湖南大学学报（自然科学版）2013，Vol.40Issue(6)：40-46,7.
浮空器膜材循环拉伸力学性能及弹性常数研究
Study of the Mechanical Properties and Elastic Constants of Aerostat Envelope Fabric under Cyclic Tensile Loading
摘要
Abstract
Series tests were carried out for the new airship envelope fabric Uretek3216L.First,uni-axial cyclic tests were conducted.And then,on the basis of the multi-function bi-axial tension tester developed in SSRC,bi-axial tension tests with five stress ratios were carried out with particular test protocol.Detailed experiment results and elastic modulus and Poisson's ratio were obtained.The stress-strain relationship and elastic modulus of the membrane material under uni-axial tests and bi-axial tests were obtained at different cycle numbers.Moreover,the relation formula between coupled elastic modulus and stress ratios was proposed and bi-axial stress-strain surfaces were presented.The results have shown that,for the uni-axial cyclic tests,from the 1st to the 15th,the elastic moduli increase by 20.7％ in warp and 39.1％ in weft of the initial elastic modulus respectively;and the 2nd cycle has the biggest increments in both directions,which are about 60％ of the total increment in relevant direction.For bi-axial tensile tests,when the stress ratio increases,the warp direction's coupled elastic moduli increase and the weft direction's decrease gradually.关键词
浮空器膜材/双轴拉伸试验/3D应力应变响应面/弹性模量/循环拉伸试验Key words
envelope fabric of aerostat/bi-axial tensile test/3D stress-strain response surface/elastic moduli/cyclic tensile test分类
航空航天引用本文复制引用
陈建稳,陈务军,赵兵..浮空器膜材循环拉伸力学性能及弹性常数研究[J].湖南大学学报（自然科学版）,2013,40(6):40-46,7.基金项目
国家自然科学基金资助项目(50878128,11172180) （50878128,11172180）
