固体火箭技术2024，Vol.47Issue(6)：834-839,6.DOI:10.7673/j.issn.1006-2793.2024.06.010
丁羟四组元推进剂老化过程中力学性能表征试验研究
Experimental study on mechanical properties characterization of four-component HTPB propellant during aging
李沐晨 1刘向阳 1陈颖俊 1张广龙 1陈春堃1
作者信息
- 1. 北京理工大学 宇航学院,北京 100081
- 折叠
摘要
Abstract
The structural integrity of solid propellant is very important for the storage life evaluation of solid rocket motor,and the mechanical properties of solid propellant during aging must be analyzed.The accelerated aging mechanism of four-component HT-PB propellants at 60℃was studied,and the maximum elongation,tensile strength,initial modulus and"dewetting"strain threshold at 20℃,60℃and-40℃,and surface hardness at 20℃were obtained.Furthermore,the relationship between characterization pa-rameters of mechanical properties at 20℃and surface hardness,as well as correlation of mechanical properties characterization pa-rameters at 60℃and-40℃with those at 20℃were investigated.The results show that:(1)RDX do not have a significant effect on the aging of the four-component HTPB propellant.(2)During the aging process,there exists a significant positive correlation be-tween the tensile strength of the propellant at 20℃and the surface hardness,as well as a significant positive correlation between the tensile strength at 60℃or-40℃and the tensile strength at 20℃.(3)During the aging process,there is no obvious correlation be-tween the"dewetting"strain threshold at 60℃or-40℃and the"dewetting"strain threshold at 20℃for the four-component HT-PB propellant.Taking the"dewetting"strain threshold as fixed values,the ratio of 60℃to 20℃is 1.93,while the ratio of-40℃to 20℃is 0.33.关键词
丁羟四组元推进剂/老化特性/高温加速老化/贮存寿命Key words
four-component HTPB propellant/aging characteristics/high temperature accelerates aging/storage life分类
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李沐晨,刘向阳,陈颖俊,张广龙,陈春堃..丁羟四组元推进剂老化过程中力学性能表征试验研究[J].固体火箭技术,2024,47(6):834-839,6.
