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    Macro- and Micromechanical Behaviors and Energy Variation of Sandstone under Different Unloading Stress Paths with DEM

    Source: International Journal of Geomechanics:;2021:;Volume ( 021 ):;issue: 008::page 04021127-1
    Author:
    Chong Shi
    ,
    Junxiong Yang
    ,
    Weijiang Chu
    ,
    Hui Tang
    ,
    Yiping Zhang
    DOI: 10.1061/(ASCE)GM.1943-5622.0002106
    Publisher: ASCE
    Abstract: Various mechanical responses of rocks under a complex stress state have attracted the attention of engineers. A hollow cylinder torsional apparatus (HCA) was constructed using the discrete element method (DEM). A series of conventional triaxial compression tests under different confining pressures and a complex stress path test with torsion were conducted. The numerical results are consistent with laboratory and theoretical findings, which indicates that the microscopic parameters of the DEM sandstone specimens were correct and reasonable. Based on the HCA DEM specimen, the macro–micromechanical response of sandstone specimens under four typical unloading stress paths were studied, and variations in the strain energy density, strain energy, and dissipated energy of sandstone specimens were obtained. These results could provide a reference for the study of the mechanical properties of unloaded sandstone in geotechnical engineering.
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      Macro- and Micromechanical Behaviors and Energy Variation of Sandstone under Different Unloading Stress Paths with DEM

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4271442
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    contributor authorChong Shi
    contributor authorJunxiong Yang
    contributor authorWeijiang Chu
    contributor authorHui Tang
    contributor authorYiping Zhang
    date accessioned2022-02-01T00:26:33Z
    date available2022-02-01T00:26:33Z
    date issued8/1/2021
    identifier other%28ASCE%29GM.1943-5622.0002106.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4271442
    description abstractVarious mechanical responses of rocks under a complex stress state have attracted the attention of engineers. A hollow cylinder torsional apparatus (HCA) was constructed using the discrete element method (DEM). A series of conventional triaxial compression tests under different confining pressures and a complex stress path test with torsion were conducted. The numerical results are consistent with laboratory and theoretical findings, which indicates that the microscopic parameters of the DEM sandstone specimens were correct and reasonable. Based on the HCA DEM specimen, the macro–micromechanical response of sandstone specimens under four typical unloading stress paths were studied, and variations in the strain energy density, strain energy, and dissipated energy of sandstone specimens were obtained. These results could provide a reference for the study of the mechanical properties of unloaded sandstone in geotechnical engineering.
    publisherASCE
    titleMacro- and Micromechanical Behaviors and Energy Variation of Sandstone under Different Unloading Stress Paths with DEM
    typeJournal Paper
    journal volume21
    journal issue8
    journal titleInternational Journal of Geomechanics
    identifier doi10.1061/(ASCE)GM.1943-5622.0002106
    journal fristpage04021127-1
    journal lastpage04021127-14
    page14
    treeInternational Journal of Geomechanics:;2021:;Volume ( 021 ):;issue: 008
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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