基于温度-压力双应力加速试验的NEPE推进剂寿命预估研究  

Research on Storage Life Prediction of NEPE Propellant Based on Temperature-Pressure Dual Stress Accelerating Test

作　　者：华栋 丁黎[1] 祝艳龙 安静[1] 常海[1] HUA Dong;DING Li;ZHU Yan-long;AN Jing;CHANG Hai(Xi'an Modern Chemistry Research Institute,Xi'an 710065,China)

机构地区：[1]西安近代化学研究所,西安710065

出　　处：《装备环境工程》2022年第2期51-58,共8页Equipment Environmental Engineering

摘　　要：目的探索实际贮存状态NEPE推进剂自重产生的诱发压力对其贮存寿命的影响,开展温度-压力双应力作用下NEPE推进剂的寿命预估研究。方法对比分析NEPE推进剂在加速老化试验过程中的失效机理,确定其老化失效模式以及老化失效参量,采用加速老化试验及力学性能测试,分析NEPE推进剂加速老化过程中力学性能的变化规律。基于不同温度-压力应力条件下NEPE推进剂老化特性的变化规律,构建温度-压力双应力作用的贮存寿命预估模型,对25℃和2 MPa下NEPE推进剂的寿命进行评估。结果温度、预紧压力升高均会促进NEPE推进剂力学性能的衰减。结论相比于单温度应力下的加速老化特性,温度-压力双应力作用会提高NEPE推进剂试片力学性能的衰减速度,考虑推进剂的自重影响因素,采用温度-压力双应力条件下的NEPE推进剂寿命预估模型,可以更准确地预测NEPE推进剂的贮存寿命。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.

关 键 词：NEPE推进剂 温度-应力双环境应力加速试验 加速模型 寿命预估 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程] TJ089[兵器科学与技术—兵器发射理论与技术]