东南大学学报（英文版）Issue(4)：467-474,8.DOI:10.3969/j.issn.1003-7985.2014.04.012
飞艇蒙皮材料双轴拉伸力学性能和弹性常数计算
Biaxial tensile properties and elastic constants evaluation of envelope material for airship
摘要
Abstract
This paper presents an experimental study to determine the tensile properties of the envelope fabric Uretek3216L under biaxial cyclic loading.First the biaxial cyclic tests were carefully carried out on the envelope material to obtain the stress-strain data and the corresponding nonlinearity and orthotropy of the material were analyzed. Then for some determination options with different stress ratios the least squares method minimizing the strain terms was used to calculate the elastic constants from the experimental data.Finally the influences of the determination options with different stress ratios and the reciprocal relationship on the elastic constants were discussed.Results show that the orthotropy of the envelope material can be attributed to the unbalanced crimp of their constitutive yarns in warp and weft directions and the elastic constants vary noticeably with the determination options as well as the normalized stress ratios.In real design practice it is more reasonable to use constants determined for specific stress states in particular stress ratios depending on the project's needs.Also calculating the structures with two limitative sets of elastic constants instead of using only one set is recommendable in light of the great variety of the constant's values.关键词
涂层织物/飞艇/拉伸性能/正交互补性质/弹性常数/应力比Key words
coated fabric/airship/tensile property/reciprocal relationship/elastic constant/stress ratio分类
航空航天引用本文复制引用
陈建稳,陈务军..飞艇蒙皮材料双轴拉伸力学性能和弹性常数计算[J].东南大学学报（英文版）,2014,(4):467-474,8.基金项目
The National Natural Science Foundation of China No．5127829950878128． （）
