• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 57 Issue 5
Oct.  2022
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Article Contents
CHEN Long, WU Shunchuan, JIN Aibing. Particle Discrete Element Layered Modeling Method and Particle Size Effect[J]. Journal of Southwest Jiaotong University, 2022, 57(5): 1086-1095. doi: 10.3969/j.issn.0258-2724.20210023
Citation: CHEN Long, WU Shunchuan, JIN Aibing. Particle Discrete Element Layered Modeling Method and Particle Size Effect[J]. Journal of Southwest Jiaotong University, 2022, 57(5): 1086-1095. doi: 10.3969/j.issn.0258-2724.20210023

Particle Discrete Element Layered Modeling Method and Particle Size Effect

doi: 10.3969/j.issn.0258-2724.20210023
  • Received Date: 11 Jan 2021
  • Rev Recd Date: 16 May 2021
  • Available Online: 11 Jul 2022
  • Publish Date: 07 Sep 2021
  • Discrete element analysis method is one of the important tools for studying rock mechanics behavior and refining the basic theory of rock mechanics. In order to improve the accuracy of the particle discrete element method to simulate indoor rock mechanics and large-scale engineering scale tests, a layered modeling method is proposed. This method adopts small-size particles for fine simulation of the rock or key rock mass area, and large-size particles for the outside area to expand the calculation area. The layered modeling method is used to carry out uniaxial compression and Brazilian splitting tests, and compared with the conventional modeling calculation results, which preliminarily verifies its feasibility to simulate indoor mechanical tests. The results show that the layered modeling method is affected by the particle size like conventional modeling, but it can reduce the number of particles in the particle flow code model and increase the calculation efficiency by more than 50%. The uniaxial compressive strength and crack initiation stress of the layered model are reduced by only 2.7% and 1.9% at most, compared with those of the conventional model with the corresponding outer layer. The coefficient of variation (COV) of uniaxial compressive strength and crack initiation stress is generally larger than that of the conventional model, but it is still within the acceptable range of 2%. The inhomogeneity of particle size distribution in the layered model has minor effect on the deformation properties of the model at the elastic stage, and the elastic modulus of the layered model is reduced by 1.3%−2.3% compared with the conventional model with the corresponding outer layer. The overall Brazilian splitting tensile strength of the layered model is increased by 1.32%−2.35% compared to that of the conventional model with the corresponding outer layer, and the macroscopic fracture characteristics are similar to those of the conventional small-particle model, but there are more cracks near the loading plate.

     

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  • [1]
    CUNDALL P A. The measurement and analysis of acceleration on rock slopes[D]. London: University of London, 1971.
    [2]
    CUNDALL P A. UDEC—a generalized distinct element program for modelling jointed rock, peter cundall associates[R]. [S.l.]: European Research Office, 1980
    [3]
    CUNDALL P A, STRACK O D L. A discrete numerical model for granular assemblies[J]. Géotechnique, 1979, 29(1): 47-65.
    [4]
    ZHANG X P, WONG L N Y. Cracking processes in rock-like material containing a single flaw under uniaxial compression:a numerical study based on parallel bonded-particle model approach[J]. Rock Mechanics and Rock Engineering, 2012, 45(5): 711-737.
    [5]
    DUAN K, KWOK C Y, MA X. DEM simulations of sandstone under true triaxial compressive tests[J]. Acta Geotechnica, 2017, 12(3): 495-510. doi: 10.1007/s11440-016-0480-6
    [6]
    CAI M, KAISER P K. Numerical simulation of the Brazilian test and the tensile strength of anisotropic rocks and rocks with pre-existing cracks[J]. International Journal of Rock Mechanics and Mining Sciences, 2004, 41: 478-483. doi: 10.1016/j.ijrmms.2004.03.086
    [7]
    JIANG M J, LEROUEIL S, KONRAD J M. Insight into shear strength functions of unsaturated granulates by DEM analyses[J]. Computers and Geotechnics, 2004, 31(6): 473-489. doi: 10.1016/j.compgeo.2004.07.001
    [8]
    刘宁,张春生,褚卫江,等. 锦屏二级水电站深埋隧洞开挖损伤区特征分析[J]. 岩石力学与工程学报,2013,32(11): 2235-2241.

