Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 13, Parts 3-5American Society of Mechanical Engineers, 1994 - Arctic regions |
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Page 74
Since the fatigue data are obtained on test pieces , the information may not exactly apply to an actual structure being considered . some studies have revealed that “ intrusions " and “ extrusion ” precede fatigue crack initiation .
Since the fatigue data are obtained on test pieces , the information may not exactly apply to an actual structure being considered . some studies have revealed that “ intrusions " and “ extrusion ” precede fatigue crack initiation .
Page 156
The fracture surface observation of the notched round - bar specimens which failed in the corrosion fatigue life test in the sour crude oil much shorter than in air , revealed that the fatigue crack initiated at the notch .
The fracture surface observation of the notched round - bar specimens which failed in the corrosion fatigue life test in the sour crude oil much shorter than in air , revealed that the fatigue crack initiated at the notch .
Page 158
Stage 2 : The crack opening increases with associating with fatigue crack propagation , causing the corrosion product itself to crack . Consequently sour crude oil gradually reaches the newly formed fatigue crack tip , allowing da / dN ...
Stage 2 : The crack opening increases with associating with fatigue crack propagation , causing the corrosion product itself to crack . Consequently sour crude oil gradually reaches the newly formed fatigue crack tip , allowing da / dN ...
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Contents
FATIGUE AND DEFORMATION | 1 |
Determination of Recovery Length in Spiral Strands | 9 |
FRACTURE ASSESSMENT AND ANALYSIS | 37 |
Copyright | |
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analysis applied assessment bending calculated compared composition constant corrosion crack growth CTOD curve cycles deformation dependence deposit depth determined developed distribution effect elastic electrode Engineering environment equation experimental factor failure fatigue crack ferrite Figure finite element fracture geometry given grain heat higher hydrogen increase indicate initial International joints length limit load lower material mean measured Mechanics method microstructure nitrogen notch observed obtained occur Offshore operating oxygen parameters performed phase pipe plastic plate predictions present pressure problems procedure produced propagation properties protection range ratio reduced region Research residual respectively sea water shown shows simulated specimens standard steel strain strength stress structures surface Table temperature tensile thickness toughness tubular joints values weld metal wire yield