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논문 기본 정보

자료유형
학술저널
저자정보
Jianhui Hu (Shanghai Jiao Tong University) Wujun Chen (Shanghai Jiao Tong University) Chengjun Gao (Shanghai Jiao Tong University) Yibei Zhang (China Academy of Aerospace Science and Innovation) Yonglin Chen (Tongji University) Pujin Wang (Tongji University)
저널정보
국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.90 No.6
발행연도
2024.6
수록면
543 - 549 (7page)

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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.

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