›› 2012, Vol. 33 ›› Issue (7): 2021-2026.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A mesomechanical model with spatial correlation scale character and its application

TANG Xin-wei1, ZHOU Yuan-de2, ZHANG Chu-han2   

  1. 1. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China; 2. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2012-02-27 Online:2012-07-11 Published:2012-07-13

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Abstract: Natural rocks show highly heterogeneous character on the micro- and meso-scales due to the randomly distributed defects. Based on the continuum mechanics framework, a scalar damage model is presented for simulating the deformation and failure process of rock material on the meso-scale. A spatial correlation scale factor is developed into the conventional Weibull random distribution model such that the spatial correlation characters of the physico-mechanical indices of rock material can be considered in numerical model. A series of uniaxial tensile tests on sandstone are chosen for parametric analyses aiming for investigation into the influence of spatial correlation scale factor in the random field on the load-cut opening degree curves and failure behavior. The modeling results demonstrate that the value of the spatial correlation scale factor for physico-mechanical indices of rock material can significantly influence the evaluation of mechanical parameters as well as the damage and failure pattern.

Key words: rock, heterogeneity, mesomechanics, Weibull distribution, spatial correlation scale

CLC Number: 

  • TU 45
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