Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Prediction of Gear Bending Fatigue Life of Electro-mechanical Actuator for Aircraft Through Finite Element Analysis

  • Kim, Taehyung (Major of Aeronautical & Mechanical Engineering, Division of Aeronautics, Cheongju University) ;
  • Seok, Taehyeon (Major of Aeronautical & Mechanical Engineering, Division of Aeronautics, Cheongju University) ;
  • Kwon, Soon-hyeong (PGM R&D Laboratory, LIG Nex1 Co. Ltd.) ;
  • Lee, Byung-ho (PGM R&D Laboratory, LIG Nex1 Co. Ltd.) ;
  • Kwon, Byung-gi (PGM R&D Laboratory, LIG Nex1 Co. Ltd.) ;
  • Kwon, Jun-yong (Aerospace Technology Research Institute, Agency for Defence Development) ;
  • Cheong, Seong-kyun (Dpt. Mechanical and Automotive Engineering, Seoul National University of Science and Technology)
  • Received : 2020.09.15
  • Accepted : 2020.10.20
  • Published : 2020.12.31
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Abstract

In this study, finite element fatigue analysis combined with a fatigue correlation factor is proposed to predict the bending fatigue life of a gear in an electro-mechanical aircraft actuator. First, stress-life curves are obtained for the gear material via a round bar fatigue test. Subsequently, stochastic stress-life (P-S-N) curves are derived for 50% and 1% failure probabilities, separately. The curves are applied to the fatigue analysis model of a single gear tooth, and the effect of the fatigue correction factor is analyzed. The analytical P-S-N curves reflecting the fatigue correction factor matched the experimental data. This shows that the analytical fatigue life is reliable and that the analysis technique is effective.

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References

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