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E-raamat: Fracture and Fatigue of Welded Joints and Structures

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Fracture and Fatigue of Welded Joints and StructuresSuurem pilt
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The failure of any welded joint is at best inconvenient and at worst can lead to catastrophic accidents. Fracture and fatigue of welded joints and structures analyses the processes and causes of fracture and fatigue, focusing on how the failure of welded joints and structures can be predicted and minimised in the design process.

Part one concentrates on analysing fracture of welded joints and structures, with chapters on constraint-based fracture mechanics for predicting joint failure, fracture assessment methods and the use of fracture mechanics in the fatigue analysis of welded joints. In part two, the emphasis shifts to fatigue, and chapters focus on a variety of aspects of fatigue analysis including assessment of local stresses in welded joints, fatigue design rules for welded structures, k-nodes for offshore structures and modelling residual stresses in predicting the service life of structures.

With its distinguished editor and international team of contributors, Fracture and fatigue of welded joints and structures is an essential reference for mechanical, structural and welding engineers, as well as those in the academic sector with a research interest in the field.

Arvustused

"This book is a timely addition to the body of literature on the subject and will be of undoubted value to both researchers and practitioners as a reference of current thinking." --Materials World

Contributor contact details ix
Preface xiii
Introduction 1(16)
K. A. MacDonald
Part I Analysing fracture of welded joints and structures
1 Constraint-based fracture mechanics in predicting the failure of welded joints
17(14)
N. O'Dowd
1.1 Introduction to constraint-based elastic-plastic fracture mechanics
17(1)
1.2 Constraint parameters
18(4)
1.3 Tabulation of Q-solutions
22(3)
1.4 Development of a failure assessment diagram (FAD) approach to incorporate constraint
25(2)
1.5 Effect of weld mismatch on crack tip constraint
27(1)
1.6 Full field (local approach) analysis for fracture assessment
28(1)
1.7 Conclusion
28(1)
1.8 References
28(3)
2 Constraint fracture mechanics: test methods
31(29)
K. A. MacDonald
E. Østby
B. Nyhus
2.1 Introduction
31(1)
2.2 High strains
32(3)
2.3 Two-parameter fracture mechanics
35(1)
2.4 Development of the single edge notch tension (SENT) test
36(15)
2.5 Standardising the single edge notch tension (SENT) test
51(3)
2.6 Conclusions
54(1)
2.7 References
55(2)
2.8 Appendix: Codes and standards
57(1)
2.9 Nomenclature
58(2)
3 Fracture assessment methods for welded structures
60(31)
I. Hadley
3.1 Introduction
60(3)
3.2 Development of engineering critical assessment (ECA) methods
63(1)
3.3 The failure assessment diagram (FAD) concept
64(3)
3.4 Specific engineering critical assessment (ECA) methods: R6
67(5)
3.5 Specific engineering critical assessment (ECA) methods: BS 7910/PD6493
72(9)
3.6 Specific engineering critical assessment (ECA) methods: Structural Integrity Procedures for European Industry (SINTAP)/European Fitness-for-Service Network (FITNET)
81(4)
3.7 Specific engineering critical assessment (ECA) methods: American Petroleum Institute (API)/American Society of Mechanical Engineers (ASME)
85(2)
3.8 Future trends
87(1)
3.9 References
88(3)
4 The use of fracture mechanics in the fatigue analysis of welded joints
91(24)
A. Hobbacher
4.1 Introduction to fracture mechanics
91(2)
4.2 Technical applications of fracture mechanics
93(4)
4.3 Fatigue assessment of welded joints using fracture mechanics
97(10)
4.4 Examples of practical application
107(3)
4.5 Conclusions
110(1)
4.6 References
111(4)
Part II Analysing fatigue of welded joints and structures
5 Fatigue strength assessment of local stresses in welded joints
115(24)
W. Fricke
5.1 Introduction
115(2)
5.2 Types of stress
117(7)
5.3 Factors affecting the fatigue strength
124(5)
5.4 Fatigue strength assessment
129(8)
5.5 Conclusions
137(1)
5.6 References
137(2)
6 Improving weld class systems in assessing the fatigue life of different welded joint designs
139(29)
B. Jonsson
6.1 Introduction
139(1)
6.2 Historic view
140(2)
6.3 Weld class system ISO 5817
142(1)
6.4 Weld class systems at Volvo
143(1)
6.5 A consistent and objective weld class system
144(18)
6.6 Discussion
162(1)
6.7 Conclusions
163(1)
6.8 Future trends
164(2)
6.9 Source of further information and advice
166(1)
6.10 References
166(2)
7 Fatigue design rules for welded structures
168(40)
S. J. Maddox
7.1 Introduction
168(2)
7.2 Key features of welded joints influencing fatigue
170(5)
7.3 Fatigue crack propagation
175(2)
7.4 Design rules
177(12)
7.5 Future developments in the application of fatigue rules
189(13)
7.6 Conclusions
202(1)
7.7 References
203(3)
7.8 Appendix: fatigue design codes and standards
206(2)
8 Fatigue assessment methods for variable amplitude loading of welded structures
208(31)
G. B. Marquis
8.1 Introduction
208(6)
8.2 Fatigue damage and assessment for variable amplitude loading
214(12)
8.3 Variable amplitude fatigue testing
226(7)
8.4 Future trends
233(1)
8.5 Sources of further information and advice
234(1)
8.6 References and further reading
235(4)
9 Reliability apects in fatigue design of welded structures using selected local approaches: the example of K-nodes for offshore constructions
239(37)
C. M. Sonsino
9.1 Introduction
239(1)
9.2 Selected decisive design parameters
239(22)
9.3 Selected design concepts by the example of K-nodes
261(12)
9.4 Conclusions
273(1)
9.5 References
274(2)
10 Assessing residual stresses in predicting the service life of welded structures
276(21)
M. N. James
D. G. Hattingh
W. H. Rall
South Africa
A. Steuwer
10.1 Introduction
276(2)
10.2 Origins and types of stress
278(5)
10.3 Modification of stresses after welding
283(2)
10.4 Measurement
285(7)
10.5 Conclusions
292(1)
10.6 Acknowledgements
293(1)
10.7 References
293(4)
11 Fatigue strength improvement methods
297(34)
P. J. Haagensen
11.1 Introduction
297(1)
11.2 Fatigue strength of welded joints
298(3)
11.3 Increasing the fatigue strength by improved design
301(4)
11.4 Improvements obtained by special plate, filler materials and welding methods
305(2)
11.5 Special welding methods
307(1)
11.6 Post-weld improvement methods
307(17)
11.7 Future trends
324(3)
11.8 Conclusions
327(1)
11.9 References and further reading
327(4)
Index 331
Kenneth Macdonald is Professor in the Department of Mechanical and Structural Engineering and Materials Science at the University of Stavanger, Norway.
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