Print Email Facebook Twitter Patch repair of corroded aircraft skin areas Title Patch repair of corroded aircraft skin areas Author 't Hart, W.G.J. Wanhill, R.J.H. Institution National Aerospace Laboratory NLR Date 1986-03-30 Abstract Environmental conditions in Europe are conducive to corrosion attack of aircraft structures. In military aircraft corrosion problems occur especially at countersunk fastener holes. The corrosion is generally removed by grinding. A limited amount of material removal is specified by the aircraft manufacturers, but it is sometimes necessary to exceed these limits. When this happens a repair is necessary to allow continued operation. An investigation of the effectiveness of bonded patch repairs was carried out. The patch materials were aluminium alloy sheet and aramid fibre reinforced composite prepreg. A cold curing acrylic based adhesive was used for bonding. Specimens with simulated patch repairs were subjected to both constant amplitude and flight simulation fatigue testing under various environmental conditions. The results indicated that bonded patches are potentially very good repairs for areas weakened by corrosion and its removal. Presented at: The AGARD specialists Meeting on "The repair of aircraft structures involving composite materials". Oslo. Norway. l4-16 April 1986. Subject RepairCorrosionCompositesAlluminium alloysFatigue testsEnvironmental testsFlight simulationMilitary aircraftF-5 aircraft To reference this document use: http://resolver.tudelft.nl/uuid:44710192-0b99-44a0-b217-607ac38f9185 Publisher Nationaal Lucht- en Ruimtevaartlaboratorium Access restriction Campus only Source NLR MP 86014 U Part of collection Aerospace Engineering Reports Document type report Rights (c) 1986 National Aerospace Laboratory NLR Files PDF 86014.pdf 7.61 MB Close viewer /islandora/object/uuid:44710192-0b99-44a0-b217-607ac38f9185/datastream/OBJ/view