摘要
目的研究一类硬质泡沫塑料弹架结构的贮存特性和本构关系。方法首先对结构试件进行高温压缩蠕变试验,然后对压缩后试件蠕变性能进行分析,得到材料高温压缩蠕变曲线,在此基础上用WLF方程对试件的贮存寿命进行评估,推算出试件达到特定蠕变量所需时间。结果基于试验所得材料应力-应变曲线,用数值拟合的方法建立了试件材料的压缩本构关系。结论证实了在高温压缩蠕变试验过程中材料本构关系未发生变化,研究结果可为后续型号结构试件寿命评估和失效机理研究提供参考。
Objective To study the storage property and constitutive relation of the rigid foamed plastic missile-launcher. Methods Firstly, the compression creep test under high temperature was carried on to the specimen,secondly, the creep performance of the compressed specimen was analyzed to get the compression creep curve, on the basis of which the WLF equation was used to evaluate the storage time limit. Results Based on the stress-strain curve of the specimen material, the compressive constitutive relation of the material was founded by numerical simulation.Conclusion The constitutive relation had no changes during the compression creep test, the study can provide reference for life estimation and invalidation mechanism studies of following series of test specimens.
出处
《装备环境工程》
CAS
2016年第1期139-146,共8页
Equipment Environmental Engineering
基金
国防基础科研项目(11172046)~~
关键词
硬质泡沫塑料
弹架结构
贮存特性
本构关系
蠕变试验
rigid foamed plastic
missile-launcher
storage property
constitutive relation
creep test
作者简介
宫晓春（1981-），男，博士，高级工程师，主要研究方向为环境可靠性试验技术与综合离心试验技术。
