaInstitute of Manufacturing Engineering, Huaqiao University, Xiamen 361021, China; Corresponding author.Institute of Manufacturing Engineering, Huaqiao University, Xiamen 361021, ChinaCollege of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361011, ChinaCollege of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361011, ChinaThe failure mechanism and size effect during the quasi-static and dynamic shear tests of hat-shaped specimens were investigated in this study. Three types of specimens with different shear ring thicknesses (800, 400, and 50 μm) were designed. Quasi-static tests were carried out using an electronic universal testing machine, while dynamic impact tests were carried out using split Hopkinson pressure bar (SHPB) tests. The adiabatic temperature rises with different strain rates, and the shear ring thickness was calculated. We found that the adiabatic temperature rises of the specimens with shear ring thicknesses of 800 and 400 μm were much larger than those of the specimens with shear ring thicknesses of 50 μm. The failure surfaces after the SHPB test were investigated via scanning electron microscopy, and the failure surfaces after the SHPB test could be divided into three zones: tensile, shear, and impact zones. The effect of the shear ring thickness and impact speed on the failure surface morphology was discussed. The typical shear stress–strain curves could be divided into three sections: elastic, plastic rise, and plastic plateau sections. Subsequently, a modified Johnson–Cook constitutive model was employed to fit the shear stress–strain results, and the fitted curves showed good agreement with the tested curves.http://www.sciencedirect.com/science/article/pii/S2238785423025899Hat-shaped specimenSize effectFailure mechanismSplit Hopkinson pressure barModified Johnson–Cook constitutive model |
| spellingShingle | Lan Yan Anna Jiang Zhibin Wang Feng Jiang Fuzeng Wang Xian Wu Yong Zhang Size effect during dynamic shear tests with hat-shaped specimens Journal of Materials Research and Technology Hat-shaped specimen Size effect Failure mechanism Split Hopkinson pressure bar Modified Johnson–Cook constitutive model |
| title | Size effect during dynamic shear tests with hat-shaped specimens |
| title_full | Size effect during dynamic shear tests with hat-shaped specimens |
| title_fullStr | Size effect during dynamic shear tests with hat-shaped specimens |
| title_full_unstemmed | Size effect during dynamic shear tests with hat-shaped specimens |
| title_short | Size effect during dynamic shear tests with hat-shaped specimens |
| title_sort | size effect during dynamic shear tests with hat shaped specimens |
| topic | Hat-shaped specimen Size effect Failure mechanism Split Hopkinson pressure bar Modified Johnson–Cook constitutive model |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423025899 |
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