Abaqus Fracture Analysis of an Infinite Array of Collinear Cracks

In this Abaqus tutorial, the Energy Release Rate of an Infinite Array of Collinear Cracks is computed using the J-Integral.
Due to the symmetry of this example, the model can be reduced to an Edge Cracked Plate with symmetry boundary conditions in the x- and y- axes.
Quarter-point collapsed elements are used in the vicinity of the crack tip in order to reproduce the 1/sqrt(r) stress singularity at the tip.
The J-integral results are then exported to a text file for each of the requested integration contours.