of Quasi-Brittle Failure

** Daniel Rypl, Borek Patzák, Zdenek Bittnar
Department of Structural Mechanics
Faculty of Civil Engineering
Czech Technical University in Prague
Thákurova 7, 166 29 Prague, Czech Republic**

This paper deals with the analysis of quasi-brittle materials
characterized by large nonlinear fracture process zones and highly
localized damage. The adopted scalar damage material model is
regularized using the nonlocal continuum concept. To assess the
distribution of the solution error a residual-based error estimator is
employed. This is then integrated with other components as refinement
strategy and mapping algorithm into an adaptive framework.
To reduce high computational demands of the analysis
and especially of the error estimation, the whole process is
parallelized using the domain decomposition concept.
The capability of the proposed scheme is illustrated on an example.
Finally the merits of the adopted approach are highlighted and
remedies to alleviate its drawbacks are suggested.

- Introduction
- Model Regularization
- Error Estimation
- Refinement Strategy
- Parallelization Concept
- Adaptive Analysis
- Implementation
- Examples
- Conclusions
- Acknowledgments
- Bibliography
- Figures

*Daniel Rypl
2005-12-03*