This book provides background and guidance on the use of the structural hot-spot stress approach to fatigue analysis. It 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

Autorentext

Erkki Niemi is Emeritus Professor of Steel Structures in Lappeenranta University of Technology, Finland.

Wolfgang Fricke is Professor (retired) of the Institute for Ship Structural Design and Analysis at Hamburg University of Technology, Germany.

Stephen J. Maddox is a Consultant with The Welding Institute (TWI) in the UK and is also Visiting Professor in the Department of Mechanical Engineering at the University of Strathclyde, UK.

Inhalt

Introduction.- The Structural Hot-Spot Approach To Fatigue Analysis.- Experimental Determination Of The Structural Hot- Spot Stress.- Structural Hot-Spot Stress Determination Using Finite Element Analysis.- Parametric Formulae.- Structural Hot-Spot S-N Curves.- Case Study 1.- Case Study 2.- Case Study 3.- Case Study 4.