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  • Structural Membranes: VIII International Conference on Textile Composites and Inflatable Structures (MEMBRANES 2017), Munich, 9-11 October, 2017
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  • Structural Membranes: International Conference on Textile Composites and Inflatable Structures
  • Structural Membranes: VIII International Conference on Textile Composites and Inflatable Structures (MEMBRANES 2017), Munich, 9-11 October, 2017
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Fracture failure analysis and bias tearing strength criterion for PVDF coated bi-axial warp knitted fabrics

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hdl:2117/185097

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Chen, Jianwen
Chen, Wujun
Wang, Mingyang
Yao, Bo
Zhou, Han
Zhao, Bing
Hu, Jianhui
Document typeConference report
Defense date2017
PublisherCIMNE
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
This paper concerns the fracture failure and bias tearing strength criterion for a PVDF coated bi-axial warp knitted fabrics (BWKFs) widely used in air supported membrane structures (ASMSs). Central slit tearing tests were carefully conducted on bias specimens with seven off-axis angles, and the corresponding tearing properties, including failure behaviors and tearing strength criterion were discussed. Results show that coated bi-axial warp knitted fabrics are typical direction-depended materials, and their tearing characteristics vary greatly with the bias angles. Typical tearing stress-displacement curves of bias samples could exhibit four characteristic regions: a co-deformation region, a shear deformation region, a plateau region, and a post peak region. No matter what the orientation of the initial slit or the yarn is, the propagation is always parallel to the secondary yarns. For specimens with different bias angles, some obvious differences in tearing behaviors are observed in terms of maximum displacement, damage mode, curve slope, and number of stress peaks, and these differences could be attributed to the material orthotropy and different failure mechanism of constituent materials. Unlike results of tensile strength for most of woven fabrics, for the studied BWKF composite, there is a W-shaped relationship between tearing strength and bias angle, with a local strength peak at 45o angle. The new tearing strength criterion proposed in the prior research is validated due to the strong agreements between the calculated and experimental results for the BWKF.
URIhttp://hdl.handle.net/2117/185097
ISBN978-84-946909-9-0
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  • Structural Membranes: International Conference on Textile Composites and Inflatable Structures - Structural Membranes: VIII International Conference on Textile Composites and Inflatable Structures (MEMBRANES 2017), Munich, 9-11 October, 2017 [43]
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