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Volume 38 Issue zk1
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ZHOU Tian-e, SHU Yi-ming, WU Hai-min, ZHANG Xian-lei, LIU Yun-feng, HAO Xue-hang. Optimization of PVC geomembrane specimens for biaxial tensile tests[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(zk1): 62-68. DOI: 10.11779/CJGE2016S1011
Citation: ZHOU Tian-e, SHU Yi-ming, WU Hai-min, ZHANG Xian-lei, LIU Yun-feng, HAO Xue-hang. Optimization of PVC geomembrane specimens for biaxial tensile tests[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(zk1): 62-68. DOI: 10.11779/CJGE2016S1011
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Optimization of PVC geomembrane specimens for biaxial tensile tests

  • 1. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China;
    2. State Key Laboratory of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China

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  • Received Date: November 29, 2015
  • Published Date: March 24, 2016
    Graphical Abstract
    • Abstract
  • The most common PVC geomembrane specimen used in biaxial tensile tests is a traditional cruciform one characterized by four rectangular clamp arms, intersection of which is connected by a corner fillet. Based on the traditional cruciform specimen, the maximum measured true strain in the central area can only reach 30%, which is far less than the prospective strain level under biaxial tension loads for PVC geomembrane. In order to get a more complete stress-strain curve of this material, a reinforced dumbbell-shaped specimen is designed on the basis of the traditional specimen by means of a coupled method of numerical simulation and experiment verification. The results of verification tests show that this new specimen presents high and evenly-distributed stress and low degree of stress concentration in biaxial tension states. The maximum true strain obtained at failure time can reach 100.4%, indicating that the reinforced dumbbell-shaped specimen can meet the demands of mechanical property research of PVC geomembrane under biaxial tension states.
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    • References (17)
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