Issue 52

S. Budhe et alii, Frattura ed Integrità Strutturale, 52 (2020) 137-147; DOI: 10.3221/IGF-ESIS.52.12 147 o r External radius of pipe (mm) t Pipe thickness (mm) y  Yield stress of pipe (MPa) ult  Ultimate stress of pipe (MPa)   Remaining strength factor L Defect length (mm) w Width of defect section (mm) D External diameter of pipe (mm) d Depth of defect (mm) flow  Flow stress of pipe (MPa) k Material constant th b P Theoretical burst pressure (MPa) , , , t f t M Q A M Bulging factors