• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
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Volume 26 Issue 4
Aug.  2013
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Article Contents
ZAN Yuewen, YU Maohong. Generalized Nonlinear Unified Strength Theory of Rock[J]. Journal of Southwest Jiaotong University, 2013, 26(4): 616-624. doi: 10.3969/j.issn.0258-2724.2013.04.005
Citation: ZAN Yuewen, YU Maohong. Generalized Nonlinear Unified Strength Theory of Rock[J]. Journal of Southwest Jiaotong University, 2013, 26(4): 616-624. doi: 10.3969/j.issn.0258-2724.2013.04.005

Generalized Nonlinear Unified Strength Theory of Rock

doi: 10.3969/j.issn.0258-2724.2013.04.005
  • Received Date: 06 Sep 2012
  • Publish Date: 25 Aug 2013
  • The generalized Hoek-Brown strength criterion is used widely in rock engineering. The effect of the intermediate principal stress, however, is not taken into account in the Hoek-Brown criterion. The twin-shear models and the generalized Hoek-Brown strength criterion were generalized and combined into a generalized nonlinear unified strength theory. The serial limit surfaces of the generalized nonlinear unified strength theory cover the whole convex region, and encompasses the generalized Hoek-Brown strength criterion and the generalized nonlinear twin shear strength criterion as two special cases. In the stress space, the inner bound of limit surface of the generalized nonlinear unified strength theory is the generalized Hoek-Brown strength criterion, and the outer bound is the generalized twin shear strength criterion. A series of new limit surfaces cover the all region between these two bounds. As a result, the unified yield criterion, the unified strength theory, the rock nonlinear unified strength theory can be linked with the generalized nonlinear unified strength theory.

     

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