Select Fracture Mechanics Approach

This dropdown has three options:

(1)        API 579-1/ASME FFS-1 Crack Stability

API 579-1/ASME FFS-1, Part 9, Level 2 Assessment is the basis for the general calculation approach. The calculation performs a failure assessment diagram (FAD) stability analysis and does not consider crack growth due to load cycling.

(2)        ASME VIII, Div 3, Article KD-4, Crack Growth

ASME BPVC 2007 Section VIII – Div 3 [2], Article KD-4 and Appendix D is the basis for the general calculation approach. The simulation performs both the FAD assessment and crack growth due to load cycling until failure and uses the mean stress correction factor, f(RK):

       da/dn = C [f(RK)] ΔKm

(3)        API 579-1/ASME FFS-1 Crack Growth

API 579-1/ASME FFS-1, Part 9, Level 2 Assessment is the basis for the general calculation approach. The simulation performs both the FAD assessment and crack growth due to load cycling until failure.

       da/dn = C ΔKm