IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v12y2019i9p1636-d227082.html
   My bibliography  Save this article

Dynamic Crack Initiation Toughness of Shale under Impact Loading

Author

Listed:
  • Guoliang Yang

    (School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
    State Key Laboratory for Geomechanics and Deep Underground Engineering (Beijing), Beijing 100083, China)

  • Xuguang Li

    (School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Jingjiu Bi

    (School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Shuaijie Cheng

    (School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

Abstract

The impact loading of a notched semi-circular bend (NSCB) specimen of outcrop shale in Changning Sichuan was carried out using a split Hopkinson pressure bar (SHPB) to study the effect of shale bedding on the dynamic crack initiation toughness. Three loading configurations were tested: Crack-divider, Crack-splitter and Crack-arrester loading. Bedding plane has a significant effect on the crack initiation of shale. Under the Crack-divider and Crack-splitter modes, shale had lower dynamic crack initiation toughness. The dynamic crack initiation toughness of the shale was affected by the loading rate for all three loading configurations. The correlation between loading rate and dynamic crack initiation toughness was most significant for the Crack-arrester mode, while the Crack-splitter mode was the weakest. When loading was carried out on Crack-arrester, the bedding plane could change the direction of crack growth. In the Crack-splitter mode, only a small impact energy was needed to achieve effective expansion of a crack. The research results provide a theoretical basis for shale cracking.

Suggested Citation

  • Guoliang Yang & Xuguang Li & Jingjiu Bi & Shuaijie Cheng, 2019. "Dynamic Crack Initiation Toughness of Shale under Impact Loading," Energies, MDPI, vol. 12(9), pages 1-9, April.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:9:p:1636-:d:227082
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/12/9/1636/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/12/9/1636/
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:12:y:2019:i:9:p:1636-:d:227082. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.