Fatigue Analysis of Welded Components ：Designer’s Guide to the Structural Hot-Spot Stress Approach ( Woodhead Publishing Series in Welding and Other Joining Technologies )

Publication subTitle ：Designer’s Guide to the Structural Hot-Spot Stress Approach

Publication series ：Woodhead Publishing Series in Welding and Other Joining Technologies

Author： Niemi E.;Fricke W;Maddox S J

Publisher： Elsevier Science‎

Publication year： 2006

E-ISBN: 9781845696665

P-ISBN(Paperback): 9781845691240

P-ISBN(Hardback): 9781845691240

Subject： TG405 Durability problems

Language： ENG

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Description

This report provides background and guidance on the use of the structural hot spot stress approach to the fatigue design of welded components and structures. It complements the IIW recommendations for 'Fatigue Design of Welded Joints and Components' and extends the information provided in the IIW recommendations on 'Stress Determination for Fatigue Analysis of Welded Components'. This approach is applicable to cases of potential fatigue cracking from the weld toe. It has been in use for many years in the context of tubular joints. The present report concentrates on its extension to structures fabricated from plates and non-tubular sections.

Following an explanation of the structural hot spot stress, its definition and its relevance to fatigue, the authors describe methods for its determination. Stress determination from both finite element analysis and strain gauge measurements is considered. Parametric formulae for calculating stress increases due to misalignment and structural discontinuities are also presented. Special attention is paid to the use of finite element stress analysis and guidance is given on the choice of element type and size for use with either solid or shell elements. Design S-N curves for use with the structural hot spot stress are presented for a range of weld details. Finally, practical application of the recommendations is illustrated in two case studies involving the fatigue assessment of welded structures using the structural hot spot stress a

Chapter

Cover

pp.： 1 – 2

Fatigue Analysis of Welded Components: Designer’s guide to the structural hot-spot stress approach (IIW-1430-00)

pp.： 2 – 3

pp.： 3 – 4

CONTENTS

pp.： 4 – 6

PREFACE

pp.： 6 – 8

ABSTRACT

pp.： 8 – 10

1. INTRODUCTION

pp.： 10 – 11

2. THE STRUCTURAL HOT SPOT STRESS APPROACH TO FATIGUE ANALYSIS

pp.： 11 – 18

3. EXPERIMENTAL DETERMINATION OF THE STRUCTURAL HOT SPOT STRESS

pp.： 18 – 21

4. STRUCTURAL HOT SPOT STRESS DETERMINATION USING FINITE ELEMENT ANALYSIS

pp.： 21 – 29

5. PARAMETRIC FORMULAE

pp.： 29 – 33

6. STRUCTURAL HOT SPOT S-N CURVES

pp.： 33 – 36

7. CASE STUDY 1: BOX BEAM OF A RAILWAY WAGON

pp.： 36 – 43

8. CASE STUDY 2: HATCH CORNER DESIGN FOR CONTAINER SHIPS

pp.： 43 – 47

9. REFERENCES

pp.： 47 – 48

APPENDIX 1: SYMBOLS

pp.： 48 – 51

APPENDIX 2: RECOMMENDATIONS FOR ENHANCED ACCURACY IN STRESS DETERMINATION

pp.： 51 – 53

APPENDIX 3: COMMENTARY ON THE S-N CURVES WITH REFERENCE TO VARIABLE AMPLITUDE LOADING

pp.： 53 – 56

APPENDIX 4: HOT SPOT S-N CURVES FOR WELDED ALUMINIUM COMPONENTS

pp.： 56 – 57

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