Preliminary investigations on dynamic fracture of ductile metals by using electromagnetically driven expanding ring
Experiments referring to dynamic fracture of ductile metals, which is strongly dependent on the loading path, have been performed on the platform of an electromagnetically driven expanding ring. The time of the onset of fracture and the time at which the first complete fracture surface is formed wer...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2020-10-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0016527 |
| _version_ | 1819207777373913088 |
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| author | Jiakun Dan Zhaoliang Guo Yan Chen Yinglei Li Zhentao Zhang Bing Wei Mingtao Liu Yongtao Chen Tiegang Tang |
| author_facet | Jiakun Dan Zhaoliang Guo Yan Chen Yinglei Li Zhentao Zhang Bing Wei Mingtao Liu Yongtao Chen Tiegang Tang |
| author_sort | Jiakun Dan |
| collection | DOAJ |
| description | Experiments referring to dynamic fracture of ductile metals, which is strongly dependent on the loading path, have been performed on the platform of an electromagnetically driven expanding ring. The time of the onset of fracture and the time at which the first complete fracture surface is formed were accurately measured by incorporating a B dot probe. The resistive voltage and current of the ring were measured in the experiment as a function of time, and the ratio between them subsequently yields time dependence of the ring resistance, which manifests itself as a quantity extraordinarily sensitive to localized nucleation and growth of fracture and can be used to verify the related theoretical model of dynamic fracture. The temperature of the specimen was determined by Joule heating and plastic work under an assumption of adiabatic process. Hence, the time of initiation of fracture and the loading path including stress, strain, strain rate, and temperature were determined at the same time. The correlation between the initiation of fracture and the loading path can be used to establish a fracture model. A binary model of fracture was proposed to depict the thermodynamic character of fracture, and a phenomenological fracture criterion was established based on experimental observations. The binary model implies that the fraction of fractured atoms obeys a Fermi–Dirac-like distribution. The key point of the proposed fracture criterion lies in that fracture grows when the departure velocity of neighboring instable points due to expansion of the ring is larger than the velocity of energy transport. |
| first_indexed | 2024-12-23T05:28:53Z |
| format | Article |
| id | doaj.art-1dde2a82cc6d48199174c2215b3d55bc |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-23T05:28:53Z |
| publishDate | 2020-10-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-1dde2a82cc6d48199174c2215b3d55bc2022-12-21T17:58:31ZengAIP Publishing LLCAIP Advances2158-32262020-10-011010105001105001-1010.1063/5.0016527Preliminary investigations on dynamic fracture of ductile metals by using electromagnetically driven expanding ringJiakun Dan0Zhaoliang Guo1Yan Chen2Yinglei Li3Zhentao Zhang4Bing Wei5Mingtao Liu6Yongtao Chen7Tiegang Tang8Institute of Fluid Physics, China Academy of Engineering Physics, P.O.Box 919-101, Mianyang, Sichuan 621999, People’s Republic of ChinaInstitute of Fluid Physics, China Academy of Engineering Physics, P.O.Box 919-101, Mianyang, Sichuan 621999, People’s Republic of ChinaInstitute of Fluid Physics, China Academy of Engineering Physics, P.O.Box 919-101, Mianyang, Sichuan 621999, People’s Republic of ChinaInstitute of Fluid Physics, China Academy of Engineering Physics, P.O.Box 919-101, Mianyang, Sichuan 621999, People’s Republic of ChinaInstitute of Fluid Physics, China Academy of Engineering Physics, P.O.Box 919-101, Mianyang, Sichuan 621999, People’s Republic of ChinaInstitute of Fluid Physics, China Academy of Engineering Physics, P.O.Box 919-101, Mianyang, Sichuan 621999, People’s Republic of ChinaInstitute of Fluid Physics, China Academy of Engineering Physics, P.O.Box 919-101, Mianyang, Sichuan 621999, People’s Republic of ChinaInstitute of Fluid Physics, China Academy of Engineering Physics, P.O.Box 919-101, Mianyang, Sichuan 621999, People’s Republic of ChinaInstitute of Fluid Physics, China Academy of Engineering Physics, P.O.Box 919-101, Mianyang, Sichuan 621999, People’s Republic of ChinaExperiments referring to dynamic fracture of ductile metals, which is strongly dependent on the loading path, have been performed on the platform of an electromagnetically driven expanding ring. The time of the onset of fracture and the time at which the first complete fracture surface is formed were accurately measured by incorporating a B dot probe. The resistive voltage and current of the ring were measured in the experiment as a function of time, and the ratio between them subsequently yields time dependence of the ring resistance, which manifests itself as a quantity extraordinarily sensitive to localized nucleation and growth of fracture and can be used to verify the related theoretical model of dynamic fracture. The temperature of the specimen was determined by Joule heating and plastic work under an assumption of adiabatic process. Hence, the time of initiation of fracture and the loading path including stress, strain, strain rate, and temperature were determined at the same time. The correlation between the initiation of fracture and the loading path can be used to establish a fracture model. A binary model of fracture was proposed to depict the thermodynamic character of fracture, and a phenomenological fracture criterion was established based on experimental observations. The binary model implies that the fraction of fractured atoms obeys a Fermi–Dirac-like distribution. The key point of the proposed fracture criterion lies in that fracture grows when the departure velocity of neighboring instable points due to expansion of the ring is larger than the velocity of energy transport.http://dx.doi.org/10.1063/5.0016527 |
| spellingShingle | Jiakun Dan Zhaoliang Guo Yan Chen Yinglei Li Zhentao Zhang Bing Wei Mingtao Liu Yongtao Chen Tiegang Tang Preliminary investigations on dynamic fracture of ductile metals by using electromagnetically driven expanding ring AIP Advances |
| title | Preliminary investigations on dynamic fracture of ductile metals by using electromagnetically driven expanding ring |
| title_full | Preliminary investigations on dynamic fracture of ductile metals by using electromagnetically driven expanding ring |
| title_fullStr | Preliminary investigations on dynamic fracture of ductile metals by using electromagnetically driven expanding ring |
| title_full_unstemmed | Preliminary investigations on dynamic fracture of ductile metals by using electromagnetically driven expanding ring |
| title_short | Preliminary investigations on dynamic fracture of ductile metals by using electromagnetically driven expanding ring |
| title_sort | preliminary investigations on dynamic fracture of ductile metals by using electromagnetically driven expanding ring |
| url | http://dx.doi.org/10.1063/5.0016527 |
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