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New weld toe magnification factors for semi‐elliptical cracks in plate‐to‐plate butt‐welded joints
Author(s) -
Lie S. T.,
Zhao H. S.,
Vipin S. P.
Publication year - 2017
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12485
Subject(s) - welding , butt joint , magnification , butt welding , bending , materials science , finite element method , structural engineering , composite material , metallurgy , engineering , optics , physics
British Standard 7910:2013 includes a single set of equations for estimating the weld toe magnification factor ( M k ) of different types of welded joints with a semi‐elliptical surface crack. In this study, extensive finite element analyses are performed to determine the M k of plate‐to‐plate butt‐welded joints subjected to axial and bending loading. The M k values at the crack deepest points and the crack ends are determined. It is found that the M k results of butt welds are different with those of single T‐butt joints with percentage difference in values being as high as 63.8% and 97.4% for axial and bending loading cases, respectively. Percentage differences of 60.4% and 358.2% for axial and bending loading cases are observed between butt welds and X‐joints. New M k equations for butt welds are proposed using multiple regression analyses.