BEMCRACKER2D: A SOFTWARE PACKAGE FOR TWO-DIMENSIONAL FATIGUE CRACK GROWTH ANALYSIS

Resumo

The stress analysis in structures with complex geometry, such 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. In this context, this work proposes the development of software written

in C ++ and based on Object Oriented Programming, called BemCracker2D, for two-
dimensional analysis by DBEM of fatigue crack propagation problems in the field of linear

elastic fracture mechanics. Parameters such as SIF, crack propagation path, 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.