J-integral and tearing modulus analyses are developed for full circumference part-through cracks in pipes under torsion. The approach is based on the psuedo-potential energy interpretation of the J-integral. The paper develops estimation formula for the plastic component of the J-integral for the condition of net-section yielding in the cracked section of the pipe. The applied tearing modulus estimates are derived for deformation-controlled loading. Numerical results are presented for crack initiation and tearing instability that provide quantitative results for inferring safety of cracked nuclear piping.

This content is only available via PDF.
You do not currently have access to this content.