IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v15y2022i5p1885-d763708.html
   My bibliography  Save this article

Stable Crack Propagation Model of Rock Based on Crack Strain

Author

Listed:
  • Xiao Huang

    (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China
    Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210024, China)

  • Chong Shi

    (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China
    Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210024, China)

  • Huaining Ruan

    (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China
    Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210024, China)

  • Yiping Zhang

    (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China
    Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210024, China)

  • Wei Zhao

    (School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China)

Abstract

The establishment of a rock constitutive model considering microcrack propagation characteristics is an important channel to reflect the progressive damage and failure of rocks. The prepeak crack strain evolution curve of rock is divided into three stages based on the triaxial compression test results of granite and the definition of crack strain. According to the nonlinear variation characteristics of crack strain in the stage of rock crack stable propagation, rock deformation is expressed as the sum of matrix strain and crack strain. Then, the exponential constitutive relationship of rock crack stable propagation is deduced. The axial crack strains of the rock sample and its longitudinal section are equal. Thus, the longitudinal symmetry plane of the rock sample is abstracted as a model containing sliding crack structure in an elastic body, and the evolution equation of crack geometric parameters in the process of stable crack propagation is obtained. Compared with the experimental data, results show that the rock crack stable propagation model based on crack strain can adequately describe the evolution law of crack strain and wing crack length. In addition, the wing crack propagates easily when the elastic body with small width contains an initial crack with a large length and an axial dip angle of 45° under compressive load. This study provides a new idea for the analysis of the stable propagation characteristics and laws of rock cracks under compressive load.

Suggested Citation

  • Xiao Huang & Chong Shi & Huaining Ruan & Yiping Zhang & Wei Zhao, 2022. "Stable Crack Propagation Model of Rock Based on Crack Strain," Energies, MDPI, vol. 15(5), pages 1-13, March.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:5:p:1885-:d:763708
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/15/5/1885/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/15/5/1885/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Chun Zhu & Shengqi Yang & Yuanyuan Pu & Lijun Sun & Min Wang & Kun Du, 2023. "Advanced Progress of the Geo-Energy Technology in China," Energies, MDPI, vol. 16(19), pages 1-6, September.

    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:15:y:2022:i:5:p:1885-:d:763708. 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.