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| Analysis of the Effect of Humidity and Heat on Aging Performance of HTPB Propellant |
| Received:October 27, 2021 Revised:November 22, 2021 |
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| DOI：10.7643/issn.1672-9242.2022.02.008 |
| KeyWord:HTPB adhesive interface hygrothermal aging variance analysis |
| Author | Institution |
| ZHANG Xiao-jun |
Xi’an Modern Chemistry Research Institute, Xi¢an , China |
| XING Peng-tao |
Xi’an Modern Chemistry Research Institute, Xi¢an , China |
| ZHU Jia-jia |
Xi’an Modern Chemistry Research Institute, Xi¢an , China |
| SHU Hui-ming |
Xi’an Modern Chemistry Research Institute, Xi¢an , China |
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| Abstract: |
| This paper aims to grasp the influence and contribution of temperature and humidity on the mechanical properties of HTPB propellants during the aging process. Accelerated aging experiments were carried out on HTPB propellants under different moist heat conditions, and the weight loss percentage and mechanical properties of propellants with different aging times were measured. Combined with the action mechanism of the propellants under temperature and humidity, the change rule of weight loss percentage with aging time was analyzed. The double factor variance analysis for the hygrothermal aging process of HTPB propellant has been carried out by using the maximum tensile strength as the index. The results show that humidity plays a leading role in the influence of the weight loss percentage of HTPB propellants. There is an inflection point value of humidity (between 75% and 85%), greater than or less than this inflection point value, the propellant follows a different weight loss percentage change rules. The F value of temperature and humidity on the analysis of variance of the maximum tensile strength of the propellant is greater than its critical value, which has a significant effect. In comparison, the impact of humidity is more significant. The influence of temperature and humidity on the maximum tensile strength of propellant increases first and then decreases during aging. The effect of temperature-humidity interaction on the propellant was not significant in the early and late stages of the test, but it was more significant in the middle of the test, which also showed a law of first increasing and then decreasing. The contribution rate of humidity to the maximum tensile strength of propellant is the largest, followed by temperature, and the interaction is the least. From the time axis, the contribution rate of humidity shows a monotonically increasing trend, while that of temperature decreases monotonically, and the interaction shows a parabolic trend. |
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