Cross-linking density and aging constitutive model of HTPB coating under prestrain thermal accelerated aging
In order to study the cross-linking density and aging constitutive relationship of HTPB coating during storage, the thermal accelerated aging tests at 0%, 3%, 6% and 9% prestrains were carried out. The cross-linking density of HTPB coating at different aging stages were tested using low-field 1H NMR...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2020-04-01
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| Series: | Defence Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214914719304805 |
| _version_ | 1819121495896489984 |
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| author | Yong-qiang Du Jian Zheng Chao Xiong |
| author_facet | Yong-qiang Du Jian Zheng Chao Xiong |
| author_sort | Yong-qiang Du |
| collection | DOAJ |
| description | In order to study the cross-linking density and aging constitutive relationship of HTPB coating during storage, the thermal accelerated aging tests at 0%, 3%, 6% and 9% prestrains were carried out. The cross-linking density of HTPB coating at different aging stages were tested using low-field 1H NMR and the variation of cross-linking density was analyzed. The aging model of cross-linking density considering the chemical aging and the physical stretching factors was established. The uniaxial tensile tests were carried out on HTPB coating at different aging stages and the cross-linking density was introduced into Ogden hyperelastic constitutive model as a characterization parameter of correction coefficient. Combined with uniaxial tensile test results, a prestrain aging constitutive model of HTPB coating was established. The results show that the cross-linking density of HTPB coating increases rapidly at first and then slowly with the increase of thermal accelerated aging time without prestrain. Under prestrain conditions, the cross-linking density of HTPB coating decreases at the early stage, and increases rapidly at first and then slowly at the middle and late stages of thermal accelerated aging. The correlation coefficients of aging model of cross-linking density and aging constitutive model with test results are R > 0.9500 and R > 0.9900 respectively, which can be used to accurately describe the cross-linking density and aging constitutive relationship of HTPB coating under prestrain accelerated thermal aging conditions. |
| first_indexed | 2024-12-22T06:37:29Z |
| format | Article |
| id | doaj.art-2cd24baaebce4c14a239e83409da7a6e |
| institution | Directory Open Access Journal |
| issn | 2214-9147 |
| language | English |
| last_indexed | 2024-12-22T06:37:29Z |
| publishDate | 2020-04-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj.art-2cd24baaebce4c14a239e83409da7a6e2022-12-21T18:35:32ZengKeAi Communications Co., Ltd.Defence Technology2214-91472020-04-01162439446Cross-linking density and aging constitutive model of HTPB coating under prestrain thermal accelerated agingYong-qiang Du0Jian Zheng1Chao Xiong2Shijiazhuang Campus, Army Engineering University, Shijiazhuang 050003, ChinaCorresponding author.; Shijiazhuang Campus, Army Engineering University, Shijiazhuang 050003, ChinaShijiazhuang Campus, Army Engineering University, Shijiazhuang 050003, ChinaIn order to study the cross-linking density and aging constitutive relationship of HTPB coating during storage, the thermal accelerated aging tests at 0%, 3%, 6% and 9% prestrains were carried out. The cross-linking density of HTPB coating at different aging stages were tested using low-field 1H NMR and the variation of cross-linking density was analyzed. The aging model of cross-linking density considering the chemical aging and the physical stretching factors was established. The uniaxial tensile tests were carried out on HTPB coating at different aging stages and the cross-linking density was introduced into Ogden hyperelastic constitutive model as a characterization parameter of correction coefficient. Combined with uniaxial tensile test results, a prestrain aging constitutive model of HTPB coating was established. The results show that the cross-linking density of HTPB coating increases rapidly at first and then slowly with the increase of thermal accelerated aging time without prestrain. Under prestrain conditions, the cross-linking density of HTPB coating decreases at the early stage, and increases rapidly at first and then slowly at the middle and late stages of thermal accelerated aging. The correlation coefficients of aging model of cross-linking density and aging constitutive model with test results are R > 0.9500 and R > 0.9900 respectively, which can be used to accurately describe the cross-linking density and aging constitutive relationship of HTPB coating under prestrain accelerated thermal aging conditions.http://www.sciencedirect.com/science/article/pii/S2214914719304805Prestrain thermal accelerated agingLow-field 1H NMRCross-linking densityAging constitutive model |
| spellingShingle | Yong-qiang Du Jian Zheng Chao Xiong Cross-linking density and aging constitutive model of HTPB coating under prestrain thermal accelerated aging Defence Technology Prestrain thermal accelerated aging Low-field 1H NMR Cross-linking density Aging constitutive model |
| title | Cross-linking density and aging constitutive model of HTPB coating under prestrain thermal accelerated aging |
| title_full | Cross-linking density and aging constitutive model of HTPB coating under prestrain thermal accelerated aging |
| title_fullStr | Cross-linking density and aging constitutive model of HTPB coating under prestrain thermal accelerated aging |
| title_full_unstemmed | Cross-linking density and aging constitutive model of HTPB coating under prestrain thermal accelerated aging |
| title_short | Cross-linking density and aging constitutive model of HTPB coating under prestrain thermal accelerated aging |
| title_sort | cross linking density and aging constitutive model of htpb coating under prestrain thermal accelerated aging |
| topic | Prestrain thermal accelerated aging Low-field 1H NMR Cross-linking density Aging constitutive model |
| url | http://www.sciencedirect.com/science/article/pii/S2214914719304805 |
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