某型硬质泡沫弹架蠕变特性及贮存寿命研究

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...

Creep Properties and Accelerated Storage Test Method of Rigid Foam Cartridge

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.