The desirable effects of cold working materials on the fatigue and static strength of components has long been known, but it is only in relatively recent years that it has been applied in general aircraft components designed for minimum weight, as opposed to large critical components, viz. auto-frettage applied to gun barrels and other pressure vessels. For landing gear components, the increasing use of high strength aluminium alloys and ultra high strength steels introduced new problems because of reduced section sizes with a resulting increase of flexibility which gives a greater interaction between the various members, which affects the stress in these members. This presentation reviews the factors which influence the decision process for selection of particular landing gear geometries and the selection of materials by type and specification is also discussed with the evaluation of stress levels under ultimate, fatigue and static loads. It then reviews the progressive increase of the use of shot-peening at Dowty Rotol from its initial adoption to improve fatigue strength in localised areas to its more widespread application to counter the effects of processing on fatigue and to reduce stress corrosion.
Aircraft landing gears: an application for shot-peening
Flugzeugfahrwerke: Ein Anwendungsgebiet fuer das Kugelstrahlen
Impact Surface Treatment, 2nd Int. Conf. ; Sep ; 95-100
1986
6 Seiten, 2 Bilder, 1 Quelle
Conference paper
English
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