[1] Chen Jianwen, Chen Wujun,. Biaxial tensile properties and elastic constants evaluationof envelope material for airship [J]. Journal of Southeast University (English Edition), 2014, 30 (4): 467-474. [doi:10.3969/j.issn.1003-7985.2014.04.012]

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Biaxial tensile properties and elastic constants evaluationof envelope material for airship()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

30

Issue:

2014 4

Page:

467-474

Research Field:

Other Disciplines

Publishing date:

2014-12-31

Info

Title:

Biaxial tensile properties and elastic constants evaluationof envelope material for airship

Author(s):

Chen Jianwen;  Chen Wujun

Research Center of Spatial Structures, Shanghai Jiaotong University, Shanghai 200030, China

Keywords:

coated fabric;  airship;  tensile property;  reciprocal relationship;  elastic constant;  stress ratio

PACS:

V258.3

DOI:

10.3969/j.issn.1003-7985.2014.04.012

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.

References:

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Memo

Memo:

Biographies: Chen Jianwen(1981—), male, graduate; Chen Wujun(corresponding author), male, doctor, professor, cwj@sjtu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.51278299, 50878128).
Citation: Chen Jianwen, Chen Wujun. Biaxial tensile properties and elastic constants evaluation of envelope material for airship[J].Journal of Southeast University(English Edition), 2014, 30(4):467-474.[doi:10.3969/j.issn.1003-7985.2014.04.012]

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