NEL SETTORE AERONAUTICO I MATERIALI NEL SETTORE AERONAUTICO Maurizio Pizzamiglio

Come si progetta

Carichi - Aerodinamici da manovra (simmetrici- asimmetrici) - da raffiche (verticali, laterali) - Propulsivi - spinta - coppie - CARICHI d'atterraggio  -su portaerei o simili  -su ruota o pattino -su acqua -d'arresto - Di decollo - normale - catapulta - con razzi - Speciali - cabina pressurizzata - da traino  velivolo - da sollevamento velivolo

Missione tipica

Diagramma di manovra e di raffica 66 fps C A 50 fps D 25 fps n1 S n4 1 Vs Va Vne Vd V Vsr n3 n2 25 fps -1 E H G 66 fps F 50 fps

Carichi

Curva di Wöhler

MATERIAL INTRODUCTION STRESS-STRAIN curves MATERIAL INTRODUCTION The deformation and fracture response of a material to externally applied forces are affected by many factors: metallurgy alloying crystal formation heat-treatments environment No successful theory for prediction of the properties of materials (in the future too) The significant properties of materials for structural design purposes are determined experimentally Tension and compression coupon tests provide the simplest information on mechanical properties. Experimental data are recorded on

Elemento   Lega 7075 2024 2219 2014 2017 6061 Cu 1,6 4,5 6,0 4,45 4,0 0,28 Mg 2,5 1,5 - 0,50 1,0 Mn 0,65 0,3 0,80 0,70 Zn 5,7 Si 0,85 0,60 Cr 0,25 Ti 0,15 max. V 0,10 Zr 0,15 Materiale A % s tr Kp/mm2 s cs Ec s 0,7 n t R 2014-T6 [ estrusi t <= 12 mm ] 7 42,2 37,3 7530 18,5 24,6 2014-T6 [ forgiati t <=100 mm ] 43,6 36,6 36,8 20 27,4 2024-T3 [Piastre e lamiere t <= 6 mm ] 12 45,7 28,1 11,5 2024-T4 [ Piastre e lamiere t <= 12 mm ] 26,7 25,8 15,6 2024-T3 [ Lamiere plastate 0,5 < t < 1,6 mm ] 26,0 25,1 2024-T6 Lamiere placcate e piastre t > 1,6 mm 8 34,5 11 Lamiere placcate e piastre t < 1,6 mm 33,1 10,6 25,3 2024-T81 [ Lamiere placcate t <= 1,6 mm ] 5 38,7 39,4 11,2 6061-T6 [ Lamiere t <= 6 mm ] 10 29,6 7100 31 17,2 7 Lamiere e piastre t <= 12 mm 53,5 47,1 7390 49,3 9,2 32,4 0 Estrusi t <= 6 mm 52,8 50,7 16,6 30,2 7 Stampati t <= 50 mm 50,0 40,8 41,2 15,2 31,7 5 Forgiati a mano Area <= 10 Cm2 4 44,3 44,9 25 - Lamiere placcate e piastre t <= 12 mm 45,0 45,4 19,5 T6   7079-T6 Forgiati a mano t <= 150 mm 41,5 41,9 26 27,3

Wing Attach Pylon Fitting SYSTEMS Ventilation Impeller WING &STABILIZER Spar Rib Skin Mechanisms & Fittings FUSELAGE Floor Assemblies Frames Floor Cross Beam Seat Tracks Bulkhead Baggage Door Access Doors Keel Beam Canopy Beams Seat Assemblies Windows Frames COCKPIT Window Frames Dashboard Center Pedestral & Sides Engine Mount Assy Engine Attach Pylon Fitting Wing Attach Pylon Fitting Titanium Ribs Panels Engine Pylon Assemblies SYSTEMS Ventilation Impeller Fuel Pipe Connectors LANDING GEAR Torque Links Towing Fitting Doors Goose Necks Fitting assemblies Nacelle & Thrust reverser & Engine Ring Beams & Frames Equipments Suspension Case Blades Flow Splitter DOORS Structure Mechanisms Hinges Fittings

Frame 16 – A380 Nose Landing Gear Box 8ft (2500mm) 13ft (4000mm) Frame 42 – A320 Frame 1 – A380 16ft (4900mm) 5ft (1500mm) Frame 16 – A380 Nose Landing Gear Box Back to menu

Floor Assy Section 12 A350 XWB (Design and built contract) 20ft (6000mm) 8ft (2500mm) Floor Assy T15 – A330 PAX Floor Assy T15 – A330 GMF 16.22ft (5070mm) 12.16ft (3800mm) Floor Assy Section 12 A350 XWB (Design and built contract) Back to menu

Outboard Aft Spar - G650 Wing Spar - G650 Outboard Front Spar G650 42ft long Outboard Rear Spar G650 36ft long Outboard Aft Spar - G650 Wing Spar - G650 Back to menu

12ft (3650mm) 30ft (9000mm) Elevator Panel Falcon 900/2000 Wing Skin Attachment Fitting ATR 42/72 Machining + Forming Elevator Panel Falcon 900/2000 Wing Skin Legacy 450 Wing skin Machining + Forming 30ft (9000mm) Vertical Stabilizer Skin FALCON 900/2000 Wing skin – FALCON 900/2000

Flap Track Titanium - RAIL ERJ190 43’’x16’’ (1100mm x 400mm) Flap Track Titanium - RAIL LEGACY 450 EMBRAER

Titanium Panel – A350 Back to menu

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Comportamento a fatica

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