Volume 37, Issue 1 (January 2009)

    Experimental determination of coupled thermal-mechanical effects on fracture toughness of sandstone

    (Received 10 November 2007; accepted 14 October 2008)

    Published Online: 2008

    CODEN: JTEOAD

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    Abstract

    In situ observations of the microscopic failure evolvement of sandstone under the coupled thermal-mechanical loadings were carried out by a scanning electron microscope (SEM). These results indicate that the effects of temperatures on cracking behavior and fracture toughness of sandstone are obvious. And, it is found that a critical transforming temperature is about 150°C for the fracture toughness of sandstone. That is, the fracture toughness value is to increase exponentially when the range of the temperature is from 25 to 150°C, but decreases exponentially when the range of the temperature is from 150 to 300°C. Therefore, in the present work the exponential relationships between fracture toughness and temperature are reported first. This is in good agreement with existing experimental evidence for the growth of micro cracks and thermal cracking.


    Author Information:

    Zuo, Jian-ping
    China University of Mining and Technology, Beijing,

    China University of Mining and Technology, Beijing,

    Xie, He-ping
    China University of Mining and Technology, Beijing,

    Sichuan University, Chengdu,

    Zhou, Hong-wei
    China University of Mining and Technology, Beijing,

    China University of Mining and Technology, Beijing,


    Stock #: JTE101542

    ISSN: 0090-3973

    DOI: 10.1520/JTE101542

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    Title Experimental determination of coupled thermal-mechanical effects on fracture toughness of sandstone
    Symposium , 0000-00-00
    Committee D18