›› 2007, Vol. 28 ›› Issue (5): 865-870.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

An elastoplastic damage model for geomaterials and analysis of strain localizaion of arch dams

CHEN Xin1, YANG Qiang2, ZHOU Wei-yuan2   

  1. 1. School of Mechanics & Civil Engineering, China University of Mining &Technology ( Beijing), Beijing 100083, China; 2. Department of Hydraulic and Hydropower Engineering, Tsinghua University, Beijing 100084, China
  • Received:2005-12-20 Online:2007-05-10 Published:2013-09-10

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Abstract: Elastoplastic models can’t simulate strain localization due to ductile damage evolution. A porous geomaterial is modeled as an aggregate of spherical thick-walled shells, so the damage of a representative volume element can be characterized by a scalar variable, i.e. the void volume fraction, and a coupled plastic damage model for geomaterials based on micromechanics was proposed. This model was implemented into the commercial FEM software MARC through a user subroutine, and strain localization of geomaterials was studied. Shear band formation due to void nucleation and growth were successfully simulated in a specimen of geomaterial under plane stress compression and tension by the model respectively. Shear band formation in an arch dam under overloading was studied also. It is shown that the strain localization appeared first at the heel of the arch dam.

Key words: geomaterials, void volume fraction, damage coupled plastic model, arch dam, strain localization

CLC Number: 

  • TU 452
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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