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Stress Determination for Fatigue Analysis of Welded Components

1995-04-30 Technology & Engineering
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Release : 1995-04-30
Genre : Technology & Engineering
Kind : eBook
Book Rating : 131/5 ( reviews)

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Book Synopsis Stress Determination for Fatigue Analysis of Welded Components by : E. Niemi

Download or read book Stress Determination for Fatigue Analysis of Welded Components written by E. Niemi. This book was released on 1995-04-30. Available in PDF, EPUB and Kindle. Book excerpt: This report introduces definitions of the terminology relevant to stress determination for fatigue analysis of welded components. The various stress concentrations, stress categories and fatigue analysis methods are defined. Fatigue analysis methods considered are nominal stress, hot spot stress, notch stress, notch strain and fracture mechanics approaches. The report also contains comprehensive recommendations concerning the application of finite element methods and experimental methods for stress determination. It is intended for fatigue design of common welded structures, such as cranes, excavators, vehicle frames, bridges, ship hulls, offshore structures etc. fabricated from materials at least 3mm thick. In general, attention is focused on weld details which give rise to fatigue cracking from the surface, notably from the weld toe.

Fatigue Analysis of Welded Components

2006-09-27 Technology & Engineering
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Release : 2006-09-27
Genre : Technology & Engineering
Kind : eBook
Book Rating : 662/5 ( reviews)

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Book Synopsis Fatigue Analysis of Welded Components by : E. Niemi

Download or read book Fatigue Analysis of Welded Components written by E. Niemi. This book was released on 2006-09-27. Available in PDF, EPUB and Kindle. Book excerpt: 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 approach. Provides practical guidance on the application of the structural hot-spot stress approach Discusses stress determination from both finite element analysis and strain gauge measurements Practical application of the recommendations is illustrated in two case studies

Structural Hot-Spot Stress Approach to Fatigue Analysis of Welded Components

2017-08-28 Technology & Engineering
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Release : 2017-08-28
Genre : Technology & Engineering
Kind : eBook
Book Rating : 688/5 ( reviews)

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Book Synopsis Structural Hot-Spot Stress Approach to Fatigue Analysis of Welded Components by : Erkki Niemi

Download or read book Structural Hot-Spot Stress Approach to Fatigue Analysis of Welded Components written by Erkki Niemi. This book was released on 2017-08-28. Available in PDF, EPUB and Kindle. Book excerpt: This book provides background and guidance on the use of the structural hot-spot stress approach to fatigue analysis. The book also offers Design S-N curves for use with the structural hot-spot stress for a range of weld details, and presents parametric formulas for calculating stress increases due to misalignment and structural discontinuities. Highlighting the extension to structures fabricated from plates and non-tubular sections. The structural hot-spot stress approach focuses on cases of potential fatigue cracking from the weld toe and it has been in use for many years in tubular joints. Following an explanation of the structural hot-spot stress, its definition and its relevance to fatigue, the book describes methods for its determination. It considers stress determination from both finite element analysis and strain gauge measurements, and emphasizes the use of finite element stress analysis, providing guidance on the choice of element type and size for use with either solid or shell elements. Lastly, it illustrates the use of the recommendations in four case studies involving the fatigue assessment of welded structures using the structural hot-spot stress

Recommendations Concerning Stress Determination for Fatigue Analysis of Welded Components

1994
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Release : 1994
Genre :
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis Recommendations Concerning Stress Determination for Fatigue Analysis of Welded Components by : Erkki Niemi

Download or read book Recommendations Concerning Stress Determination for Fatigue Analysis of Welded Components written by Erkki Niemi. This book was released on 1994. Available in PDF, EPUB and Kindle. Book excerpt:

Fatigue Life Analyses of Welded Structures

2013-03-01 Technology & Engineering
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Release : 2013-03-01
Genre : Technology & Engineering
Kind : eBook
Book Rating : 704/5 ( reviews)

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Book Synopsis Fatigue Life Analyses of Welded Structures by : Tom Lassen

Download or read book Fatigue Life Analyses of Welded Structures written by Tom Lassen. This book was released on 2013-03-01. Available in PDF, EPUB and Kindle. Book excerpt: 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.

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