Zencrack is aimed at tackling "real" engineering problems and is based on the use of 3D finite element models. Combining meshing algorithms, either via mesh modification or full remeshing, and a crack growth integration scheme, the program is able to analyse surface and embedded cracks in complex structures and predict growth under fatigue or time dependent loading.

A Zencrack simulation first requires an uncracked 3D finite element mesh of the component or structure of interest. This must be generated by the user with their standard pre-processing tools for the particular finite element package that they use. Zencrack then uses a remeshing or crack-block meshing approach to insert one or more user-specified cracks into the mesh. A cracked mesh is created and submitted to the finite element code for analysis. Results of the finite element analysis are automatically extracted and post-processed to provide stress intensity factor and energy release rate distributions along the crack front(s).