Weibull or Lognormal Distribution to Characterize Fatigue Life Scatter - Which is More Suitable? - Continued

• Autorzy: Plaskitt Rob , Wynn-Jones Chris , Halfpenny Andrew

Identyfikatory

DOI

10.2478/fas-2024-0011

• Języki publikacji: EN

Abstrakty

EN

This paper describes a study to determine whether fatigue test life scatter is best characterised by a Weibull or lognormal statistical distribution for a high strength steel used for landing gear structures. It is a response to “Face 2” of the ICAF 2017 Plantema Memorial Lecture and 2019 follow-up paper with the question; “Weibull or Lognormal Distributions to Characterize Fatigue Life Scatter?” These concluded that a Weibull distribution appears to be more suitable than a lognormal distribution for statistical modelling of fatigue life scatter to define an allowable service life at a specific probability of failure. Those studies used a homogenous dataset of 18 fatigue tests, and a non-homogenous dataset of 86 fatigue tests from a variety of sources. This paper reviewed HBK historical fatigue tests to identify a homogeneous dataset of 371 fatigue tests for a high strength steel used for landing gear structures. Weibull and lognormal statistical modelling of this dataset concluded that its fatigue life scatter is best characterized by the lognormal distribution.

Słowa kluczowe

EN

fatigue life scatter; Weibull; lognormal; statistical distributions

• Wydawca: Wydawnictwa Naukowe Sieci Badawczej Łukasiewicz - Instytutu Lotnictwa
• Czasopismo: Fatigue of Aircraft Structures
• Rocznik: 2024
• Tom: Iss.16
• Strony: 131--146
• Opis fizyczny: Bibliogr. 11 poz., tab., wykr.

Twórcy

autor

Plaskitt Rob

• Hottinger Bruel & Kjaer Ltd, United Kingdom

• https://orcid.org/0000-0001-8872-5345

autor

Wynn-Jones Chris

• Hottinger Bruel & Kjaer Ltd, United Kingdom

• https://orcid.org/0009-0001-5373-0977

autor

Halfpenny Andrew

• Hottinger Bruel & Kjaer Ltd, United Kingdom

• https://orcid.org/0009-0004-0494-9122

Bibliografia

• Abernethy, R. B. (2006). The new weibull handbook, 5th edition. Abernethy.
• Brot, A. (2017). Plantema memorial lecture - three faces of aeronautical fatigue. In Proceedings of the 29th ICAF symposium, Nagoya, Japan (pp. 1186-1225). VTT Information Service.
• Brot, A. (2019). Weibull or log-normal distribution to characterize fatigue life scatter - which is more suitable? In A. Niepokolczycki & J. Komorowski (Eds.), ICAF 2019 - Structural Integrity in the Age of Additive Manufacturing. ICAF 2019. Lecture Notes in Mechanical Engineering (pp. 551-561). Springer, Cham. https://doi.org/10.1007/978-3-030-21503-3_44
• Brot, A. (2019). Weibull or log-normal distribution to characterize fatigue life scatter - which is more suitable? 30th ICAF Symposium presentation slides, following correspondence with Brot.
• Goranson, U. G. (1997). Fatigue issues in aircraft maintenance and repairs. International Journal of Fatigue, 19(93), 3-21. https://doi.org/10.1016/s0142-1123(97)90029-3
• ReliaSoft. (2024). Life Data Analysis Reference. https://help.reliasoft.com/reference/life_data_analysis/pdfs/lda_ref.pdf
• Schijve, J. (1992). A normal distribution or a weibull distribution for fatigue lives (LR-689). Delft University of Technology, Netherlands.
• Schijve, J. (2009). Fatigue of structures and materials, 2nd edition. Springer.
• Schijve, J., & Jacobs, F. A. (1955). Fatigue tests on notched and unnotched clad 24 S-T sheet specimens to verify the cumulative damage hypothesis (M-1982). Nat. Aerospace Laboratory, Netherlands.
• Whittaker, I. C. (1972). Development of titanium and steel fatigue variability model for application of reliability analysis approach to aircraft structures (Technical Report AFML-TR-72-236). The Boeing Company.
• Whittaker, I. C., & Besuner, P. M. (1969). A reliability analysis approach to fatigue life variability of aircraft structures (Technical Report AFML-TR-69-65). The Boeing Company.

Uwagi

This article was presented at the 32nd Symposium of ICAF https://www.icaf2025.com/