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E-raamat: Fatigue and Fracture Mechanics of Offshore Structures [Wiley Online]

(University College London, UK)
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Fatigue and Fracture Mechanics of Offshore StructuresSuurem pilt
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Raamatu kodulehekülg: https://onlinelibrary.wiley.com/doi/book/10.1002/9781118903018
Etube (mechanical engineering, University College London) presents novel research and the results of wave-induced stress on the operational life of offshore structures. Using the results of an investigation undertaken to assess the fatigue and fracture performance of steels used in the industry, the five chapters discuss details of the methodology to develop a typical jack-up offshore standard load history (JOSH); factors that influence fatigue resistance of structural steels used in the construction of jack-up structures; methods used to model the relevant factors for inclusion in JOSH, with emphasis on loading and structural response interaction; results and details of experimental variable amplitude corrosion fatigue tests conducted using JOSH; and a novel generalized methodology for fast assessment of offshore structural welded joints. Distributed by ASME. Annotation c. Book News, Inc., Portland, OR (booknews.com)

The tubular welded joints used in the construction of offshore structures can experience millions of variable amplitude load cycles during their service life. Such fatigue loading represents a main cause of degradation in these structures. As a result, fatigue is an important consideration in their design. Fatigue and Fracture Mechanisms of Offshore Structures present novel research and the results of wave-induced stress on the operational life of offshore structures.

Containing results of an investigation undertaken to assess the fatigue and fracture performance of steels used in the offshore industry, Fatigue and Fracture Mechanics of Offshore Structures includes,

  • Stress analysis of tubular joints
  • Fatigue design
  • Fatigue loading in Jackup structures
  • Jack-up dynamic response
  • Modelling of wave loading
  • Test specimen considerations
  • The stress intensity factor concept
  • Variable amplitude crack growth models
  • Consideration of sequence effects
  • Sea state probability model

The important research in this book will be of interest to those dealing with a wide range of engineering structures - from bridges and buildings to masts and pipelines, as well as fatigue and fracture specialists, and those concerned with materials technology.

Series Editor's Foreword xiii
Foreword xv
Acknowledgements xvii
Notation xxi
Literature Review
Introduction and background
1(3)
Review
4(1)
Stress analysis of tubular joints
5(11)
Definition of stresses in welded connections
5(1)
Definition of hot spot stress
6(3)
Methods of stress analysis
9(7)
Fatigue design
16(24)
S-N approach
16(20)
The Fracture Mechanics (FM) approach
36(4)
Summary
40(3)
Service Load Simulation
Introduction
43(1)
Fatigue loading in Jack-up structures
44(3)
Review of previous loading models
47(2)
COLOS/C 12-20 series
48(1)
UKOSRP II double-peaked spectrum
48(1)
Hart/Wischung algorithm
48(1)
WASH sequence
49(1)
The JOSH model
49(1)
Generation of JOSH
49(3)
The pseudo random binary sequence technique
50(1)
The Morkov chain technique
50(2)
Jack-up dynamic response
52(8)
The transfer function approach
52(3)
Modelling of structural parameters
55(2)
Modelling of soil-structure interaction
57(3)
Modelling of wave loading
60(2)
Selection of sea states
62(2)
Discussion
64(12)
Summary
76(1)
Large-scale Fatigue Testing
Introduction
77(1)
Test specimen consideration
78(4)
Properties of SE 702
78(2)
Consideration of test specimen geometry
80(2)
Fabrication of SE 702 specimens
82(1)
Experimental set-up
82(2)
Details of test rig
82(1)
Test control and data acquisition
82(1)
Simulation of environmental conditions
83(1)
Stress analysis of Y joints
84(3)
Experimental stress analysis procedure
84(1)
Use of parametric equations
85(2)
Experimental fatigue testing
87(4)
Test parameters and the JOSH sequence
87(4)
Fatigue test results
91(7)
Fatigue crack initiation
91(3)
Crack growth curves
94(2)
Crack aspect ratio evolution
96(2)
S-N data
98(1)
Discussion
98(5)
Summary
103(2)
Fracture Mechanics Analysis
Introduction
105(1)
The stress intensity factor concept
106(2)
Experimental results
108(6)
Use of empirical SIF solutions
114(3)
The average stress model
114(1)
The two-phase model (TPM)
115(1)
The modified average stress model
116(1)
Adapted plate solutions
117(5)
Newman-Raju SIF solution for surface cracks
118(4)
New semi-empirical Y factor solution
122(5)
Variable amplitude crack growth models
127(3)
Equivalent stress range approach
127(1)
Equivalent crack growth concept
128(2)
Consideration of sequence effects
130(2)
Fast assessment of offshore structures
132(4)
New normalized PSD equation
134(2)
Sea state probability model
136(4)
Use of sea state probability distribution model
138(1)
Formulation of the sea state equivalent stress concept
139(1)
Discussion
140(7)
Summary
147(2)
Conclusion
Summary
149(1)
Conclusions and recommendations
149(4)
References 153(8)
Index 161


Linus Etube is the author of Fatigue and Fracture Mechanics of Offshore Structures, published by Wiley.
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