Volume 4, Number 3 (September 2006)                   IJCE 2006, 4(3): 176-191 | Back to browse issues page


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Khoei A, Yadegari S, Anahid M. Three-dimensional modeling of strain localization in Cosserat continuum theory. IJCE. 2006; 4 (3) :176-191
URL: http://ijce.iust.ac.ir/article-1-341-en.html

Abstract:   (6438 Views)
In this paper, a higher order continuum model is presented based on the Cosserat continuum theory in 3D numerical simulation of shear band localization. As the classical continuum models suffer from the pathological mesh-dependence in strain softening models, the governing equations are regularized by adding the rotational degrees-of-freedom to conventional degrees-of-freedom. The fundamental relations in three-dimensional Cosserat continuum are presented and the internal length parameters are introduced in the elasto-plastic constitutive matrix to control the shear bandwidth. Finally, the efficiency of proposed model and computational algorithm is demonstrated by a 3D strip in tensile. A comparison is performed between the classical and Cosserat theories and the effect of internal length parameter is demonstrated. Clearly, a finite shear bandwidth is achieved and the load-displacement curves are uniformly converged upon different mesh sizes.
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Type of Study: Research Paper |

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