Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 3American Society of Mechanical Engineers, 2001 - Arctic regions |
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Page 89
120 Virgin steel 100 ( SM490YB ) 80H ( crack length 60H = 0.05mm ) Ductile crack initiation from specimen 40 Surface Ductile crack initiation 20 from specimen Center 0 0.1 0.2 1 2 ( Smooth ) Radius of notch root , R ( mm ) Fig .
120 Virgin steel 100 ( SM490YB ) 80H ( crack length 60H = 0.05mm ) Ductile crack initiation from specimen 40 Surface Ductile crack initiation 20 from specimen Center 0 0.1 0.2 1 2 ( Smooth ) Radius of notch root , R ( mm ) Fig .
Page 90
Ductile crack ( Observed crack length ) O No ductile crack RO.1 specimen 30 Ductile crack ( Observed crack length ) O No ductile crack 30 RO.2 specimen 25 ( 0.1mm ) ( 0.1mm ) ( 0.08 20 mm ) ( 0.05 ( 0.05mm ) 15 mm ) 25 F ( 0.2mm ) True ...
Ductile crack ( Observed crack length ) O No ductile crack RO.1 specimen 30 Ductile crack ( Observed crack length ) O No ductile crack 30 RO.2 specimen 25 ( 0.1mm ) ( 0.1mm ) ( 0.08 20 mm ) ( 0.05 ( 0.05mm ) 15 mm ) 25 F ( 0.2mm ) True ...
Page 91
12 , critical equivalent plastic strain required to initiate ductile crack depends largely on the stress ... Increasing of the stress triaxiality decreases the critical strain ; the critical curve for ductile cracking in Fig .
12 , critical equivalent plastic strain required to initiate ductile crack depends largely on the stress ... Increasing of the stress triaxiality decreases the critical strain ; the critical curve for ductile cracking in Fig .
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Contents
OMAE2001MAT3010 | 1 |
OMAE2001MAT3011 | 11 |
OMAE2001MAT3013 | 17 |
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analysis applied assessment bending boundary buckling calculated Charpy compared components compressive considered controlled corrosion crack crack initiation critical CTOD curve cycle defects defined deformation derivatives determined developed direction discrete displacement distribution ductile crack dynamic effect element Engineering equation estimated evaluated experiments factors failure fatigue fatigue cracks field Figure flexible force FPSO fracture toughness function geometry grain growth higher impact increase inspection International joints layer length load material maximum measured mechanical metal method microstructure node notch observed obtained offshore operation parameters performed phase pipe pipeline plastic plate predicted present pressure prestrained problem procedure range region respectively riser shown shows simulated specimens standard steel strain strength stress structures surface Table technique temperature tensile thickness weight weld yield