Y-Geo: New Combined Finite-Discrete Element Numerical Code for Geomechanical Applications. The purpose of this paper is to present Y-Geo, a new numerical code for geomechanical applications based on the combined finite-discrete element method (FDEM). FDEM is an innovative numerical technique that combines the advantages of continuum-based modeling approaches and discrete element methods to overcome the inability of these methods to capture progressive damage and failure processes in rock. In particular, FDEM offers the ability to explicitly model the transition from continuum to discontinuous behavior by fracture and fragmentation processes. Several algorithmic developments have been implemented in Y-Geo to specifically address a broad range of rock mechanics problems. These features include (1) a quasi-static friction law, (2) the Mohr-Coulomb failure criterion, (3) a rock joint shear strength criterion, (4) a dissipative impact model, (5) an in situ stress initialization routine, (6) a material mapping function (for an exact representation of heterogeneous models), and (7) a tool to incorporate material heterogeneity and transverse isotropy. Application of Y-Geo is illustrated with two case studies that span the capabilities of the code, ranging from laboratory tests to complex engineering-scale problems

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  1. Liu, Xuewei; Chen, Haixiao; Liu, Quansheng; Liu, Bin; He, Jun: Modelling slurry flowing and analyzing grouting efficiency under hydro-mechanical coupling using numerical manifold method (2022)
  2. Sun, Hao; Xiong, Feng; Wu, Zhijun; Ji, Jian; Fan, Lifeng: An extended numerical manifold method for two-phase seepage-stress coupling process modelling in fractured porous medium (2022)
  3. Deng, Penghai; Liu, Quansheng; Huang, Xing; Ma, Hao: A new hysteretic damping model and application for the combined finite-discrete element method (FDEM) (2021)
  4. Yan, Chengzeng; Tong, Yao; Luo, Zhiqiang; Ke, Wenhui; Wang, Gang: A two-dimensional grouting model considering hydromechanical coupling and fracturing for fractured rock mass (2021)
  5. Yan, Chengzeng; Zheng, Yuchen; Huang, Duruo; Wang, Gang: A coupled contact heat transfer and thermal cracking model for discontinuous and granular media (2021)
  6. Guo, Liwei; Xiang, Jiansheng; Latham, John-Paul; Izzuddin, Bassam: A generic computational model for three-dimensional fracture and fragmentation problems of quasi-brittle materials (2020)
  7. Liu, Xunnan; Zhao, Lanhao; Mao, Jia; Li, Tongchun: Tangential force model for the combined finite-discrete element method (2020)
  8. Wu, Zhijun; Zhou, Yuan; Weng, Lei; Liu, Quansheng; Xiao, Yang: Investigation of thermal-induced damage in fractured rock mass by coupled FEM-DEM method (2020)
  9. Wang, Yanhai; Yang, Yongtao; Zheng, Hong: On the implementation of a hydro-mechanical coupling model in the numerical manifold method (2019)
  10. Hattori, Gabriel; Trevelyan, Jon; Augarde, Charles E.; Coombs, William M.; Aplin, Andrew C.: Numerical simulation of fracking in shale rocks: current state and future approaches (2017)
  11. Baraldi, Daniele; Cecchi, Antonella: Discrete approaches for the nonlinear analysis of in plane loaded masonry walls: molecular dynamic and static algorithm solutions (2016)
  12. Baraldi, Daniele; Cecchi, Antonella; Tralli, Antonio: Continuous and discrete models for masonry like material: a critical comparative study (2015)