This item is in: Engineering > Fatigue, fracture and failure > Preventing fatigue and failure
Fatigue strength of welded structures (Second edition)S J Maddox, TWI Ltd, UK
Woodhead Publishing Series in Welding and Other Joining Technologies No. 7
The key to avoidance of fatigue, which is the main cause of service failures, is good design. In the case of welded joints, which are particularly susceptible to fatigue, design rules are available. However, their effective use requires a good understanding of fatigue and an appreciation of problems concerned with their practical application. Fatigue strength of welded structures has incorporates up-to-date design rules with high academic standards whilst still achieving a practical approach to the subject. The book presents design recommendations which are based largely on those contained in recent British standards and explains how they are applied in practice. Attention is also focused on the relevant aspects of fatigue in welded joints which are not yet incorporated in codes thus providing a comprehensive aid for engineers concerned with the design or assessment of welded components or structures. Background information is given on the fatigue lives of welded joints which will enable the engineer or student to appreciate why there is such a contrast between welded and unwelded parts, why some welded joints perform better than others and how joints can be selected to optimise fatigue performance.
ISBN 1 85573 013 8
ISBN-13: 978 1 85573 013 7
January 1991
208 pages 234 x 156mm hardback
£145.00 / US$245.00 / €175.00
Usually dispatched within 24 hours
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Contents
PART 1 WELDED JOINTS UNDER FATIGUE LOADING
PART 2 DESIGN RULES
PART 1 WELDED JOINTS UNDER FATIGUE LOADING
Fatigue failure
- Fatigue loading
- Fatigue test data
- Stress concentrations
Significant features of welds in relation to fatigue
- Stress concentrations cased by weld shape
- Stress concentrations cased by discontinuities
- Residual stress
- Practical implications
Factors which affect fatigue of welded joints
- Stress relief
- Material properties
- Weld quality
- Size effects
Fatigue of welded joints
- Transverse butt welds
- Longitudinal butt welds
- Fillet welded connections
- Welded structures
Conclusions
PART 2 DESIGN RULES
Fatigue design rules for welded steel joints
- Basis of rules
- Joint classification
- Unclassified joints
- Design S-N curves
- Effect of welded joint dimensions
Stresses used with the fatigue design rules
- Nominal stress
- Combined stress
- Welds in regions of stress concentration
Practical application of the rules
- General design procedure
- Joints subjected to constant range loading
- Random loading and cumulative damage
- Design of transverse load-carrying fillet welds
- Stress-relieved joints
- High strength and special steels
- Welded joints of aluminium alloys
- Effect of environment
Significance of weld imperfections
- ECA Procedures for weld imperfections
- Quality categories
- Shape imperfections
- Planar flaws
Improving the fatigue strength of welded joints
- Reducing stress concentration effects
- Introduction of comprehensive residual stresses
- High strength steels
Typical service failures
Conclusions