Force chains based mesoscale simulation on the dynamic response of Al-PTFE granular composites
Force chains based mesoscale simulation is conducted to investigate the response behavior of aluminum-polytetrafluoroethylene (Al-PTFE) granular composites under a low-velocity impact. A two-dimensional model followed the randomly normal distribution of real Al particles size is developed. The dynam...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2021-02-01
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| Series: | Defence Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214914719311183 |
| _version_ | 1818430210842820608 |
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| author | Le Tang Chao Ge Huan-guo Guo Qing-bo Yu Hai-fu Wang |
| author_facet | Le Tang Chao Ge Huan-guo Guo Qing-bo Yu Hai-fu Wang |
| author_sort | Le Tang |
| collection | DOAJ |
| description | Force chains based mesoscale simulation is conducted to investigate the response behavior of aluminum-polytetrafluoroethylene (Al-PTFE) granular composites under a low-velocity impact. A two-dimensional model followed the randomly normal distribution of real Al particles size is developed. The dynamic compressive process of Al-PTFE composites with varied Al mass fraction is simulated and validated against the experiments. The results indicate that, force chains behavior governed by the number and the size of agglomerated Al particles, significantly affects the impact response of the material. The failure mode of the material evolves from shear failure of matrix to debonding failure of particles with increasing density. A high crack area of the material is critical mechanism to arouse the initiation reaction. The damage maintained by force chains during large plastic strain builds up more local stresses concentration to enhance a possible reaction performance. In addition, simulation is performed with identical mass fraction but various Al size distribution to explore the effects of size centralization and dispersion on the mechanical properties of materials. It is found that smaller sized Al particle of composites are more preferred than its bulky material in ultimate strength. Increasing dispersed degree is facilitated to create stable force chains in samples with comparable particle number. The simulation studies provide further insights into the plastic deformation, failure mechanism, and possible energy release capacity for Al-PTFE composites, which is helpful for further design and application of reactive materials. |
| first_indexed | 2024-12-14T15:29:48Z |
| format | Article |
| id | doaj.art-3629c11c34fe406eba9c2f5761c69c0f |
| institution | Directory Open Access Journal |
| issn | 2214-9147 |
| language | English |
| last_indexed | 2024-12-14T15:29:48Z |
| publishDate | 2021-02-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj.art-3629c11c34fe406eba9c2f5761c69c0f2022-12-21T22:55:55ZengKeAi Communications Co., Ltd.Defence Technology2214-91472021-02-011715663Force chains based mesoscale simulation on the dynamic response of Al-PTFE granular compositesLe Tang0Chao Ge1Huan-guo Guo2Qing-bo Yu3Hai-fu Wang4Beijing Institute of Technology, ChinaBeijing Institute of Technology, ChinaBeijing Institute of Technology, ChinaBeijing Institute of Technology, ChinaCorresponding author.; Beijing Institute of Technology, ChinaForce chains based mesoscale simulation is conducted to investigate the response behavior of aluminum-polytetrafluoroethylene (Al-PTFE) granular composites under a low-velocity impact. A two-dimensional model followed the randomly normal distribution of real Al particles size is developed. The dynamic compressive process of Al-PTFE composites with varied Al mass fraction is simulated and validated against the experiments. The results indicate that, force chains behavior governed by the number and the size of agglomerated Al particles, significantly affects the impact response of the material. The failure mode of the material evolves from shear failure of matrix to debonding failure of particles with increasing density. A high crack area of the material is critical mechanism to arouse the initiation reaction. The damage maintained by force chains during large plastic strain builds up more local stresses concentration to enhance a possible reaction performance. In addition, simulation is performed with identical mass fraction but various Al size distribution to explore the effects of size centralization and dispersion on the mechanical properties of materials. It is found that smaller sized Al particle of composites are more preferred than its bulky material in ultimate strength. Increasing dispersed degree is facilitated to create stable force chains in samples with comparable particle number. The simulation studies provide further insights into the plastic deformation, failure mechanism, and possible energy release capacity for Al-PTFE composites, which is helpful for further design and application of reactive materials.http://www.sciencedirect.com/science/article/pii/S2214914719311183Al-PTFEGranular compositesMesoscale simulationDynamic responseForce chains |
| spellingShingle | Le Tang Chao Ge Huan-guo Guo Qing-bo Yu Hai-fu Wang Force chains based mesoscale simulation on the dynamic response of Al-PTFE granular composites Defence Technology Al-PTFE Granular composites Mesoscale simulation Dynamic response Force chains |
| title | Force chains based mesoscale simulation on the dynamic response of Al-PTFE granular composites |
| title_full | Force chains based mesoscale simulation on the dynamic response of Al-PTFE granular composites |
| title_fullStr | Force chains based mesoscale simulation on the dynamic response of Al-PTFE granular composites |
| title_full_unstemmed | Force chains based mesoscale simulation on the dynamic response of Al-PTFE granular composites |
| title_short | Force chains based mesoscale simulation on the dynamic response of Al-PTFE granular composites |
| title_sort | force chains based mesoscale simulation on the dynamic response of al ptfe granular composites |
| topic | Al-PTFE Granular composites Mesoscale simulation Dynamic response Force chains |
| url | http://www.sciencedirect.com/science/article/pii/S2214914719311183 |
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