IIW Recommendations for the Fatigue Assessment of Welded Structures By Notch Stress Analysis

1st Edition

IIW-2006-09

Authors: W Fricke
Paperback ISBN: 9780857098559
Imprint: Woodhead Publishing
Published Date: 22nd October 2012
Page Count: 46

Institutional Access


Table of Contents

Background to the approach; Numerical analysis of notch stresses; Fatigue strength; Demonstration examples.

Description

The notch stress approach for fatigue assessment of welded joints is based on the highest elastic stress at the weld toe or root. In order to avoid arbitrary or infinite stress results, a rounded shape with a reference radius instead of the actual sharp toe or root is usually assumed. IIW recommendations for the fatigue assessment of welded structures by notch stress analysis reviews different proposals for reference radii together with associated S-N curves. Detailed recommendations are given for the numerical analysis of notch stress by the finite or boundary element method. Several aspects are discussed, such as the structural weakening by keyhole-shaped notches and the consideration of multiaxial stress states. Appropriate S-N curves are presented for the assessment of the fatigue strength of different materials. Finally, four examples illustrate the application of the approach as well as the variety of structures which can be analysed and the range of results that can be obtained from different models.

Key Features

  • Provides detailed recommendations for the number analysis of notch stress by the finite or boundary element method
  • Discusses structural weakening by keyhole-shaped notches and the consideration of multiaxial stress states
  • Provides four comprehensive examples, illustrating the variety of structures which can be analysed and the range of results that can be obtained from different models

Readership

Welding engineers


Details

No. of pages:
46
Language:
English
Copyright:
© Woodhead Publishing 2012
Published:
Imprint:
Woodhead Publishing
Paperback ISBN:
9780857098559

About the Authors

W Fricke Author

Professor Dr-Ing. Wolfgang Fricke is Head of the Institute for Ship Structural Design and Analysis at Hamburg University of Technology, Germany.

Affiliations and Expertise

Hamburg University of Technology, Germany