A Method of Images to Study Plate-Impact-Induced Cavitation in Aluminum through Molecular Dynamics Simulation
The tensile stress generated by the superposition of two reflection waves in the target plays a critical role in explaining plate-impact-induced spalling. A method of images is proposed to simulate the physical process of wave superposition and this method is applied in order to study the cavitation...
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MDPI AG
2024-09-01
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| author | Yingzhen Jiang Ziyang Ma Haijian Chu Huiling Duan |
| author_facet | Yingzhen Jiang Ziyang Ma Haijian Chu Huiling Duan |
| author_sort | Yingzhen Jiang |
| collection | DOAJ |
| description | The tensile stress generated by the superposition of two reflection waves in the target plays a critical role in explaining plate-impact-induced spalling. A method of images is proposed to simulate the physical process of wave superposition and this method is applied in order to study the cavitation mechanism in single-crystal Al through molecular dynamics simulation. The critical impact-load velocity for the cavitation obtained by this method is as small as 400 m/s, which is much lower than the result (650 m/s) obtained by the conventional piston-load method. The new cavitation mechanism found is distinctively different from the conventional dislocation-entanglement-induced cavitation under high-velocity impact. The new mechanism involves two key events: firstly, a crack-like defect is formed and its relevant atomic bonds are broken under high tensile stress, resulting in a great momentum of related atoms; and secondly, previous high-momentum atoms collide with the atoms in their running way, resulting in the destruction of the original FCC structure locally and nanovoids or penny-shaped voids being formed. Additionally, the cavitation region, the number of voids, and delamination surfaces increases with the impact-load rate. |
| format | Article |
| id | doaj-art-d116c33cbcd84d51bce55de191859d5c |
| institution | OA Journals |
| issn | 2075-4701 |
| language | English |
| publishDate | 2024-09-01 |
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| spelling | doaj-art-d116c33cbcd84d51bce55de191859d5c2025-08-20T01:55:41ZengMDPI AGMetals2075-47012024-09-01149106910.3390/met14091069A Method of Images to Study Plate-Impact-Induced Cavitation in Aluminum through Molecular Dynamics SimulationYingzhen Jiang0Ziyang Ma1Haijian Chu2Huiling Duan3Department of Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, ChinaDepartment of Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, ChinaDepartment of Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, ChinaState Key Laboratory for Turbulence and Complex System, Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, ChinaThe tensile stress generated by the superposition of two reflection waves in the target plays a critical role in explaining plate-impact-induced spalling. A method of images is proposed to simulate the physical process of wave superposition and this method is applied in order to study the cavitation mechanism in single-crystal Al through molecular dynamics simulation. The critical impact-load velocity for the cavitation obtained by this method is as small as 400 m/s, which is much lower than the result (650 m/s) obtained by the conventional piston-load method. The new cavitation mechanism found is distinctively different from the conventional dislocation-entanglement-induced cavitation under high-velocity impact. The new mechanism involves two key events: firstly, a crack-like defect is formed and its relevant atomic bonds are broken under high tensile stress, resulting in a great momentum of related atoms; and secondly, previous high-momentum atoms collide with the atoms in their running way, resulting in the destruction of the original FCC structure locally and nanovoids or penny-shaped voids being formed. Additionally, the cavitation region, the number of voids, and delamination surfaces increases with the impact-load rate.https://www.mdpi.com/2075-4701/14/9/1069a method of imagesimpact-induced spallingcavitation mechanismmolecular simulation |
| spellingShingle | Yingzhen Jiang Ziyang Ma Haijian Chu Huiling Duan A Method of Images to Study Plate-Impact-Induced Cavitation in Aluminum through Molecular Dynamics Simulation Metals a method of images impact-induced spalling cavitation mechanism molecular simulation |
| title | A Method of Images to Study Plate-Impact-Induced Cavitation in Aluminum through Molecular Dynamics Simulation |
| title_full | A Method of Images to Study Plate-Impact-Induced Cavitation in Aluminum through Molecular Dynamics Simulation |
| title_fullStr | A Method of Images to Study Plate-Impact-Induced Cavitation in Aluminum through Molecular Dynamics Simulation |
| title_full_unstemmed | A Method of Images to Study Plate-Impact-Induced Cavitation in Aluminum through Molecular Dynamics Simulation |
| title_short | A Method of Images to Study Plate-Impact-Induced Cavitation in Aluminum through Molecular Dynamics Simulation |
| title_sort | method of images to study plate impact induced cavitation in aluminum through molecular dynamics simulation |
| topic | a method of images impact-induced spalling cavitation mechanism molecular simulation |
| url | https://www.mdpi.com/2075-4701/14/9/1069 |
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