    LIU Ning, ZHANG Chunsheng, CHU Weijiang, et al. Excavation damaged zone characteristics in deep tunnel of Jinping Ⅱ hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(11): 2235-2241.
    [9]
    李涛,朱连华,李彬如,等. 深基坑开挖土拱效应影响因素研究[J]. 中国矿业大学学报,2017,46(1): 58-65. doi: 10.13247/j.cnki.jcumt.000626

    LI Tao, ZHU Lianhua, LI Binru, et al. Study of the influence factors of soil arching effect for deep foundation pit excavation[J]. Journal of China University of Mining & Technology, 2017, 46(1): 58-65. doi: 10.13247/j.cnki.jcumt.000626
    [10]
    WU S C, CHEN L, CHENG Z Q. Macro and meso research on the zonal disintegration phenomenon and the mechanism of deep brittle rock mass[J]. Engineering Fracture Mechanics, 2019, 211: 254-268. doi: 10.1016/j.engfracmech.2019.02.023
    [11]
    刘春,乐天呈,施斌,等. 颗粒离散元法工程应用的三大问题探讨[J]. 岩石力学与工程学报,2020,39(6): 1142-1152. doi: 10.13722/j.cnki.jrme.2019.0977

    LIU Chun, LE Tiancheng, SHI Bin, et al. Discussion on three major problems of engineering application of the particle discrete element method[J]. Chinese Journal of Rock Mechanics and Engineering, 2020, 39(6): 1142-1152. doi: 10.13722/j.cnki.jrme.2019.0977
    [12]
    POTYONDY D O, CUNDALL P A. A bonded-particle model for rock[J]. International Journal of Rock Mechanics and Mining Sciences, 2004, 41(8): 1329-1364. doi: 10.1016/j.ijrmms.2004.09.011
    [13]
    YANG B D, JIAO Y, LEI S T. A study on the effects of microparameters on macroproperties for specimens created by bonded particles[J]. Engineering Computations, 2006, 23(6): 607-631. doi: 10.1108/02644400610680333
    [14]
    YOON J. Application of experimental design and optimization to PFC model calibration in uniaxial compression simulation[J]. International Journal of Rock Mechanics and Mining Sciences, 2007, 44(6): 871-889. doi: 10.1016/j.ijrmms.2007.01.004
    [15]
    DING X B, ZHANG L Y, ZHU H H, et al. Effect of model scale and particle size distribution on PFC3D simulation results[J]. Rock Mechanics and Rock Engineering, 2014, 47(6): 2139-2156. doi: 10.1007/s00603-013-0533-1
    [16]
    XU X L, WU S C, GAO Y T, et al. Effects of micro-structure and micro-parameters on Brazilian tensile strength using flat-joint model[J]. Rock Mechanics and Rock Engineering, 2016, 49(9): 3575-3595. doi: 10.1007/s00603-016-1021-1
    [17]
    POTYONDY D O. PFC3D flat joint contact model[R]. Minneapolis: ITASCA Consulting Group, 2013.
    [18]
    WU S C, XU X L. A study of three intrinsic problems of the classic discrete element method using flat-joint model[J]. Rock Mechanics and Rock Engineering, 2016, 49(5): 1813-1830. doi: 10.1007/s00603-015-0890-z
    [19]
    SUITS L D, SHEAHAN T C, FUENKAJORN K, et al. Laboratory determination of direct tensile strength and deformability of intact rocks[J]. Geotechnical Testing Journal, 2011, 34(1): 103134. doi: 10.1520/GTJ103134
    [20]
    MA J, WU S C, ZHANG X P, et al. Modeling acoustic emission in the Brazilian test using moment tensor inversion[J]. Computers and Geotechnics, 2020, 123: 103567. doi: 10.1016/j.compgeo.2020.103567
    [21]
    NAKASHIMA S, TAGUCHI K, MORITOSHI A, et al. Loading conditions in the Brazilian test simulation by DEM[C]//47th US Rock Mechanics/Geomechanics Symposium, American Rock Mechanics Association. San Francisco: [s.n.], 2013: 1833-1838.
    [22]
    XU X L, WU S C, JIN A B, et al. Review of the relationships between crack initiation stress, mode I fracture toughness and tensile strength of geo-materials[J]. International Journal of Geomechanics, 2018, 18(10): 04018136.1-04018136.20.
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