Impact Mechanical Properties of Magnesium Alloy Structures with Annularly Distributed Multi-Sphere Point Contacts
When a high-speed rotating projectile faces high impact loads, the sensitive parts of the control system can get damaged, resulting in operational failure. It is crucial to develop a unique buffer structure that offers impact resistance and has a small contact area. An annularly distributed multi-sp...
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MDPI AG
2025-07-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/15/7/665 |
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| author | Xiaoting Sun Guibo Yu Qiao Ma Yi Wang Wei Wang |
| author_facet | Xiaoting Sun Guibo Yu Qiao Ma Yi Wang Wei Wang |
| author_sort | Xiaoting Sun |
| collection | DOAJ |
| description | When a high-speed rotating projectile faces high impact loads, the sensitive parts of the control system can get damaged, resulting in operational failure. It is crucial to develop a unique buffer structure that offers impact resistance and has a small contact area. An annularly distributed multi-sphere point contact structure was designed and fabricated on a magnesium alloy substrate based on the Hertz contact theory. The accuracy of the finite element numerical model, constructed using Abaqus/Explicit, was verified through hydraulic impact tests. The impact mechanical properties of the structure were studied by analyzing the influence of the number, diameter, and cavity radius of hemispheres using an experimentally verified finite element model. The axial and radial deformations of the structure were compared and analyzed. The research findings indicate that the deformation and impact resistance of the structure can be greatly influenced by increasing the number of hemispheres, enlarging the hemisphere diameter, and incorporating internal cavities. Specifically, with 6 hemispheres, each with a diameter of Φ 6 mm and a cavity radius of R1.5 mm, the axial and radial deformations are only 1.03 mm and 3.02 mm, respectively. The contact area of a single hemisphere is 7.16 mm<sup>2</sup>. The study offers new perspectives on choosing buffer structures in high-impact environments. |
| format | Article |
| id | doaj-art-a4e2b9bc9e0a490a9c842c0ad23b62d1 |
| institution | Kabale University |
| issn | 2073-4352 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
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| series | Crystals |
| spelling | doaj-art-a4e2b9bc9e0a490a9c842c0ad23b62d12025-08-20T03:36:18ZengMDPI AGCrystals2073-43522025-07-0115766510.3390/cryst15070665Impact Mechanical Properties of Magnesium Alloy Structures with Annularly Distributed Multi-Sphere Point ContactsXiaoting Sun0Guibo Yu1Qiao Ma2Yi Wang3Wei Wang4Shijiazhuang Campus, Army Engineering University of PLA, Shijiazhuang 050003, ChinaShijiazhuang Campus, Army Engineering University of PLA, Shijiazhuang 050003, ChinaShijiazhuang Campus, Army Engineering University of PLA, Shijiazhuang 050003, ChinaShijiazhuang Campus, Army Engineering University of PLA, Shijiazhuang 050003, ChinaShijiazhuang Campus, Army Engineering University of PLA, Shijiazhuang 050003, ChinaWhen a high-speed rotating projectile faces high impact loads, the sensitive parts of the control system can get damaged, resulting in operational failure. It is crucial to develop a unique buffer structure that offers impact resistance and has a small contact area. An annularly distributed multi-sphere point contact structure was designed and fabricated on a magnesium alloy substrate based on the Hertz contact theory. The accuracy of the finite element numerical model, constructed using Abaqus/Explicit, was verified through hydraulic impact tests. The impact mechanical properties of the structure were studied by analyzing the influence of the number, diameter, and cavity radius of hemispheres using an experimentally verified finite element model. The axial and radial deformations of the structure were compared and analyzed. The research findings indicate that the deformation and impact resistance of the structure can be greatly influenced by increasing the number of hemispheres, enlarging the hemisphere diameter, and incorporating internal cavities. Specifically, with 6 hemispheres, each with a diameter of Φ 6 mm and a cavity radius of R1.5 mm, the axial and radial deformations are only 1.03 mm and 3.02 mm, respectively. The contact area of a single hemisphere is 7.16 mm<sup>2</sup>. The study offers new perspectives on choosing buffer structures in high-impact environments.https://www.mdpi.com/2073-4352/15/7/665multi-spherepoint contactsimpact mechanical propertiesdeformationmagnesium alloy |
| spellingShingle | Xiaoting Sun Guibo Yu Qiao Ma Yi Wang Wei Wang Impact Mechanical Properties of Magnesium Alloy Structures with Annularly Distributed Multi-Sphere Point Contacts Crystals multi-sphere point contacts impact mechanical properties deformation magnesium alloy |
| title | Impact Mechanical Properties of Magnesium Alloy Structures with Annularly Distributed Multi-Sphere Point Contacts |
| title_full | Impact Mechanical Properties of Magnesium Alloy Structures with Annularly Distributed Multi-Sphere Point Contacts |
| title_fullStr | Impact Mechanical Properties of Magnesium Alloy Structures with Annularly Distributed Multi-Sphere Point Contacts |
| title_full_unstemmed | Impact Mechanical Properties of Magnesium Alloy Structures with Annularly Distributed Multi-Sphere Point Contacts |
| title_short | Impact Mechanical Properties of Magnesium Alloy Structures with Annularly Distributed Multi-Sphere Point Contacts |
| title_sort | impact mechanical properties of magnesium alloy structures with annularly distributed multi sphere point contacts |
| topic | multi-sphere point contacts impact mechanical properties deformation magnesium alloy |
| url | https://www.mdpi.com/2073-4352/15/7/665 |
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