Journal of Materials Science

, Volume 20, Issue 9, pp 3239–3244 | Cite as

Prediction of cumulative fatigue damage

  • Muhammad Aslam
  • Shaik Jeelani
Papers

Abstract

The life of a component subjected to a constant stress can be determined using the S-N diagram. Prediction of cumulative fatigue damage or fatigue life of a component subjected to a given stress sequence of varying amplitude is difficult, if not impossible. Miner's rule and Kramer's equation can predict cumulative fatigue damage with a reasonable degree of accuracy for limited cases. The development of Kramer's equation was studied and a modification suggested. Cumulative fatigue data generated using aluminium alloys 2011-T3 and 2024-T4, were analysed using Miner's, Kramer's and the modified equations. While Miner's rules and Kramer's equation predict cumulative fatigue damage with tolerable error for a few cases, the modified equation has shown close agreement between the experimental and theoretical values of fatigue life or cumulative fatigue damage for the materials studied in this investigation.

Keywords

Fatigue Aluminium Alloy Fatigue Life Stress Ratio Fatigue Damage 

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Copyright information

© Chapman and Hall Ltd 1985

Authors and Affiliations

  • Muhammad Aslam
    • 1
  • Shaik Jeelani
    • 1
  1. 1.School of Engineering and ArchitectureTuskegee InstituteTuskegeeUSA

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