Correlation Procedures for Fatigue Life Determination

[+] Author and Article Information
R. Kouta

Université de Technologie de Belfort-Montbéliard, Laboratoire d’Ingénierie de Produit, Rue du château-90010-SEVENANS

D. Play

Institut National des Sciences Appliquées de Lyon, Laboratoire Conception et Analyse de Systèmes Mécaniques, 20, Av. Albert EINSTEIN, Bât. 113, 69621-VILLEURBANNE Cedex FRANCE

J. Mech. Des 121(2), 289-296 (Jun 01, 1999) (8 pages) doi:10.1115/1.2829456 History: Received April 01, 1997; Revised February 01, 1999; Online December 11, 2007


Fatigue life determination of vehicle parts requires fine definition of load spectra applied. Significant load spectra must be defined from experimental data. Then, using Gram-Charlier-Edgeworth mathematical developments, global shapes of loading distribution curves are obtained. In addition to considering the physical aspect of material fatigue behaviour, a local definition of extreme loading is introduced. Frequency analyses are linked to the distribution of amplitudes. 200 practical recordings are analysed. Equivalent load spectra are compared to S-N curves and correlations between real loading of vehicle parts in service and laboratory test loading are obtained.

Copyright © 1999 by The American Society of Mechanical Engineers
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