温度载荷下的药柱累积损伤分析

推进技术 ›› 2013, Vol. 34 ›› Issue (2): 280-284.

温度载荷下的药柱累积损伤分析

邓斌¹,杨东², 段静波¹,申志彬¹

国防科技大学航天科学与工程学院, 湖南长沙 410073;陕西非金属材料工艺研究所,陕西西安 710025;国防科技大学航天科学与工程学院, 湖南长沙 410073;国防科技大学航天科学与工程学院, 湖南长沙 410073

发布日期:2021-08-15
作者简介:邓斌(1984—),男,博士生,研究方向为固体发动机结构完整性。E-mail:dbhj0@sina.cn
基金资助:
“十二五”武器装备预研项目;湖南省研究生科研创新项目(CX2010B001)。

Cumulative Damage Analysis of Solid Rocket Motor Grain under Temperature Loading

College of Aerospace Science and Engineering,National University of Defence Technology, Changsha 410073, China;Shaanxi Institute of Non-metallic Materials and Technology, Xi′an 710025, China;College of Aerospace Science and Engineering,National University of Defence Technology, Changsha 410073, China;College of Aerospace Science and Engineering,National University of Defence Technology, Changsha 410073, China

Published:2021-08-15

摘要/Abstract

摘要： 为研究温度载荷下的药柱累积损伤规律,应用线性累积损伤理论,建立了固体推进剂热粘弹性累积损伤模型,并根据不同应力水平下的蠕变破坏试验数据,获得了累积损伤的表达式；对药柱进行了热粘弹性有限元计算,得到了药柱危险部位的最大Von Mises应力随温度的变化规律,并讨论了不同贮存温度对药柱累积损伤的影响,最后针对典型海区的不同贮存温度进行了药柱的累积损伤算例分析。结果表明,温度是影响药柱损伤的重要因素,在热应力较大时药柱损伤并不总是较大；温度、应力大小以及作用时间共同决定着药柱的累积损伤。

关键词: 温度载荷; 热粘弹性; 时温等效因子; 累积损伤

Abstract: To obtain rule of cumulative damage for grain under temperature loading, a thermo-viscoelastic cumulative damage model of solid propellant was established using linear cumulative damage theory.The expression of cumulative damage was obtained based on the experimental data of creep destroy under different stress. Thermo-viscoelastic finite element analysis of grain was operated, and rules of the maximum Von Mises stress for the grain danger part along with temperature variation were obtained.The influence on cumulative damage of grain under different storage temperature was discussed.Cumulative damage for some solid motor grain under different storage temperature for typical sea areas were analyzed respectively. The results indicate that the temperature is crucial in affecting damage of grain, which is unnecessarily greater when under greater thermal stress state. Temperature, stress magnitude and time are factors codetermining the cumulative damage of SRM grain.

Key words: Temperature loading; Thermal viscoelasticity; Time-temperature shift factor; Cumulative damage

邓斌,杨东,段静波,申志彬. 温度载荷下的药柱累积损伤分析[J]. 推进技术, 2013, 34(2): 280-284.

DENG Bin¹, YANG Dong², DUAN Jing-bo¹, SHEN Zhi-bin¹. Cumulative Damage Analysis of Solid Rocket Motor Grain under Temperature Loading[J]. Journal of Propulsion Technology, 2013, 34(2): 280-284.

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