含能材料2017，Vol.25Issue(5)：354-359,6.DOI:10.11943/j.issn.1006-9941.2017.05.001
低温下叠氮聚醚推进剂冲击损伤特性与动态力学性能
Impact Damage and Dynamic Mechanical Behaviors of Azido Polyether Propellant at Low Temperature
摘要
Abstract
The impact load was applied to azido polyether propellant by the instrumented drop hammer device at-40 ℃.The impact damage of the sample was characterized by X-ray micro-tomography (X-μCT),and the dynamic mechanical properties of the propellant sample were studied by dynamic mechanical analyzer at different loading frequencies.Results show that the dynamic mechanical properties of azido polyether propellant exhibit obviously loading frequency-dependent and the glass transition temperature increases from-38.1 ℃ to-23.1 ℃ when the loading frequency varies from 1 Hz to 20 Hz.The propellant samples have no macroscopic crack with the impact energy below 2 J, but part of the perchlorate amine(AP) particles inside have been broken;and the propellant samples break with the impact energy increasing.The test curves of broken samples contain unstable crack growth which indicates the partial brittle material character of azido polyether propellant.The whole process of the fracture of azido polyether propellant is that the initial micro cracks was formed in the AP particles with defects, extend to large macroscopic cracks in the basal body, and then the propellant samples broke.关键词
叠氮聚醚推进剂/冲击损伤/X射线微层析成像技术(X-μCT)/玻璃化转变温度(Tg)Key words
azido polyether propellant/impact damage/X-ray micro-tomography (X-μCT)/glass transition temperature(Tg)分类
军事科技引用本文复制引用
郑启龙,刘海涛,胡义文,菅晓霞,肖乐勤,周伟良..低温下叠氮聚醚推进剂冲击损伤特性与动态力学性能[J].含能材料,2017,25(5):354-359,6.基金项目
国家973重点基础研究规划项目资助(613275) （613275）
