›› 2009, Vol. 30 ›› Issue (12): 3607-3614.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Parameter identification of new elastoplastic damage constitutive model for claystone

JIA Shan-po1, 2, CHEN Wei-zhong1, YU Hong-dan1, LI Xiang-ling3   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2.School of Urban Construction, Yangtze University, Jingzhou 434023, China; 3. Euridice, SCK•CEN, Belgian Nuclear Research Centre, Mol 2400, Belgium
  • Received:2009-07-15 Online:2009-12-10 Published:2010-01-18

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Abstract:

In order to depict the hardening and softening behaviours of clay, a new elastoplastic damage model with Mohr-Coulomb criterion is presented in the framework of the irreversible thermodynamics and nonlinear continuum mechanics. Furthermore, damage evolution equation is suggested based on the defined damage potential. Based on the developed numerical code, parameters for Boom clay elastoplastic damage model are obtained according to undrained triaxial consolidation tests by back analysis. The numerical simulation under various stress states shows that the proposed model is able to effectively depict the main features of mechanical behaviors of Boom clay.

Key words: claystone, Mohr-Coulomb criterion, damage, constitutive model, parameter identification

CLC Number: 

  • TU 452
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