2Fatiguestrengthassessment.............................................................68
3Componentstochasticanalysis..........................................................68
4Fullstochasticanalysis......................................................................72
Section6Finiteelementanalysis..........................................................................75
1Introduction.......................................................................................75
2Finiteelementmodelling................................................................... 80
3Derivationofhotspotstress............................................................. 83
4Procedureforanalysisofstandarddetails.........................................86
5Procedureforanalysisofhotspotstressofweb-stiffened
cruciformjoints.................................................................................... 87
6Procedureforanalysisofhotspotstressofsimplecruciform
joints.................................................................................................... 92
Section7Improvementoffatiguelifebyfabrication............................................94
1Introduction.......................................................................................94
2Grinding............................................................................................. 94
Section8Detaildesignstandard.......................................................................... 98
1Introduction.......................................................................................98
2Detaildesignstandardforlongitudinalendconnectionswithout
topstiffener..........................................................................................98
3Detaildesignstandardfordifferentshiptypes................................103
Section9References...........................................................................................104
1References....................................................................................... 104
AppendixAStressconcentrationfactorsandFATclasses...................................106
1General............................................................................................ 106
2Longitudinalendconnections.......................................................... 107
3Buttwelds....................................................................................... 122
4Flangeconnections.......................................................................... 125
5Weldedattachments........................................................................ 129
6Simplecruciformjoints....................................................................133
7Scallopsandblockjoints................................................................. 135
8Lowerhopperknuckles....................................................................137
9Pipeconnections..............................................................................138
10Holeswithedgereinforcements.................................................... 139
11Roundedrectangular,ellipticalandovalholes...............................160
AppendixBFatiguecapacity............................................................................... 165
1FailurecriterioninherentintheS-Ncurves.....................................165
Contents
Classguideline—DNV-CG-0129.EditionOctober2021 Page5
Fatigueassessmentofshipstructures
DNVAS