Maurizio Pizzamiglio I MATERIALI NEL SETTORE AERONAUTICO.
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Transcript of Maurizio Pizzamiglio I MATERIALI NEL SETTORE AERONAUTICO.
Maurizio Pizzamiglio
I MATERIALI
NEL SETTORE AERONAUTICO
Come si progetta
- 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
Carichi
Missione tipica
5
D
C
E
G FH
A
S
n
1
V
-1
n1
n2
n4
n3
Va
Vsr
Vs VdVne
66 fps 50
fps
25 fps
25 fps
50 fps
66 fps
Diagramma di manovra e di Diagramma di manovra e di raffica raffica
Carichi
Curva di Wöhler
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 6061Cu 1,6 4,5 6,0 4,45 4,0 0,28
Mg 2,5 1,5 - 0,50 0,50 1,0
Mn - 0,65 0,3 0,80 0,70 -
Zn 5,7 - - - - -
Si - - - 0,85 - 0,60
Cr 0,25 - - - - 0,25
Ti - - - - - 0,15 max.
V - - 0,10 - - -
Zr - - 0,15 - - -
Materiale A%
tr
Kp/mm2
cs
Kp/mm2
EcKp/mm2
0,7
Kp/mm2
n R
Kp/mm2
2014-T6 [ estrusi t <= 12 mm ] 7 42,2 37,3 7530 37,3 18,5 24,6
2014-T6 [ forgiati t <=100 mm ] 7 43,6 36,6 7530 36,8 20 27,4
2024-T3 [Piastre e lamiere t <= 6 mm ] 12 45,7 28,1 7530 27,4 11,5 28,1
2024-T4 [ Piastre e lamiere t <= 12 mm ] 12 45,7 26,7 7530 25,8 15,6 28,1
2024-T3 [ Lamiere plastate 0,5 < t < 1,6 mm ] 12 42,2 26,0 7530 25,1 12 26,7
2024-T6 Lamiere placcate e piastre t > 1,6 mm 8 43,6 34,5 7530 43,6 11 26,0
Lamiere placcate e piastre t < 1,6 mm 8 42,2 33,1 7530 33,1 10,6 25,3
2024-T81 [ Lamiere placcate t <= 1,6 mm ] 5 43,6 38,7 7530 39,4 11,2 26,7
6061-T6 [ Lamiere t <= 6 mm ] 10 29,6 24,6 7100 24,6 31 17,2
7 Lamiere e piastre t <= 12 mm 7 53,5 47,1 7390 49,3 9,2 32,4
0 Estrusi t <= 6 mm 7 52,8 49,3 7390 50,7 16,6 30,2
7 Stampati t <= 50 mm 7 50,0 40,8 7390 41,2 15,2 31,7
5 Forgiati a mano Area <= 10 Cm2 4 50,7 44,3 7390 44,9 25 31,7
- Lamiere placcate e piastre t <= 12 mm 8 49,3 45,0 7390 45,4 19,5 31,7
T6
7079-T6 Forgiati a mano t <= 150 mm 4 47,1 41,5 7390 41,9 26 27,3
WING &STABILIZERSparRibSkinMechanisms & Fittings
FUSELAGEFloor AssembliesFramesFloor Cross BeamSeat TracksBulkheadBaggage DoorAccess DoorsKeel BeamCanopy BeamsSeat AssembliesWindows Frames
COCKPITWindow FramesDashboardCenter Pedestral & Sides
Engine Mount AssyEngine Attach Pylon FittingWing Attach Pylon FittingTitanium RibsPanelsEngine Pylon Assemblies
SYSTEMSVentilation ImpellerFuel Pipe Connectors
LANDING GEARTorque LinksTowing FittingDoors Goose Necks Fitting assemblies
Nacelle & Thrust reverser & EngineRingBeams & FramesEquipmentsSuspension CaseBladesFlow Splitter
DOORSStructureMechanismsHingesFittings
Frame 1 – A380
8ft (2500mm)
Frame 42 – A320
13ft (4000mm)
Frame 16 – A380 Nose Landing Gear Box
16ft (4900mm)
5ft (1500mm)
Back to menu
Back to menu
Floor Assy T15 – A330 PAX Floor Assy T15 – A330 GMF
20ft (6000mm)
8ft (2500mm)
Floor Assy Section 12 A350 XWB(Design and built contract)
12.16ft (3800mm)
16.22ft (5070mm)
Back to menu
Wing Spar - G650Outboard Rear
Spar G65036ft long
Outboard Front Spar G65042ft long
Outboard Aft Spar - G650
Wing Skin Legacy 450
Vertical Stabilizer Skin FALCON 900/2000
30ft (9000mm)
Wing skin – FALCON 900/2000
Wing skin Machining + Forming
Elevator Panel Falcon 900/2000
12ft (3650mm)
Machining + Forming
Attachment FittingATR 42/72
Flap Track Titanium - RAIL
ERJ190
Flap Track Titanium - RAIL
LEGACY 450 EMBRAER
43’’x16’’ (1100mm x 400mm)
Back to menu
Titanium Panel – A350
Compositi
Compositi
Compositi
Compositi
Comportamento a fatica
Problematica