Mechanisms of Shock Dissipation in Semicrystalline Polyethylene
Semicrystalline polymers are lightweight, multiphase materials that exhibit attractive shock dissipation characteristics and have potential applications as protective armor for people and equipment. For shocks of 10 GPa or less, we analyzed various mechanisms for the storage and dissipation of shock...
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| 格式: | 文件 |
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Multidisciplinary Digital Publishing Institute
2023
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| 在线阅读: | https://hdl.handle.net/1721.1/152939 |
| _version_ | 1826189385096232960 |
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| author | Mikhail, John P. Rutledge, Gregory C. |
| author2 | Massachusetts Institute of Technology. Department of Chemical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Chemical Engineering Mikhail, John P. Rutledge, Gregory C. |
| author_sort | Mikhail, John P. |
| collection | MIT |
| description | Semicrystalline polymers are lightweight, multiphase materials that exhibit attractive shock dissipation characteristics and have potential applications as protective armor for people and equipment. For shocks of 10 GPa or less, we analyzed various mechanisms for the storage and dissipation of shock wave energy in a realistic, united atom (UA) model of semicrystalline polyethylene. Systems characterized by different levels of crystallinity were simulated using equilibrium molecular dynamics with a Hugoniostat to ensure that the resulting states conform to the Rankine–Hugoniot conditions. To determine the role of structural rearrangements, order parameters and configuration time series were collected during the course of the shock simulations. We conclude that the major mechanisms responsible for the storage and dissipation of shock energy in semicrystalline polyethylene are those associated with plastic deformation and melting of the crystalline domain. For this UA model, plastic deformation occurs primarily through fine crystallographic slip and the formation of kink bands, whose long period decreases with increasing shock pressure. |
| first_indexed | 2024-09-23T08:13:53Z |
| format | Article |
| id | mit-1721.1/152939 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T08:13:53Z |
| publishDate | 2023 |
| publisher | Multidisciplinary Digital Publishing Institute |
| record_format | dspace |
| spelling | mit-1721.1/1529392024-01-24T19:51:25Z Mechanisms of Shock Dissipation in Semicrystalline Polyethylene Mikhail, John P. Rutledge, Gregory C. Massachusetts Institute of Technology. Department of Chemical Engineering Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies Semicrystalline polymers are lightweight, multiphase materials that exhibit attractive shock dissipation characteristics and have potential applications as protective armor for people and equipment. For shocks of 10 GPa or less, we analyzed various mechanisms for the storage and dissipation of shock wave energy in a realistic, united atom (UA) model of semicrystalline polyethylene. Systems characterized by different levels of crystallinity were simulated using equilibrium molecular dynamics with a Hugoniostat to ensure that the resulting states conform to the Rankine–Hugoniot conditions. To determine the role of structural rearrangements, order parameters and configuration time series were collected during the course of the shock simulations. We conclude that the major mechanisms responsible for the storage and dissipation of shock energy in semicrystalline polyethylene are those associated with plastic deformation and melting of the crystalline domain. For this UA model, plastic deformation occurs primarily through fine crystallographic slip and the formation of kink bands, whose long period decreases with increasing shock pressure. 2023-11-13T16:58:51Z 2023-11-13T16:58:51Z 2023-10-30 2023-11-10T14:57:56Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/152939 Polymers 15 (21): 4262 (2023) PUBLISHER_CC http://dx.doi.org/10.3390/polym15214262 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ application/pdf Multidisciplinary Digital Publishing Institute Multidisciplinary Digital Publishing Institute |
| spellingShingle | Mikhail, John P. Rutledge, Gregory C. Mechanisms of Shock Dissipation in Semicrystalline Polyethylene |
| title | Mechanisms of Shock Dissipation in Semicrystalline Polyethylene |
| title_full | Mechanisms of Shock Dissipation in Semicrystalline Polyethylene |
| title_fullStr | Mechanisms of Shock Dissipation in Semicrystalline Polyethylene |
| title_full_unstemmed | Mechanisms of Shock Dissipation in Semicrystalline Polyethylene |
| title_short | Mechanisms of Shock Dissipation in Semicrystalline Polyethylene |
| title_sort | mechanisms of shock dissipation in semicrystalline polyethylene |
| url | https://hdl.handle.net/1721.1/152939 |
| work_keys_str_mv | AT mikhailjohnp mechanismsofshockdissipationinsemicrystallinepolyethylene AT rutledgegregoryc mechanismsofshockdissipationinsemicrystallinepolyethylene |