A Mechanism of Hot-spots Formation at the Crack Tip of Al-PTFE under Quasi-static Compression
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Generally, the Al-PTFE (polytetrafluoroethylene) is thought to be inert under quasi-static or static loads. However, it was found that Al-PTFE would initiate under quasi-static compression after a specific heat treatment procedure and the open...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/66232 |
| _version_ | 1848761270988177408 |
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| author | Feng, B. Li, Y. Hao, Hong Wang, H. Hao, Yifei Fang, X. |
| author_facet | Feng, B. Li, Y. Hao, Hong Wang, H. Hao, Yifei Fang, X. |
| author_sort | Feng, B. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Generally, the Al-PTFE (polytetrafluoroethylene) is thought to be inert under quasi-static or static loads. However, it was found that Al-PTFE would initiate under quasi-static compression after a specific heat treatment procedure and the opening fracture plays a crucial role in the initiation. A unique micrographic fracture pattern which showed unstable crack propagation and a ductile-to-brittle transition was observed at openning cracks by SEM. Combining the observed microstructure with the stress distribution at the path of crack propagation derived from numerical simulation, a mechanism was proposed to explain the formation of “hot-spots” at the crack tip. The temperature rise at the crack tip was estimated to be at least 612 °C, which is high enough to ignite the Al-PTFE composite. |
| first_indexed | 2025-11-14T10:29:01Z |
| format | Journal Article |
| id | curtin-20.500.11937-66232 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:29:01Z |
| publishDate | 2017 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-662322018-07-09T04:27:59Z A Mechanism of Hot-spots Formation at the Crack Tip of Al-PTFE under Quasi-static Compression Feng, B. Li, Y. Hao, Hong Wang, H. Hao, Yifei Fang, X. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Generally, the Al-PTFE (polytetrafluoroethylene) is thought to be inert under quasi-static or static loads. However, it was found that Al-PTFE would initiate under quasi-static compression after a specific heat treatment procedure and the opening fracture plays a crucial role in the initiation. A unique micrographic fracture pattern which showed unstable crack propagation and a ductile-to-brittle transition was observed at openning cracks by SEM. Combining the observed microstructure with the stress distribution at the path of crack propagation derived from numerical simulation, a mechanism was proposed to explain the formation of “hot-spots” at the crack tip. The temperature rise at the crack tip was estimated to be at least 612 °C, which is high enough to ignite the Al-PTFE composite. 2017 Journal Article http://hdl.handle.net/20.500.11937/66232 10.1002/prep.201700106 restricted |
| spellingShingle | Feng, B. Li, Y. Hao, Hong Wang, H. Hao, Yifei Fang, X. A Mechanism of Hot-spots Formation at the Crack Tip of Al-PTFE under Quasi-static Compression |
| title | A Mechanism of Hot-spots Formation at the Crack Tip of Al-PTFE under Quasi-static Compression |
| title_full | A Mechanism of Hot-spots Formation at the Crack Tip of Al-PTFE under Quasi-static Compression |
| title_fullStr | A Mechanism of Hot-spots Formation at the Crack Tip of Al-PTFE under Quasi-static Compression |
| title_full_unstemmed | A Mechanism of Hot-spots Formation at the Crack Tip of Al-PTFE under Quasi-static Compression |
| title_short | A Mechanism of Hot-spots Formation at the Crack Tip of Al-PTFE under Quasi-static Compression |
| title_sort | mechanism of hot-spots formation at the crack tip of al-ptfe under quasi-static compression |
| url | http://hdl.handle.net/20.500.11937/66232 |