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Computers and Concrete
  Volume 1, Number 4, November 2004, pages 433-455
DOI: http://dx.doi.org/10.12989/cac.2004.1.4.433
 


Numerical simulations of localization of deformation in quasi-brittle materials within non-local softening plasticity
J. Bobinski and J. Tejchman

 
Abstract     [Full Text]
    The paper presents results of FE-calculations on shear localizations in quasi-brittle materials during both an uniaxial plane strain compression and uniaxial plane strain extension. An elasto-plastic model with a linear Drucker-Prager type criterion using isotropic hardening and softening and non-associated flow rule was used. A non-local extension was applied in a softening regime to capture realistically shear localization and to obtain a well-posed boundary value problem. A characteristic length was incorporated via a weighting function. Attention was focused on the effect of mesh size, mesh alignment, non-local parameter and imperfections on the thickness and inclination of shear localization. Different methods to calculate plastic strain rates were carefully discussed.
 
Key Words
    brittle material; compression; extension; material softening; non-locality; plasticity; shear localization.
 
Address
Civil Engineering Department, Gdansk University of Technology, 80-952 Gdansk,rnNarutowicza 11/12, Poland
 

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