Simulation of dwell-to-penetration transition for SiC ceramics subjected to impact of tungsten long rods
For a ceramic armour impacted by a long rod projectile, increasing the dwell-to-penetration transition velocity significantly improves its ballistic performance, whereas it can be achieved by prestressing of the ceramic or placing a buffer over the impact surface. In this paper, numerical simulation...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Conference Paper |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/136809 |
| _version_ | 1824455422580359168 |
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| author | Yuan, Jianming Tan, Geoffrey Eng Beng Goh, Wei Liang |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Yuan, Jianming Tan, Geoffrey Eng Beng Goh, Wei Liang |
| author_sort | Yuan, Jianming |
| collection | NTU |
| description | For a ceramic armour impacted by a long rod projectile, increasing the dwell-to-penetration transition velocity significantly improves its ballistic performance, whereas it can be achieved by prestressing of the ceramic or placing a buffer over the impact surface. In this paper, numerical simulation using the AUTODYN hydrocode is conducted to investigate how dwell-to-penetration transition is affected by the radial prestress and the presence of a buffer. Taking account of the pressure-dependent strength of SiC ceramics, it is found that distribution of hydrostatic pressure and equivalent stress in the ceramics controls damage initiation and dwell to-penetration transition. Ceramic damage initiates from the edge of the projectile and then forms a damaged zone in front of the projectile. Compared to the radial prestress, the buffer more effectively suppresses damage initiation to fulfil interface dwell at a higher transition velocity. |
| first_indexed | 2025-02-19T03:37:57Z |
| format | Conference Paper |
| id | ntu-10356/136809 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:37:57Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1368092023-07-08T05:41:07Z Simulation of dwell-to-penetration transition for SiC ceramics subjected to impact of tungsten long rods Yuan, Jianming Tan, Geoffrey Eng Beng Goh, Wei Liang School of Materials Science & Engineering 14th Armor Ceramics Symposium - 40th International Conference on Advanced Ceramics and Composites Temasek Laboratories Engineering::Materials Numerical Simulation Ceramics Surface For a ceramic armour impacted by a long rod projectile, increasing the dwell-to-penetration transition velocity significantly improves its ballistic performance, whereas it can be achieved by prestressing of the ceramic or placing a buffer over the impact surface. In this paper, numerical simulation using the AUTODYN hydrocode is conducted to investigate how dwell-to-penetration transition is affected by the radial prestress and the presence of a buffer. Taking account of the pressure-dependent strength of SiC ceramics, it is found that distribution of hydrostatic pressure and equivalent stress in the ceramics controls damage initiation and dwell to-penetration transition. Ceramic damage initiates from the edge of the projectile and then forms a damaged zone in front of the projectile. Compared to the radial prestress, the buffer more effectively suppresses damage initiation to fulfil interface dwell at a higher transition velocity. Accepted version 2020-01-30T01:08:26Z 2020-01-30T01:08:26Z 2017 Conference Paper Yuan, J., Tan, G. E. B., & Goh, W. L. (2017). Simulation of dwell-to-penetration transition for SiC ceramics subjected to impact of tungsten long rods. 14th Armor Ceramics Symposium - 40th International Conference on Advanced Ceramics and Composites. doi:10.1002/9781119321682.ch8 https://hdl.handle.net/10356/136809 10.1002/9781119321682.ch8 37 65 73 en © The American Ceramic Society 2017. This is the author's version of the work. It is posted here by permission of The American Ceramic Society for personal use, not for redistribution. The definitive version was published in the Journal of the American Ceramic Society, volume 37, issue 4, pages 65-73. https://doi.org/10.1002/9781119321682.ch8 10 p. application/pdf |
| spellingShingle | Engineering::Materials Numerical Simulation Ceramics Surface Yuan, Jianming Tan, Geoffrey Eng Beng Goh, Wei Liang Simulation of dwell-to-penetration transition for SiC ceramics subjected to impact of tungsten long rods |
| title | Simulation of dwell-to-penetration transition for SiC ceramics subjected to impact of tungsten long rods |
| title_full | Simulation of dwell-to-penetration transition for SiC ceramics subjected to impact of tungsten long rods |
| title_fullStr | Simulation of dwell-to-penetration transition for SiC ceramics subjected to impact of tungsten long rods |
| title_full_unstemmed | Simulation of dwell-to-penetration transition for SiC ceramics subjected to impact of tungsten long rods |
| title_short | Simulation of dwell-to-penetration transition for SiC ceramics subjected to impact of tungsten long rods |
| title_sort | simulation of dwell to penetration transition for sic ceramics subjected to impact of tungsten long rods |
| topic | Engineering::Materials Numerical Simulation Ceramics Surface |
| url | https://hdl.handle.net/10356/136809 |
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