NEPE推进剂动态力学特性分析

推进技术 ›› 2015, Vol. 36 ›› Issue (9): 1410-1415.

NEPE推进剂动态力学特性分析

高艳宾,陈雄,许进升,胡少青

南京理工大学机械工程学院，江苏南京 210094,南京理工大学机械工程学院，江苏南京 210094,南京理工大学机械工程学院，江苏南京 210094,南京理工大学机械工程学院，江苏南京 210094

发布日期:2021-08-15
作者简介:高艳宾(1989—)，男，硕士生，研究领域为固体火箭发动机推进剂力学性能。
基金资助:
总装备部重点预先研究项目(20101019)。

Dynamic Mechanical Properties Analysis?of NEPE Propellant

School of Mechanical Engineering，Nanjing University of Science and Technology，Nanjing 210094，China,School of Mechanical Engineering，Nanjing University of Science and Technology，Nanjing 210094，China,School of Mechanical Engineering，Nanjing University of Science and Technology，Nanjing 210094，China and School of Mechanical Engineering，Nanjing University of Science and Technology，Nanjing 210094，China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究NEPE推进剂在不同温度和频率激励作用下的动态力学性能，利用DMA-ELF3200动态热机械分析仪测定了材料动态力学参数。通过试验，获得了推进剂的储能模量、损耗模量及损耗因子温度谱。由分子运动理论得到了玻璃化转活化能。基于时间-温度等效原理对NEPE推进剂动态粘弹性参数进行等效叠加，得到了移位因子随试验温度变化的规律。结果表明:损耗模量的温度谱曲线在低温段只存在一个峰值(玻璃化转变峰)，玻璃化转变温度对频率有依赖性，在1Hz加载频率下转变温度为-62℃；玻璃化转变所需要的活化能为163.8kJ·mol-1；移位因子和温度之间的关系遵循Williams-Landel-Ferry (WLF)方程，随试验温度升高，移位因子下降。

关键词: NEPE推进剂；动态力学分析；玻璃化转变温度；时间-温度等效原理

Abstract: In order to determine dynamic mechanical behavior of NEPE propellant under different excitation frequencies and temperature，the dynamic mechanical analyzer (DMA-ELF3200) was employed to measure dynamic viscoelastic parameters. Temperature spectrums of storage modules，loss modules and loss tangent were obtained through?experiment. The glass-transition activation energy was obtained based on the kinetic molecular theory. The dynamic?viscoelastic parameters were superimposed from the time-temperature equivalence principle. The?change?patterns of the shift factors?with?temperature were found?out. The results show that only one single relaxation peak exists in loss modulus-temperature curves in the low temperature region，which is glass transition relaxation peak. Glass transition temperature is dependent on the loading frequencies. The?glass?transition?temperature is -62℃ in frequency 1 Hz. The activation energy is about 163.8kJ·mol-1.The relationship between shift factors? and temperature follows Williams-Landel-Ferry (WLF) equation. The?shift factor?drops as the?temperature?rises.

Key words: NEPE propellant；Dynamic mechanical analysis；Glass transition temperature；Time-temperature equivalence

高艳宾,陈雄,许进升,胡少青. NEPE推进剂动态力学特性分析[J]. 推进技术, 2015, 36(9): 1410-1415.

GAO Yan-bin,CHEN Xiong,XU Jin-sheng,HU Shao-qing. Dynamic Mechanical Properties Analysis?of NEPE Propellant[J]. Journal of Propulsion Technology, 2015, 36(9): 1410-1415.

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