Main Help → All Commands → Explicit Cracks in FEA
Crack in FEA calculations are set up by configuring the mesh to include a crack. A crack can be internal to the mesh or, for symmetric loading, can be on an edge of the mesh and defined with the help of boundary conditions. These two crack geometries are illustrated here:
The crack plane edges must be collinear and of equal length (Δa). When a calculation with cracks is done, the Crack Closure... command can be used to calculate crack tip energy release rate. For more details see the OSUPDocs wiki.
The one command to alter crack tip geometry is