Second European Conference on Computational Mechanics (ECCM)
Cracow, Poland, 26-29 June 2001
MODELS FOR QUASIBRITTLE FAILURE:
THEORETICAL AND COMPUTATIONAL ASPECTS
Milan Jirásek and Borek
This paper deals with various aspects of the computational analysis of
strain localization and failure in quasibrittle materials. It gives a general
overview of three main classes of modeling approaches:
For the second class of models, the effect of mesh-induced directional
bias is demonstrated and the importance of crack-induced anisotropy and
of a clean resolution of a stress-free crack is discussed. For the third
class of models, a mesh-adaptive technique based on an error indicator
combined with a simple error estimator is briefly described and illustrated
by an example. As an alternative to the usual h-refinement, an extended
finite element method (X-FEM) is outlined.
models with propagating cohesive displacement discontinuities;
softening continuum models with partial regularization by the fracture
energy approach; and
fully regularized softening continuum models.
The full paper can be downloaded in PostScript
format or in PDF format.
EPFL / 15 June 2001 / email@example.com