Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 9, Part 5American Society of Mechanical Engineers, 1990 - Arctic regions |
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Page 27
... ensemble shown using fracture mechanics and the Finite - Element - Method ( FEM ) . Crack ensembles detected by Non - Destructive - Testing ( NDT ) in pipe- walls can be arranged in any number of ways . A step by step fracture mechanics ...
... ensemble shown using fracture mechanics and the Finite - Element - Method ( FEM ) . Crack ensembles detected by Non - Destructive - Testing ( NDT ) in pipe- walls can be arranged in any number of ways . A step by step fracture mechanics ...
Page 28
... ensemble found would be very timeconsuming and costly and there- fore not practically viable . This therefore led to the question wether any given crack ensemble found by means of NDT can be characterized by a crack of simpler geometry ...
... ensemble found would be very timeconsuming and costly and there- fore not practically viable . This therefore led to the question wether any given crack ensemble found by means of NDT can be characterized by a crack of simpler geometry ...
Page 29
... ensemble which was found to be the most critical . In the figures showing the displacement plots of the crack ensembles investigated the left or upper crack tip is always placed closer to the next free surface ( a / b 0.5 ) than the ...
... ensemble which was found to be the most critical . In the figures showing the displacement plots of the crack ensembles investigated the left or upper crack tip is always placed closer to the next free surface ( a / b 0.5 ) than the ...
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addition analysis applied approach assessment assumed bending calculations caused considered CONTINUE corrosion crack damage deformation depth described diameter direction displacement distribution effect energy Engineering ensemble equations factors failure field Figure flow force fracture function given hole included increase initial installation internal layer length limit load material maximum mean measured mechanical method mode movement obtained occurred Offshore operation parameters pipe pipeline plastic plate platform position predicted presented pressure probability problem procedure properties radial range reduced relative reliability resistance response safety scaling scour seabed shown shows simulated soil solution span stability steel strain strength stress structure subsea surface Table term thickness toughness tracers tube uncertainty values valve variables wall wave weight weld