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Effect of Viscoelasticity on Soil-Geomembrane Contact Surfaces

Mosawi, Mohammad
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1367159331

Abstract Details

2013, Master of Science (M.S.), University of Dayton, Civil Engineering.
Geosynthetics are widely used in geotechnical engineering projects. For instance, Geomembranes are one of the most commonly used geosynthetic type and they are used to provide impervious boundary. Geomembranes are usually made from high-density polyethylene (HDPE). When geomembranes are installed on sloping grounds, the soil geomembrane interface usually forms the critical planes due to low shear strength at the soil and geomembrane interface. In addition, HDPE is a viscoelastic material and has time-dependent properties. Under the constant applied stress, geomembrane made out of HDPE exhibit creep behavior and the strains increase with time. On the other hand, when a constant strain is applied, the material exhibit stress relaxation behavior and the stresses decrease with time. Taking into consideration this viscoelastic behavior, under a constant overburden soil load, the soil particles will continue to penetrate into the geomembrane that they are in contact with. These increase penetrations will increase the contact areas at the soil-geomembrane interface. It is expected that this would increase the interface shear strength, resulting in increased factor of safety for sliding. Therefore, it is important to characterize the change of soil-geomembrane contact areas with time. This would allow to model interface shear strength for various conditions. This thesis presents an experimental study conducted to model the change of soil-geomembrane interface contact areas with time.
Omer Bilgin (Advisor)
Whitney Thomas (Committee Member)
Toubia Elias (Committee Member)
109 p.
Civil Engineering
viscoelasticity; geomembrane; area-change; friction; shear; adhesion

Recommended Citations

Citations

  • Mosawi, M. (2013). Effect of Viscoelasticity on Soil-Geomembrane Contact Surfaces [Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1367159331

    APA Style (7th edition)

  • Mosawi, Mohammad. Effect of Viscoelasticity on Soil-Geomembrane Contact Surfaces. 2013. University of Dayton, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1367159331.

    MLA Style (8th edition)

  • Mosawi, Mohammad. "Effect of Viscoelasticity on Soil-Geomembrane Contact Surfaces." Master's thesis, University of Dayton, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1367159331

    Chicago Manual of Style (17th edition)

dayton1367159331
878
© 2013, some rights reserved.Creative Commons License Effect of Viscoelasticity on Soil-Geomembrane Contact Surfaces by Mohammad Mosawi is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Dayton and OhioLINK.