Maintenance Scheduling in Risk Assessment Procedures


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The probabilistic analysis of evolutive states of damage, as those induced by fatigue loads, has been the subject of a wide spectrum of researches in the most recent years, in order to widen the range of applications and to deal with large structures, especially in the aeronautical field, where the high safety requirements need the evaluation of very small probabilities of failure. However, the problem of maintenance policies and scheduling, together with the probabilistic behaviour of NDT, are difficult to introduce in risk assessment procedures, and are usually referred as if coming from the particular experience of the different authors, even if they constitute an essential part of damage tolerance techniques. In the present work the authors summarize the capabilities of an house-made code which is able to perform the risk assessment of aeronautical components of sheet type and the experiences obtained when introducing maintenance models, in order to begin to compare different scheduling techniques.



Key Engineering Materials (Volumes 324-325)

Edited by:

M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz




A. Soprano and F. Caputo, "Maintenance Scheduling in Risk Assessment Procedures", Key Engineering Materials, Vols. 324-325, pp. 559-562, 2006

Online since:

November 2006




[1] Ditlevsen, O.; Madsen, H.O.: Structural reliability methods - John Wiley & Sons Ltd, Baffin Lane, Chichester, UK, (1996).

[2] Melchers, R.E.: Structural reliability analysis and prediction - John Wiley & Sons; Chichester, West Sussex, UK, (1999).

[3] S. Soprano, F. Caputo: Building risk assessment procedures, submitted to Structural Integrity and Durability (2005).

[4] U.G. Goranson: Fatigue issues in aircraft maintenance and repairs - Int. j. Fatigue, vol. 19, supp. no. 1, 1997, pp. S3-S21.

[5] G. Deodatis, H. Asada, S. Ito - Reliability of aircraft structures under non-periodic inspection: a bayesian approach - Engineering Fracture Mechanics, vol. 53, no. 5, 1996, pp.789-805.


[6] H.P. Hong - Reliability analysis with nondestructive inspection - Structural Safety, vol 19, no. 4, 1997, pp.383-395.

[7] D. Kumar, U. Westberg - Maintenance scheduling under age replacement policy using proportional hazards model and TTT-plotting - European Journal of Operational Research, vol. 99, 1997, pp.507-515.


[8] A.D. Boyd-Lee, G.F. Harrison, M.B. Henderson - Evaluation of standard life assessment procedures and life extension methodologies for fracture-critical components - Int. J. Fatigue, vol. 23, 2001, pp. S11-S19.


[9] A. Apicella, L. D'Antonio, F. Schettino, A. Soprano: Application of durability analysis to glare aeronautical components, Int. J. Fatigue, vol. 18, n. 4, 1996, pp.265-272; Fig. 4 - The effect of maintenance on the length of existing cracks.