J integral for throughwall circumferential crack - abaqus

Hi All!

I am a beginner in the field of abaqus. I am trying to obtain J integral for throughwall circumferentially cracked pipes. I found these images from fracture lectures of abaqus training slides. I wanted to know what is the partitioning stragegy in abaqus, to create the partition for the contours.

I am using EPFM, Ramberg Osgood model, subejcting the pipes to bending moments.

Thanks in Advance!!