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http://dx.doi.org/10.7843/kgs.2006.22.2.41

Microplane Constitutive Model for Granite and Analysis of Its Behavior  

Zi Goangseup (Korea Univ.)
Moon Sang-Mo (Korea Univ.)
Lee In-Mo (Korea Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.22, no.2, 2006 , pp. 41-53 More about this Journal
Abstract
The brittle materials like rocks show complicated strain-softening behavior after the peak which is hard to model using the classical constitutive models based on the relation between strain and stress tensors. A kinematically constrained three-dimensional microplane constitutive model is developed for granite. The model is verified by fitting the experimented data of Westerly granite and Bonnet granite. The triaxial behavior of granite is well reproduced by the model as well as the uniaxial behavior. We studied the development of the fracture zone in granite during blasting impact using the model with the standard finite element method. All the results obtained from the microplane model developed are compared to those from the linear elasticity model which is commonly used in many researches and practices. It is found that the nonlinearity of rocks sigificantly affects the results of analysis.
Keywords
Blasting; Fractured zone; Material modelling; Microplane model; Plasticity;
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