Tabulation solution for ductile tearing failure of piping axial flaws was first implemented in the A90 Addendum to the 1989 Edition of the ASME B&PV, Section XI, Appendix H. The solution was based on J-Tearing analyses of pipe axial semi-elliptical part-through wall flaws in a generic ferritic material that has J1C > = 600 in-lbs/in2. Analytical solution for pipe axial flaw has not been implemented in the Code. In this paper a general load multiflier Z-factor is developed for use in an analytical solution for pipe axial part-through wall flaw, which is compatible with the current Elastic-Plastic Fracture Mechanics (EPFM) tabular solution in the Section XI, Appendix C. The Z-curve is developed using the same J-Tearing analysis technique and the same generic material properties for ferritic materials that were used in the development of the Code tabulation solutions. The predicted failure stresses using the Z curve are fairly corelated and conservatively the actual failure stress in the available test specimens from the PIFRAC database.
Effect of Testing Method Type and Specimen Size on Mode I Fracture Toughness of Kimachi Sandstone