摘要
目的研究一类硬质泡沫弹架结构的蠕变特性和贮存寿命评估方法。方法通过测定贮存恒定应力水平下该型硬质泡沫弹架的温度加速蠕变性能数据,建立泡沫弹架材料的蠕变本构关系,研究泡沫弹架材料的蠕变时温等效规律。在此基础上,开展泡沫弹架的高温加速贮存试验与评估方法研究。结果在高温蠕变试验后,该型硬质泡沫材料的本构关系及压缩特性均未发生明显变化,蠕变特性是影响硬质泡沫材料长贮失效关键敏感因素。结论根据时温等效原理和WLF方程,设计并开展了硬质泡沫弹架的加速贮存试验,研究成果为系统级弹架结构的贮存寿命评定与延寿研究提供技术支撑。
The creep characteristics and the evaluation method of storage life to rigid foams were researched in this paper.The creep constitutive relation of the foam bombardment materials was established based on the creep performance data by measuring the rigid foam bombs at a constant temperature stress level.Then the temperature-time equivalent theory and the high temperature accelerated storage test method of the foam shells were studied.The creep constitutive relation and the compressive parameter of the rigid foam made no evident change after the high temperature creep test.The creep characteristics were the key sensitive factors affecting the long-term storage failure of rigid foams.The accelerated storage method of the rigid foam cartridge based on the temperature-time equivalent theory and the WLF equation was worked out to support the storage life assessment and life extension research of the entire cartridge structure.
作者
秦玉灵
宫晓春
李晓东
王巨民
渠弘毅
QIN Yu-ling;GONG Xiao-chun;LI Xiao-dong;WANG Ju-min;QU Hong-yi(Beijing Institute of Space Long March Vehicle,Beijing 100076,China;Beijing Institute of Structure and Environment Engineering,Beijing 100076,China)
出处
《装备环境工程》
CAS
2022年第4期22-27,共6页
Equipment Environmental Engineering
基金
国防基础科研项目(11172046)。
关键词
硬质泡沫弹架
蠕变特性
本构关系
时温等效
加速贮存
rigid foam cartridge
creep characteristics
constitutive relation
temperature-time equivalent
accelerated storage
作者简介
秦玉灵(1982—),女,博士,高级工程师,主要研究方向为环境强度设计技术。
