Planning inspections in service of fatigue-sensitive aircraft structure components under crack propagation

• Autorzy: Nechval K. N. , Nechval N. A. , Berzins G. , Purgailis M.
• Języki publikacji: EN

Abstrakty

EN

For important fatigue-sensitive structures of aircraft whose breakdowns cause serious accidents, it is required to keep their reliability extremely high. In this paper, we discuss inspection strategies for such important structures against fatigue failure. The focus is on the case when there are fatigue-cracks unexpectedly detected in a fl eet of aircraft within a warranty period (prior to the fi rst inspection). The paper examines this case and proposes stochastic models for prediction of fatigue-crack growth to determine appropriate inspections intervals. We also do not assume known parameters of the underlying distributions, and the estimation of that is incorporated into the analysis and decision-making. Numerical example is provided to illustrate the procedure.

Słowa kluczowe

EN

aircraft; fatigue crack; inspection interval

• Wydawca: Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne
• Czasopismo: Eksploatacja i Niezawodność
• Rocznik: 2007
• Tom: nr 4
• Strony: 3--8
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Nechval K. N.

autor

Nechval N. A.

autor

Berzins G.

autor

Purgailis M.

• Applied Mathematics Department Transport and Telecommunication Institute Lomonosov, Street 1, LV-1019 Riga, Latvia,

Bibliografia

• [1] Bogdanoff J.L., Kozin F.: Probabilistic Models of Cumulative Damage. New York: Wiley, 1985.
• [2] Jones R., Molent L., Pitt S.: Studies in multi-site damage of fuselage lap joints. J. Theor. Appl. Fract. Mech. vol. 32, 1999, p. 18–100.
• [3] Kapur K.C., Lamberson L.R.: Reliability in Engineering Design. New York: Wiley, 1977.
• [4] Nechval N.A., Nechval K.N., E.K. Vasermanis E.K.: Statistical models for prediction of the fatigue crack growth in aircraft service. In: Varvani-Farahani A. & Brebbia C.A. (editors), Fatigue Damage of Materials 2003, Southampton, Boston: WIT Press, 2003, p. 435-445.
• [5] Paris R., Erdogan F.: A critical analysis of crack propagation laws. Journal of Basic Engineering, vol. 85, 1963, p. 528–534.
• [6] Wu W.F., Ni C.C., Liou H.Y.: Random outcome and stochastic analysis of some fatigue crack growth data. Chin. J. Mech. vol. 17, 2001, p. 61–68.
• [7] Yang J.N., Manning S.D.: A simple second order approximation for stochastic crack growth analysis. Engng. Fract. Mech. vol. 53, 1996, p. 677–686.