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Fatigue Life Analyses of Welded Structures


Tom Lassen, Agder University College, Grimstad, Norway Naman Recho, University Blaise Pascal, Clermont Ferrand, France

ISBN: 9781905209545

Publication Date: October 2006   Hardback   432 pp.

215.00 USD

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Avoiding or controlling fatigue damage is a major issue in the design and inspection of welded structures subjected to dynamic loading. Life predictions are usually used for safe life analysis, i.e. for verifying that it is very unlikely that fatigue damage will occur during the target service life of a structure. Damage tolerance analysis is used for predicting the behavior of a fatigue crack and for planning of in-service scheduled inspections. It should be a high probability that any cracks appearing are detected and repaired before they become critical. In both safe life analysis and the damage tolerance analysis there may be large uncertainties involved that have to be treated in a logical and consistent manner by stochastic modeling. This book focuses on fatigue life predictions and damage tolerance analysis of welded joints and is divided into three parts. The first part outlines the common practice used for safe life and damage tolerance analysis with reference to rules and regulations. The second part emphasises stochastic modeling and decision-making under uncertainty, while the final part is devoted to recent advances within fatigue research on welded joints. Industrial examples that are included are mainly dealing with offshore steel structures. Spreadsheets which accompany the book give the reader the possibility for hands-on experience of fatigue life predictions, crack growth analysis and inspection planning. As such, these different areas will be of use to engineers and researchers.


1. Introduction
2. Basic characterization of the fatigue behaviour of welded joints.
3. Experimental methods and data analysis.
4. How to describe fatigue loading.
5. Elaborating the S-N approach with reference to rules and regulations.
6. Favorable configuration and improvement methods for welded joints.
7. Applied Fracture mechanics.
8. Reliability methods.
9. Engineering critical assessment and damage tolerance.
10. A two-phase model for the fatigue life prediction of welded joints

About the Authors

Tom Lassen is from Agder University College in Grimstad, Norway. He also teaches aircraft maintenance for the Norwegian Royal Air Force and has recently been a visiting Professor at University Blaise Pascal, Clermont-Ferrand, France.
Naman Recho is a Professor at the University Blaise Pascal in Clermont Ferrand, France. He has worked extensively with conceptual and applied aspects of fracture mechanics, with welded offshore structures and reliability analysis of cracked structures. He also teaches at Centre des Hautes Etudes de la Construction, Paris, and is guest Professor at Hefei University of Technology in China.


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