广义塑性力学多重屈服面模型隐式积分算法及其ABAQUS二次开发

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Abstract An implicit integration algorithm of constitutive equations for multi-yield-surface model with non- associative flow rule is presented firstly. The yield criterions of multi-yield-surface model are gotten by fitting the experimental data through conventional triaxial tests and true triaxial tests based on generalized plasticity. The UMAT subroutine of this model is developed in ABAQUS with the FORTRAN language through the implicit algorithm. It is easy to verify the feasibility and accuracy of the model and the program by comparing the results of numerical simulation with that given by triaxial tests.

Key words： soil mechanics generalized plasticity multi-yield-surface model non-associative flow rule implicit stress integration algorithm

Received: 18 May 2011

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http://www.rockmech.org/EN/Y2011/V30/I10/2019

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