基于动态平移因子的固体推进剂抗拉强度主曲线测试方法  

Testing method for tensile strength master curve of solid propellant based on dynamic shift factors

作　　者：周源 池旭辉[2] 赖建伟 杨根[2] 常华[2] ZHOU Yuan;CHI Xuhui;LAI Jianwei;YANG Gen;CHANG Hua(College of Weaponry Engineering,Naval Univ.of Engineering,Wuhan 430033,China;Science and Technology on Aerospace Chemical Power Laboratory,Hubei Institute of Aerospace Chemotechnology,Xiangyang 441003,China)

机构地区：[1]海军工程大学兵器工程学院,武汉430033 [2]航天化学动力技术重点实验室,湖北航天化学技术研究所,湖北襄阳441003

出　　处：《海军工程大学学报》2023年第6期1-5,39,共6页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(62101579)。

摘　　要：固体推进剂抗拉强度主曲线是固体火箭发动机设计以及药柱结构完整性分析的重要依据。为此,提出了一种采用非破坏性的动态力学分析(dynamic mechanical analysis,DMA)测试与静态力学试验相结合得到抗拉强度主曲线的新方法。该方法基于动态力学性能主曲线平移因子与静态力学性能主曲线平移因子的一致性,采用非破坏性的动态平移因子确定平移因子,以少量的静态力学测试得到不同温度、拉伸速率下的抗拉强度数据,并按照确定的平移因子进行平移,得到抗拉强度主曲线。研究结果表明:由动态平移因子生成的抗拉强度主曲线与传统方法所得主曲线一致性很好,试验所耗费时间仅为传统方法的22%,材料耗费仅为传统方法的35%。Tensile strength master curve is critical data for the structure integrity analysis and design of solid rocket motor grain.A novel method was proposed based on the uniformity between the shift factors obtained from dynamic mechanical tests and from static mechanical tests。The new method adopted nondestructive dynamic mechanical tests to establish the relation between shift factors and test temperatures,and adopted static mechanical tests to obtain tensile strength data at different temperature and tensile rate.Then a tensile strength master curve was created by translating the tensile strength data according the relation between shift factors and temperatures.Experimental results show that the tensile strength master curves agree well with that by traditional method,while it requires only 22%of the test time and expends 35%of test materials of the traditional method.

关 键 词：高分子物理 主曲线 动态力学性能 静态力学性能 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]