Elastic-plastic-brittle constitutive model of rocks and its numerical validation
Abstract：In order to accurately predict the broken time and crack-growth in rock,based on non-uniform characteristics of rock material,a particular elastic-plastic-brittle constitutive model,considering the heterogeneity of rock and the features of deep engineering,was presented,and the corresponding finite element program was written and modularized.Through the simulation of two tests,including the tension test of pre-existing crack board and the compression test of rock samples,it is shown that the present model is rational and accurate,which can more accurately simulate crack growth and the development mode of localized shear band.In the strain-hardening stage of new constitutive model,stress concentration and unit yield happen before the failure of rock,especially tension failure and shear failure after the unit yield can be distinguished.
Keywords：elastic-plastic-brittleconstitutive modelrock mass failurestrain-hardening
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 585-589 )