Structural Engineering and Mechanics

  • 제90권6호
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  • Pages.543-549
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  • 2024
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Poisson's ratios of fabric materials in use for large-span membrane structures

  • Jianhui Hu (Space Structures Research Center, Sichuan Research Institute, State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University) ;
  • Wujun Chen (Space Structures Research Center, Sichuan Research Institute, State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University) ;
  • Chengjun Gao (Space Structures Research Center, Sichuan Research Institute, State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University) ;
  • Yibei Zhang (China Academy of Aerospace Science and Innovation) ;
  • Yonglin Chen (School of Civil Engineering, School of Aerospace Engineering and Applied Mechanics, Tongji University) ;
  • Pujin Wang (School of Civil Engineering, School of Aerospace Engineering and Applied Mechanics, Tongji University)
  • 투고 : 2023.10.06
  • 심사 : 2024.04.23
  • 발행 : 2024.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

The utilization of the fabric materials for lightweight building structures has attracted considerable attention due to the multiple functions and high strength-to-weight ratio. The mechanical properties of the fabric materials evolve with the loading cycle, especially for the Poisson's ratio that requires the full cyclic strain to determine the accurate values. The digital image correlation method has been justified but needs to meet the flexibility and complexity requirements of the fabric materials. This paper thus proposes a modified digital image correlation method to quantify the Poisson's ratio of fabric materials. To obtain the accurate Poisson's ratio of fabric materials in the cyclic experiments using non-contact measuring method, a speckle generation of the digital image correlation method is implemented to obtain the strain distribution and strain characteristics. The uniaxial cyclic experiments for the fabric materials are carried out in the warp, weft and 45° directions. The digital image correlation photos are taken when the material properties become stable in the cyclic loading. The results show that the strain distributions are non-uniform and dependent on the specimen directions. The reliable Poisson's ratios of the fabric materials in the warp, weft and 45° directions are 0.016, 1.2 and 2.6. The strain asymmetry at the maximum strain position is related with the weaving architecture. These observations and results are indispensable to understand the Poisson's ratios of fabric materials and to guide the proper analysis of the large-span membrane structures.

키워드

과제정보

The work was supported by National Natural Science Foundation of China (No. 52278193, 51608320), Shanghai Pujiang Program (No. 22PJ1405600), and Shanghai Municipal Administrative Committee of Housing and Urban-Rural Development (No. 2023-Z02-012). The authors are grateful to the editors and anonymous reviewers for the professional comments and suggestions in improving the quality of the paper.

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