BemLab2D & BemCracker2D: A computational package for modeling and analyzing fracture mechanics problems with boundary elements

Resumo

The stress analysis in structures with complex geometry as in aircraft fuselages, where geometry is
continuously altered by crack growth, usually requires the use of numerical methods, since the presence of
cracks in the structure raises difficulties related to the modeling and, consequently, to the calculation of the stress
intensity factors (SIF). In this aspect, the dual boundary element method (DBEM) has been applied in this type
of analysis, taking advantage over the FEM considered, since there is no need for continuous remeshing at each
crack increment. Therefore, this work introduces a software written in C ++ and based on Object Oriented
Programming, called BemCracker2D, for two-dimensional analysis by DBEM for crack propagation problems in
the field of linear elastic fracture mechanics, as well as its BemLab2D GUI. Parameters as SIF, crack-growth,
number of load cycles and others, will be computed and compared with examples from the open literature in
order to attest to the program's efficiency and robustness.