Discontinuous Deformation Analysis with Potential Contact Forces

被引:9
|
作者
Xu, Dongdong [1 ]
Wu, Aiqing [1 ]
Wu, Yongjin [1 ]
机构
[1] Minist Water Resources, Changjiang River Sci Res Inst, Key Lab Geotech Mech & Engn, Wuhan 430010, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
Discontinuous deformation analysis (DDA); Open-close iteration; Contact potential; FEM-DEM; FINITE-ELEMENT-METHOD; SEISMIC RESPONSE ANALYSIS; NUMERICAL MANIFOLD METHOD; MESHFREE METHOD; FACE CONTACT; MODEL; SIMULATION; DDA; PROPAGATION; FRACTURE;
D O I
10.1061/(ASCE)GM.1943-5622.0001496
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
In conventional discontinuous deformation analysis (DDA), the procedure called open-close iteration is adopted to enforce the contact condition, which needs to repeatedly fix and remove the artificial springs between blocks in contact to determine real contact states. The open-close iteration belongs to the category of trial-and-error methods, in which convergence cannot be always guaranteed. Meanwhile, the contact force is treated as concentrated force, leading to the difficulties in determining the shear strength from cohesion and stresses in the contact area. The so-called potential contact force concept adopted in the combined finite-element method and discrete-element method (FEM-DEM) has been proved efficient and robust. In the FEM-DEM the contact force is treated as a distributed contact force, which is more realistic and was utilized in this study to tackle contacts. A major advantage over the conventional DDA lies in the elimination of the need to handle singular contact types that would incur huge difficulties in three-dimensional simulations. Therefore, a contact potential-based DDA (CPDDA) was developed by introducing potential contact forces. Some typical examples, including those originally designed by the DDA inventor, are reanalyzed, proving the feasibility of CPDDA.
引用
收藏
页数:12
相关论文
共 50 条
  • [31] Indeterminacy of the Vertex-vertex Contact in the 2D Discontinuous Deformation Analysis
    Bao, H. R.
    Zhao, Z. Y.
    ANALYSIS OF DISCONTINUOUS DEFORMATION: NEW DEVELOPMENTS AND APPLICATIONS, 2010, : 99 - 107
  • [32] A new model of edge-to-edge contact for three dimensional discontinuous deformation analysis
    Mousakhani, M.
    Jafari, A.
    GEOMECHANICS AND GEOENGINEERING-AN INTERNATIONAL JOURNAL, 2016, 11 (02): : 135 - 148
  • [33] Discontinuous deformation and displacement analysis: From continuous to discontinuous
    TANG ChunAn
    TANG ShiBin
    GONG Bin
    BAI HongMei
    Science China(Technological Sciences), 2015, (09) : 1567 - 1574
  • [34] Discontinuous deformation and displacement analysis: From continuous to discontinuous
    Tang ChunAn
    Tang ShiBin
    Gong Bin
    Bai HongMei
    SCIENCE CHINA-TECHNOLOGICAL SCIENCES, 2015, 58 (09) : 1567 - 1574
  • [35] Discontinuous deformation and displacement analysis: From continuous to discontinuous
    ChunAn Tang
    ShiBin Tang
    Bin Gong
    HongMei Bai
    Science China Technological Sciences, 2015, 58 : 1567 - 1574
  • [36] Discontinuous deformation and displacement analysis: From continuous to discontinuous
    TANG ChunAn
    TANG ShiBin
    GONG Bin
    BAI HongMei
    Science China(Technological Sciences), 2015, 58 (09) : 1567 - 1574
  • [37] A robust potential-based contact force solution approach for discontinuous deformation analysis of irregular convex polygonal block/particle systems
    Fei Zheng
    Xiaoying Zhuang
    Hong Zheng
    Yu-Yong Jiao
    Timon Rabczuk
    Acta Geotechnica, 2021, 16 : 679 - 697
  • [38] Modeling Wave Propagation in Rock Masses Using the Contact Potential-Based Three-Dimensional Discontinuous Deformation Analysis Method
    Yang, Yongtao
    Xu, Dongdong
    Zheng, Hong
    Wu, Zhijun
    Huang, Da
    ROCK MECHANICS AND ROCK ENGINEERING, 2021, 54 (05) : 2465 - 2490
  • [39] A robust potential-based contact force solution approach for discontinuous deformation analysis of irregular convex polygonal block/particle systems
    Zheng, Fei
    Zhuang, Xiaoying
    Zheng, Hong
    Jiao, Yu-Yong
    Rabczuk, Timon
    ACTA GEOTECHNICA, 2021, 16 (03) : 679 - 697
  • [40] Modeling Wave Propagation in Rock Masses Using the Contact Potential-Based Three-Dimensional Discontinuous Deformation Analysis Method
    Yongtao Yang
    Dongdong Xu
    Hong Zheng
    Zhijun Wu
    Da Huang
    Rock Mechanics and Rock Engineering, 2021, 54 : 2465 - 2490