Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 14, Part 3American Society of Mechanical Engineers, 1995 - Arctic regions |
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Page 280
... Notch a = B Laser Welds TABLE 2 THREE - POINT BEND SPECIMENS USED IN EXPERIMENTS e- Item Fracture toughness B = 2.5 , 5 mm em Dimension BxW Distance е ( mm ) Symbol Ка ( MN / 3 / 2 ) & r ( mm ) 8/820 WL es -S = 4W- FIG . 1 CONFIGURATION ...
... Notch a = B Laser Welds TABLE 2 THREE - POINT BEND SPECIMENS USED IN EXPERIMENTS e- Item Fracture toughness B = 2.5 , 5 mm em Dimension BxW Distance е ( mm ) Symbol Ка ( MN / 3 / 2 ) & r ( mm ) 8/820 WL es -S = 4W- FIG . 1 CONFIGURATION ...
Page 283
... Notch Z X ם / 8 = 0.03 mm 400 Opening stress , σ ( MPa ) yy 1200 -e = = 0.2 S --- e 0.6 S = Ae 1.2 = S Homogeneous specimen 800 Notch X 400 Z at mid - thickness 8 = 0.03 mm at mid - thickness " b 0 0 0.4 0.8 1.2 1.6 Distance from crack ...
... Notch Z X ם / 8 = 0.03 mm 400 Opening stress , σ ( MPa ) yy 1200 -e = = 0.2 S --- e 0.6 S = Ae 1.2 = S Homogeneous specimen 800 Notch X 400 Z at mid - thickness 8 = 0.03 mm at mid - thickness " b 0 0 0.4 0.8 1.2 1.6 Distance from crack ...
Page 583
... notch root . According to this approach the fatigue effective notch factor K is identical to the geometrical notch factor K1 at a notch modified with respect to the microstructural support of the surrounding material . For structural ...
... notch root . According to this approach the fatigue effective notch factor K is identical to the geometrical notch factor K1 at a notch modified with respect to the microstructural support of the surrounding material . For structural ...
Contents
FATIGUE GUIDANCE FOR OFFSHORE STRUCTURES | 1 |
VOLUME IA OFFSHORE TECHNOLOGY VOLUME IIIMATERIALS ENGINEERING | 18 |
STRUCTURAL INTEGRITY METHODS FOR WELDED COMPONENTS | 55 |
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analysis applied assessment axial behaviour bending brace calculated cathodic protection Charpy chord crack depth crack growth rate crack initiation crack propagation crack tip CTOD cycles defect deformation developed ductility effect Efthymiou equations evaluation experimental failure fatigue crack growth fatigue guidance fatigue lives fatigue strength fatigue tests Figure finite element finite element analysis fracture mechanics fracture toughness GCHAZ geometry hammer peening high strength steels hydrogen increase Laser welds load material measured method microstructure mismatch mixed mode multiplanar normalised notch obtained offshore structures parameters parametric equations parent plate peening pipe plate thickness predictions procedure ratio region repair residual stress ring-stiffened joints S-N curve sea water seawater shielding gas shown in Fig strain stress concentration stress concentration factor stress intensity factor stress range surface cracks Table tensile TMCP tubular joints tested undermatched values weld metal weld toe welded joints weldment yield strength