›› 2011, Vol. 32 ›› Issue (12): 3780-3786.

• Numerical Analysis • Previous Articles     Next Articles

Numerical simulation of fracture propagation of heterogeneous rock material based on digital image processing

ZHU Ze-qi1, XIAO Pei-wei2, SHENG Qian1, LIU Ji-guo3, LENG Xian-lun1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Daduhe Hydropower Development Co., Ltd., Chengdu 610041, China; 3. China Second Highway Survey, Design and Research Institute of Communications, Wuhan 430056, China
  • Received:2010-06-07 Online:2011-12-10 Published:2011-12-13

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Abstract: For the Three Gorges granite, a finite difference software package FLAC is used to study failure process of heterogeneous rock material. Firstly, proper scale of finite difference grids is under consideration with scanning electron microscopy photo of the granite. Based on mineral components identification results of the granite and fuzzy clustering method, the actual image data are transformed into the finite difference grid by applying image processing techniques. A convenient and efficient two-dimensional numerical modeling method for heterogeneous geomaterials is presented. Furthermore, shear bond propagation and failure process of the granite are simulated in uniaxial compression test based on experimental strain soft model; and stress concentration phenomena are analyzed. Finally, numerical simulation of granite samples under different triaxial compression tests is studied. The results show that the numerical modeling method based on digital image processing can be used to calculate the mechanical responses of geomaterials by taking their heterogeneities into considerations.

Key words: digital image processing, heterogeneous material, fuzzy clustering, fracture process, numerical simulation

CLC Number: 

  • TU 45
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