Assessing and maintaining continued airworthiness in the presence of wide spread fatigue damage: an Australian perspective

Jones, Rhys

doi:10.1016/s0013-7944(97)00021-0

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…The concentration of previous research has been on the structural behavior of the wing. These studies mainly focused on the effect of patch sizes on the development of cracks as well as the fatigue behavior of repair sheets (1) . Unfortunately, not enough research has been done to determine the aerodynamic characteristics of a damaged or repaired wing.…”

Section: Nomenclaturementioning

confidence: 99%

A comprehensive numerical study of battle damage and repairs upon the aerodynamic characteristics of an aerofoil

Saeedi¹,

Ajalli

Mani

2010

Aeronaut. j.

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A NACA 641-412 aerofoil with circle and star damage and also three repair configurations has been numerically investigated. Two different methods of mesh generation were employed: multi structured mesh for the star damaged aerofoil and unstructured mesh for the other aerofoils. The results show that the damage will cause a reduction in lift coefficient of the aerofoil and also a different stall angle relative to that of the undamaged aerofoil. Each kind of repair improves the aerodynamic characteristics of the aerofoil considerably. The flow Field inside the damage hole and the cavity caused by the repair sheets was also investigated. Finally, the numerical solution was qualitatively and quantitatively validated using the available experimental results.

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Section: Nomenclaturementioning

confidence: 99%

A comprehensive numerical study of battle damage and repairs upon the aerodynamic characteristics of an aerofoil

Saeedi¹,

Ajalli

Mani

2010

Aeronaut. j.

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“…In a similar way we have to point out the interest in airplane safety which arose after the Aloha accident [1,2] for civil aviation and after the Royal Australian Air force (RAAF) Machi accident [2] for military aviation associated to the presence of the cracks [3]. If the number of crack is limited and the crack or hole size is small compared to the damaged component, repairs are less expensive, otherwise the component should be replaced [4].…”

Section: Introductionmentioning

confidence: 99%

“…Baker [2] has been a pioneer in the design and assessment of repairs in 1970 at the Australian Research Laboratory (ARL) where he worked for the RAAF. Among his colleagues, Jones introduced the adhesively bonded repairs in the military aviation.…”

Section: Introductionmentioning

confidence: 99%

Some aspects and aerodynamic effects in repairing battle damaged wings

Djellal¹,

Ouibrahim²

2009

WIT Transactions on Modelling and Simulation

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This paper concerns an experimental investigation, conducted to estimate the aerodynamic effects of aircraft battle-damage repair patches. Of particular concern in this study are the wings. Three different repair schemes are considered, lower (repair at the intrados), upper (repair at the extrados) and full repairs (both intrados and extrados at the same time). Preliminary results clearly showed that repair patches improve the aerodynamic performances of the damaged aircraft model. The full repair was shown to achieve the best recovery of the aerodynamic performances provided that the patch is thin enough. Repairs performed on only one surface (i.e. upper or lower) were also shown to provide significant aerodynamic improvements. The improvement tendency decreases with the increase of the patch thickness. Above a certain thickness value, the fineness decreases below the fineness of the damaged unrepaired model.

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