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    Particle-Based Numerical Manifold Method to Model Dynamic Fracture Process in Rock Blasting

    Source: International Journal of Geomechanics:;2017:;Volume ( 017 ):;issue: 005
    Author:
    Xing Li
    ,
    Qian-Bing Zhang
    ,
    Lei He
    ,
    Jian Zhao
    DOI: 10.1061/(ASCE)GM.1943-5622.0000748
    Publisher: American Society of Civil Engineers
    Abstract: A particle-based numerical manifold method (PNMM) is developed to investigate rock fracturing behavior under dynamic loading. The basic idea of PNMM is to represent the microstructure of rock with a group of particles and to simulate the macroscopic behavior of rock masses through polygonal elements, which is performed by a dual-level discretization system. The first discretization is in the manner of FEM, which reduces the infinite degrees of freedom (DOF) of a continuum to the finite DOF of polygonal elements. However, the DOF of the model are not further affected by the latter discretization. The behaviors of internal particles are obtained from the mechanical fields of their governing elements. A dual-layer-cover system, i.e., the mathematical cover and the physical cover, is adopted in PNMM. Fracture initiation and propagation at a macroscopic level are represented as the coalescence of microcracks induced at the microscale level between particles. The Johnson-Holmquist-Beissel (JHB) model is incorporated into PNMM to simulate a borehole blasting under dynamic loading conditions. Numerical simulations show a good agreement with experimental and numerical results in the literature.
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      Particle-Based Numerical Manifold Method to Model Dynamic Fracture Process in Rock Blasting

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4240091
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    • International Journal of Geomechanics

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    contributor authorXing Li
    contributor authorQian-Bing Zhang
    contributor authorLei He
    contributor authorJian Zhao
    date accessioned2017-12-16T09:13:15Z
    date available2017-12-16T09:13:15Z
    date issued2017
    identifier other%28ASCE%29GM.1943-5622.0000748.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4240091
    description abstractA particle-based numerical manifold method (PNMM) is developed to investigate rock fracturing behavior under dynamic loading. The basic idea of PNMM is to represent the microstructure of rock with a group of particles and to simulate the macroscopic behavior of rock masses through polygonal elements, which is performed by a dual-level discretization system. The first discretization is in the manner of FEM, which reduces the infinite degrees of freedom (DOF) of a continuum to the finite DOF of polygonal elements. However, the DOF of the model are not further affected by the latter discretization. The behaviors of internal particles are obtained from the mechanical fields of their governing elements. A dual-layer-cover system, i.e., the mathematical cover and the physical cover, is adopted in PNMM. Fracture initiation and propagation at a macroscopic level are represented as the coalescence of microcracks induced at the microscale level between particles. The Johnson-Holmquist-Beissel (JHB) model is incorporated into PNMM to simulate a borehole blasting under dynamic loading conditions. Numerical simulations show a good agreement with experimental and numerical results in the literature.
    publisherAmerican Society of Civil Engineers
    titleParticle-Based Numerical Manifold Method to Model Dynamic Fracture Process in Rock Blasting
    typeJournal Paper
    journal volume17
    journal issue5
    journal titleInternational Journal of Geomechanics
    identifier doi10.1061/(ASCE)GM.1943-5622.0000748
    treeInternational Journal of Geomechanics:;2017:;Volume ( 017 ):;issue: 005
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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