The Pore Collapse “Hot-Spots” Model Coupled with Brittle Damage for Solid Explosives
This paper is devoted to the building of a numerical pore collapse model with “hot-spots” formation for the impacted damage explosives. According to damage mechanical evolution of brittle material, the one-dimensional elastic-viscoplastic collapse model was improved to incorporate the impact damage...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2014/972414 |
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| author | L. R. Cheng R. Chen H. J. Shi F. Y. Lu |
| author_facet | L. R. Cheng R. Chen H. J. Shi F. Y. Lu |
| author_sort | L. R. Cheng |
| collection | DOAJ |
| description | This paper is devoted to the building of a numerical pore collapse model with “hot-spots” formation for the impacted damage explosives. According to damage mechanical evolution of brittle material, the one-dimensional elastic-viscoplastic collapse model was improved to incorporate the impact damage during the dynamic collapse of pores. The damage of explosives was studied using the statistical crack mechanics (SCRAM). The effects of the heat conduction and the chemical reaction were taken into account in the formation of “hot-spots.” To verify the improved model, numerical simulations were carried out for different pressure states and used to model a multiple-impact experiment. The results show that repeated weak impacts can lead to the collapse of pores and the “hot-spots” may occur due to the accumulation of internal defects accompanied by the softening of explosives. |
| format | Article |
| id | doaj-art-06c02ff378534751b611dd6eafb3827a |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-06c02ff378534751b611dd6eafb3827a2025-08-20T02:02:50ZengWileyShock and Vibration1070-96221875-92032014-01-01201410.1155/2014/972414972414The Pore Collapse “Hot-Spots” Model Coupled with Brittle Damage for Solid ExplosivesL. R. Cheng0R. Chen1H. J. Shi2F. Y. Lu3Department of Engineering Mechanics, School of Aerospace, AML, Tsinghua University, Beijing 100084, ChinaCollege of Science, National University of Defense Technology, Changsha 410073, ChinaDepartment of Engineering Mechanics, School of Aerospace, AML, Tsinghua University, Beijing 100084, ChinaCollege of Science, National University of Defense Technology, Changsha 410073, ChinaThis paper is devoted to the building of a numerical pore collapse model with “hot-spots” formation for the impacted damage explosives. According to damage mechanical evolution of brittle material, the one-dimensional elastic-viscoplastic collapse model was improved to incorporate the impact damage during the dynamic collapse of pores. The damage of explosives was studied using the statistical crack mechanics (SCRAM). The effects of the heat conduction and the chemical reaction were taken into account in the formation of “hot-spots.” To verify the improved model, numerical simulations were carried out for different pressure states and used to model a multiple-impact experiment. The results show that repeated weak impacts can lead to the collapse of pores and the “hot-spots” may occur due to the accumulation of internal defects accompanied by the softening of explosives.http://dx.doi.org/10.1155/2014/972414 |
| spellingShingle | L. R. Cheng R. Chen H. J. Shi F. Y. Lu The Pore Collapse “Hot-Spots” Model Coupled with Brittle Damage for Solid Explosives Shock and Vibration |
| title | The Pore Collapse “Hot-Spots” Model Coupled with Brittle Damage for Solid Explosives |
| title_full | The Pore Collapse “Hot-Spots” Model Coupled with Brittle Damage for Solid Explosives |
| title_fullStr | The Pore Collapse “Hot-Spots” Model Coupled with Brittle Damage for Solid Explosives |
| title_full_unstemmed | The Pore Collapse “Hot-Spots” Model Coupled with Brittle Damage for Solid Explosives |
| title_short | The Pore Collapse “Hot-Spots” Model Coupled with Brittle Damage for Solid Explosives |
| title_sort | pore collapse hot spots model coupled with brittle damage for solid explosives |
| url | http://dx.doi.org/10.1155/2014/972414 |
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