Stress Integration of the Hoek-Brown Material Model Using Incremental Plasticity Theory |
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| Authors: | Dragan Rakic Miroslav Zivkovic Vladimir Milovanovic |
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| Affiliation: | University of Kragujevac, Faculti of Engineering, Sestre Janjic 6, 34000 Kragujevac, Serbia |
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| Abstract: | This paper presents the formulation of the stress integration procedure for the Hoek-Brown (HB) material model with non-associative yielding condition by using the incremental plasticity method. Main idea of this method is to reach the solution by calculating the plastic matrix according to the method of incremental plasticity (used for elastic constitutive matrix corrections), and with the use of the total strain increment. Computational procedure is implemented within the PAK program package. Results of this procedure were compared with the solutions obtained by other program that contains this material model. (© 2013 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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