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International Committee on Aeronautical Fatigue

ICAF 2019: ICAF 2019 – Structural Integrity in the Age of Additive Manufacturing pp 551–561Cite as

Weibull or Log-Normal Distribution to Characterize Fatigue Life Scatter – Which Is More Suitable?

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Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

Abstract

This paper is a follow-up to the Plantema Memorial Lecture that was presented by the author at the ICAF 2017 Symposium at Nagoya, Japan (Brot 2017). It will be shown in this paper, that there may be very large differences between the Weibull and Log-Normal statistical distributions of fatigue test results. These large differences have been confirmed using special software, that is commercially available. Fatigue test data from several sources have been combined to result in an 86-specimen database of fatigue life results. Analysis of these test results, using the software indicated above, determined that the Weibull distribution gave much more suitable results than the Log-Normal distribution.

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References

  • Abernethy, R.B.: The New Weibull Handbook, 5th edn (2004)

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  • Brot, A.: Plantema Memorial Lecture. In: Proceedings of the 27th Symposium of the International Committee on Aeronautical Fatigue and Structural Integrity (ICAF), Nagoya, Japan (2017)

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  • Metallic Material Properties Development and Standardization Manual (MMPDS): Version 9 (2014)

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  • Schijve, J.: Fatigue of Structures and Materials, 2nd edn. Springer (2009)

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  • SuperSMITH Software: Release 5.0-CY, developed by Fulton Findings (2014)

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Author information

Authors and Affiliations

  1. A. Brot, Engineering Consultants, 18 Ben-Yehuda Street, Petah-Tikva, 4937306, Israel

    Abraham Brot

Authors
  1. Abraham Brot
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Corresponding author

Correspondence to Abraham Brot .

Editor information

Editors and Affiliations

  1. Institute of Aviation, Warsaw, Poland

    Antoni Niepokolczycki

  2. JPWK Aerospace, Ottawa, ON, Canada

    Jerzy Komorowski

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Cite this paper

Brot, A. (2020). Weibull or Log-Normal Distribution to Characterize Fatigue Life Scatter – Which Is More Suitable?. In: Niepokolczycki, A., Komorowski, J. (eds) ICAF 2019 – Structural Integrity in the Age of Additive Manufacturing. ICAF 2019. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-21503-3_44

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  • DOI: https://doi.org/10.1007/978-3-030-21503-3_44

  • Published:

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-21502-6

  • Online ISBN: 978-3-030-21503-3

  • eBook Packages: EngineeringEngineering (R0)

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