Volume 13, Issue 4 (December 1990)

    Split-Hopkinson Pressure Bar Testing of Unsaturated Sand


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    High amplitude, split-Hopkinson pressure bar (SHPB) laboratory tests were conducted on compacted specimens of 50/80 silica sand to evaluate the influence of saturation on compressional-stress wave velocity, stress transmission, and attenuation. Stress wave velocity and transmitted stress increase as the saturation increases from 0 to 30 to 40% for constant input stress and constant dry density. At saturation levels between 40 to 95%, both the wave speed and the transmitted stress decrease with increasing saturation. Quasistatic confined modulus show similar trends. These trends may be explained by capillary pressure.

    Author Information:

    Charlie, WA
    Professor, Colorado State University, Fort Collins, CO

    Ross, CA
    Visiting professor, HQ, Air Force Engineering and Services Center, RDCM, Tyndall AFB, FL

    Pierce, SJ
    Staff geotechnical engineer, ESA Consultants, Fort Collins, CO

    Stock #: GTJ10172J

    ISSN: 0149-6115

    DOI: 10.1520/GTJ10172J

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    Title Split-Hopkinson Pressure Bar Testing of Unsaturated Sand
    Symposium , 0000-00-00
    Committee D18