Interactive Resource icon  Fatigue: S-N Curves

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Description: The traditional method for determining fatigue life involves measuring the total life for crack initiation and growth. Since the time for crack initiation is very sensitive to the surface finish of the material, it is critical that this is carefully controlled. Tests are performed across a range of stress amplitudes and plot of stress amplitude (S) against cycles to failure (N) is produced, commonly known as an S-N curve. This animations shows a typical S-N curve.
Keywords: fatigue • S-N curve • crack
Categories: Science approaches > Deformation & failure > Fatigue
Materials > Metals & alloys > Aluminium & alloys
Properties > Mechanical & thermal
Testing, analysis & experimentation > Mechanical testing
Created by: Hugh Shercliff, University of Cambridge
Joseph Robson, Manchester Materials Science Centre
MATTER, The University of Liverpool
Contributions: John Humphreys, Manchester Materials Science Centre
Christian Leppin, Alcan Fabrication Europe
Published by: European Aluminium Association, Brussels
License: This resource is released under the Creative Commons Attribution Non-Commercial No Derivatives license (2.0 UK: England & Wales).
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Date created: 18 October 2004
Date added: 09 June 2010
Resource ID: 2834