Dynamic characteristics of enhanced Al/PTFE and real-time quantitative evaluation of impact release energy under vacuum environment
Aluminum/Polytetrafluoroethylene (Al/PTFE) reactive material occurs chemical reaction and release a large amount of energy under the impact load, which has the dual characteristics of strength and energy release, so it can be applied to the attack of confined space targets to enhance the damage effe...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-12-01
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| Series: | Results in Physics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379721010172 |
| _version_ | 1830183259370160128 |
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| author | Enling Tang Zhimin Sun Yafei Han Wenhao Yu Chuang Chen Mingyang Xu Mengzhou Chang Kai Guo Liping He |
| author_facet | Enling Tang Zhimin Sun Yafei Han Wenhao Yu Chuang Chen Mingyang Xu Mengzhou Chang Kai Guo Liping He |
| author_sort | Enling Tang |
| collection | DOAJ |
| description | Aluminum/Polytetrafluoroethylene (Al/PTFE) reactive material occurs chemical reaction and release a large amount of energy under the impact load, which has the dual characteristics of strength and energy release, so it can be applied to the attack of confined space targets to enhance the damage effect on the target. In order to study the dynamic strength of enhanced Al/PTFE and the real-time impact release energy, based on the traditional formula Al/PTFE (26.5%/73.5%), enhanced Al/PTFE reactive material specimens were prepared by cold pressing and rapid cooling processes, and the dynamic mechanical properties of the specimens were tested by the Split Hopkinson Pressure Bar (SHPB) testing system. The experiments have been conducted by using two-stage light gas gun loading system combining with the impact release energy related testing system under vacuum condition. Meanwhile, the evolutionary process of reaction product was numerically simulated by ANSYS/Fluent, and the boundary conditions of the numerical simulation were defined by self-programmed UDF subroutine. Experiments, theoretical analysis and numerical simulation were adopted to obtain the real time energy release of Al/PTFE reactive materials at different impact velocities. The results show that the maximum dynamic failure strength of the enhanced Al/PTFE reactive projectile is 126 MPa, and the strain rate hardening phenomenon and viscoelastic effect are exhibited when the strain rate is in the range of 1500 ∼ 3000 s−1. When the strain rate is in the range of 3000 ∼ 4000 s−1, the specimen is insensitive to strain rate. When the impact velocities are 2.30 km/s and 2.54 km/s, the energies that the reactive projectiles release are 8.36 kJ/g and 8.38 kJ/g, respectively, and the reactive material reacts completely. When the impact velocities are 1.64 km/s, 1.80 km/s and 1.94 km/s, the projectiles have not fully reacted. The reactive degree of the reactive projectile increases with the increase of the impact velocity. For the complete reaction of Al/PTFE reactive projectile, the critical impact velocity of the enhanced reactive material is between 1.94 km/s and 2.30 km/s. |
| first_indexed | 2024-12-17T21:12:00Z |
| format | Article |
| id | doaj.art-45a4f16737144a06a59c3aabb61b2df4 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-12-17T21:12:00Z |
| publishDate | 2021-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-45a4f16737144a06a59c3aabb61b2df42022-12-21T21:32:27ZengElsevierResults in Physics2211-37972021-12-0131105019Dynamic characteristics of enhanced Al/PTFE and real-time quantitative evaluation of impact release energy under vacuum environmentEnling Tang0Zhimin Sun1Yafei Han2Wenhao Yu3Chuang Chen4Mingyang Xu5Mengzhou Chang6Kai Guo7Liping He8Corresponding author.; Key Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang 110159, ChinaKey Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang 110159, ChinaKey Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang 110159, ChinaKey Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang 110159, ChinaKey Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang 110159, ChinaKey Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang 110159, ChinaKey Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang 110159, ChinaKey Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang 110159, ChinaKey Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang 110159, ChinaAluminum/Polytetrafluoroethylene (Al/PTFE) reactive material occurs chemical reaction and release a large amount of energy under the impact load, which has the dual characteristics of strength and energy release, so it can be applied to the attack of confined space targets to enhance the damage effect on the target. In order to study the dynamic strength of enhanced Al/PTFE and the real-time impact release energy, based on the traditional formula Al/PTFE (26.5%/73.5%), enhanced Al/PTFE reactive material specimens were prepared by cold pressing and rapid cooling processes, and the dynamic mechanical properties of the specimens were tested by the Split Hopkinson Pressure Bar (SHPB) testing system. The experiments have been conducted by using two-stage light gas gun loading system combining with the impact release energy related testing system under vacuum condition. Meanwhile, the evolutionary process of reaction product was numerically simulated by ANSYS/Fluent, and the boundary conditions of the numerical simulation were defined by self-programmed UDF subroutine. Experiments, theoretical analysis and numerical simulation were adopted to obtain the real time energy release of Al/PTFE reactive materials at different impact velocities. The results show that the maximum dynamic failure strength of the enhanced Al/PTFE reactive projectile is 126 MPa, and the strain rate hardening phenomenon and viscoelastic effect are exhibited when the strain rate is in the range of 1500 ∼ 3000 s−1. When the strain rate is in the range of 3000 ∼ 4000 s−1, the specimen is insensitive to strain rate. When the impact velocities are 2.30 km/s and 2.54 km/s, the energies that the reactive projectiles release are 8.36 kJ/g and 8.38 kJ/g, respectively, and the reactive material reacts completely. When the impact velocities are 1.64 km/s, 1.80 km/s and 1.94 km/s, the projectiles have not fully reacted. The reactive degree of the reactive projectile increases with the increase of the impact velocity. For the complete reaction of Al/PTFE reactive projectile, the critical impact velocity of the enhanced reactive material is between 1.94 km/s and 2.30 km/s.http://www.sciencedirect.com/science/article/pii/S2211379721010172Enhanced Al/PTFE reactive projectileHypervelocity impactDynamic characteristicReal-time reactive energy releaseQuantitative evaluation of energy release |
| spellingShingle | Enling Tang Zhimin Sun Yafei Han Wenhao Yu Chuang Chen Mingyang Xu Mengzhou Chang Kai Guo Liping He Dynamic characteristics of enhanced Al/PTFE and real-time quantitative evaluation of impact release energy under vacuum environment Results in Physics Enhanced Al/PTFE reactive projectile Hypervelocity impact Dynamic characteristic Real-time reactive energy release Quantitative evaluation of energy release |
| title | Dynamic characteristics of enhanced Al/PTFE and real-time quantitative evaluation of impact release energy under vacuum environment |
| title_full | Dynamic characteristics of enhanced Al/PTFE and real-time quantitative evaluation of impact release energy under vacuum environment |
| title_fullStr | Dynamic characteristics of enhanced Al/PTFE and real-time quantitative evaluation of impact release energy under vacuum environment |
| title_full_unstemmed | Dynamic characteristics of enhanced Al/PTFE and real-time quantitative evaluation of impact release energy under vacuum environment |
| title_short | Dynamic characteristics of enhanced Al/PTFE and real-time quantitative evaluation of impact release energy under vacuum environment |
| title_sort | dynamic characteristics of enhanced al ptfe and real time quantitative evaluation of impact release energy under vacuum environment |
| topic | Enhanced Al/PTFE reactive projectile Hypervelocity impact Dynamic characteristic Real-time reactive energy release Quantitative evaluation of energy release |
| url | http://www.sciencedirect.com/science/article/pii/S2211379721010172 |
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