Shear Properties of PVDF-Coated Fabrics under Multicyclic Biaxial Bias Extension
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 10
Abstract
In this study, the multicyclic biaxial bias extension test using cruciform specimens with 45°-oriented fibers was carried on an advanced biaxial tensile tester, and three different shear loading histories (SLHs) were utilized to estimate shear properties of polyvinylidene fluoride (PVDF)–coated fabrics. The distribution of shear strain in the area of interest was homogeneous according to the results of digital image correlation. The experimental results showed that shear stiffness of coated fabrics decreased from 11.4 to with the improvement of maximum shear stress. The normal stress in the warp and filling directions enhanced the shear stiffness according to the comparison among three shear loading histories. The reduction of residual shear strain indicated that the zero-shear-stress condition contributed to shear deformation recovery. Finally, the deformation mechanism of biaxial bias extension was considered on the basis of experimental observation. In general, this study proposed a specific test method to understand shear properties of coated fabrics used in membrane structures.
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Acknowledgments
The present work is supported by National Natural Science Foundation of China (Grant Nos. 51778362 and 51478264) and National Key R&D Program of China (Grant No. 2016YFB1200200). The fabrics used for all tests were supplied and the specimens were fabricated by Shanghai Taiyo Kogyo Co. Ltd., Shanghai, China. The authors acknowledge with thanks all this help and other unmentioned support.
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©2018 American Society of Civil Engineers.
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Received: Oct 11, 2017
Accepted: Feb 27, 2018
Published online: Jul 12, 2018
Published in print: Oct 1, 2018
Discussion open until: Dec 12, 2018
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