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| Research on Storage Life Prediction of NEPE Propellant Based on Temperature-Pressure Dual Stress Accelerating Test |
| Received:January 26, 2022 Revised:February 06, 2022 |
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| DOI：10.7643/issn.1672-9242.2022.02.009 |
| KeyWord:NEPE propellant temperature-stress dual stress accelerating test accelerating model life prediction |
| Author | Institution |
| HUA Dong |
Xi'an Modern Chemistry Research Institute, Xi'an , China |
| DING Li |
Xi'an Modern Chemistry Research Institute, Xi'an , China |
| ZHU Yan-long |
Xi'an Modern Chemistry Research Institute, Xi'an , China |
| AN Jing |
Xi'an Modern Chemistry Research Institute, Xi'an , China |
| CHANG Hai |
Xi'an Modern Chemistry Research Institute, Xi'an , China |
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| Abstract: |
| In order to explore the influence of the induced pressure loaded by the self-weight of NEPE propellant on its storage life, a study on life prediction of NEPE propellant under different temperature-pressure conditions was carried out. By analyzing the failure mechanism of NEPE propellant in accelerated aging test, its storage failure mode and parameters were determined. The accelerated aging test and mechanical property test were used to analyze the mechanical properties of NEPE propellant during accelerated aging. Based on changing of aging characteristics of NEPE propellant under different temperature-pressure conditions, a storage life prediction model under effect of temperature-pressure dual stress was constructed. The storage life of NEPE propellant was evaluated under 25 ℃ and load pressure of 2 MPa. The results show that, increas of temperature and preload pressure can promote the attenuation of the mechanical properties of NEPE propellant. Compared with accelerating aging characteristics under single temperature stress, the mechanical properties of NEPE propellant specimens decay faster under dual stress of temperature and pressure. Taking the influence of propellant's self-weight into account, storage life prediction model under dual stress of temperature and pressure can be used to predict the storage life of NEPE propellant more accurately. |
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