Comparison of PSD analysis methods in frequency domain fatigue analysis

Joon Jang, Jae Myung Cho, Kwang Hee Lee, Won Woong Lee, Woo Chun Choi

Research output: Contribution to journalArticle

Abstract

If fatigue failure occurs during aircraft operation, it can cause catastrophic injuries. So, it is necessary to study fatigue failure at the design stage. Frequency domain fatigue analysis is used to predict fatigue failure. During frequency domain fatigue analysis, results can be calibrated by PSD analysis. In this study, fatigue failure is predicted by the Dirlik method, Lalanne method and Steinberg method. Regarding results, life determined by the Dirlik method, Lalanne method and Steinberg method were 8.737, 8.314, and 7.901 times the standard life, respectively. The Steinberg method is the most conservative but the difference with other methods was approximately 10%. In the cycle histogram, the Dirlik method had more counts than the Lalanne method in lower stress range. However, it does not affect the life of material used in this study. However, if material has a lower fatigue limit or stronger PSD data is used, life difference will occur.

Original languageEnglish
Pages (from-to)737-743
Number of pages7
JournalJournal of the Korean Society for Precision Engineering
Volume36
Issue number8
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • Aircraft
  • Fatigue failure
  • Frequency domain fatigue analysis
  • PSD

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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