Consistent boundary element method for crack propagation problems

Resumo

This paper presents the development of a crack propagation code to be implemented in a computer
program based on the consistent boundary element method. This method has as its main characteristic an exact
resolution of singularity problems inherent to the formulation. Furthermore, with this method, it is possible to
represent the crack geometry of the models with openings in the micrometer range, similar to the cracks presented
in laboratory tests. In this study, two models with different geometries are analyzed, using the same load, in order
to represent pure mode I and mixed mode (modes I and II) loading configurations. The performance of this method
is compared with the results of other papers found in the literature. As a crack propagation criterion, the maximum
stress in the proximity of the crack tip and the stress intensity factor obtained through the crack tip opening
displacement are analyzed. A study was also carried out on the propagation angle and crack stability, aiming at
improving the accuracy of the model results and reducing the computational cost of the simulations. The study
presented in this article is a work in progress.