Application of new nonlinear strengh criterion to rock materials
Abstract：Based on the twin shear strength theory of rock,considering the interval properties of the effect of intermodiate principal stress on rock strength and the degree of the effect releated to minimum principal stress,a improvement formula of the twin shear strength criterion was presented.The new nonlinear criterion for rocks was verified by triaxial compression test data of different rocks that were published.The result shows that the new nolinear criterion for rocks can be widely applied to kinds of rocks and can describe the charactreistics of nonlinear strength in the media plane and σ1-σ2 plane.Compared with the nonlinear unified strength criterion and strengh criterion of deep rock mass using test results of five different rock types under the three dimensional stress states,the advantages of the new nonlinear strengh criterion are emboidied.
Keywords：nonlinear materialsrock materialsintermodiate principal stresstrue triaxial test data
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)