dtu space carbon fiber reinforced plastic and cfrp projects
TRANSCRIPT
DTU SpaceCarbon Fiber Reinforced Plastic and CFRP projects
Niels Christian Jessen Hans Ulrik Nørgaard-Nielsen
January 31 2013NCJE HUNN
2 DTU Space, Technical University of Denmark
Why CFRP
+ Material properties can be designed
+ High Specific Stiffness Young's module / Density
+ High Thermal StabilityThermal Conductivity / Coefficient of Thermal expansion
+ High StrengthUltimate strength / Density
- Moisture sensitive
- Radiation
- Outgassing
January 31 2013NCJE HUNN
3 DTU Space, Technical University of Denmark
CFRP Manufacturing methods
Filament Winding
Prepreg
Woven mesh
Prepreg
Injector molding
January 31 2013NCJE HUNN
4 DTU Space, Technical University of Denmark
Micro Mechanics
Variables ofLaminaUD UniDirectionalLayer
• Fiber type• Matrix• Fiber Volume
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5 DTU Space, Technical University of Denmark
Macro Mechanics
• Fiber lay upo Angleso Number of layerso Combination of
Lamina layers
• Laminate program
• FEM
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Symmetric Lay Up
• Symmetric around center of Laminate avoids out of plane effects for plates.
• Tubes are special case
Post Curing shapes of
Unsymmetrical Laminates
January 31 2013NCJE HUNN
7 DTU Space, Technical University of Denmark
Behavior of lay up in Laminate
Bending: stiff
Torsion: soft
Bending: soft
Torsion: Stiff
January 31 2013NCJE HUNN
8 DTU Space, Technical University of Denmark
Quasi isostropic Lay up
• In Plane:o Equal mechanical
properties in all directions.
• Out of Plane:o Different properties
since dominates by matrix material
Layers
1 -60⁰
2 0⁰
3 60⁰
Remember symmetry for plates
Layers
1 45⁰
2 0⁰
3 -45⁰
4 90⁰
Remember symmetry for plates
January 31 2013NCJE HUNN
9 DTU Space, Technical University of Denmark
Space environments• Ultra high Vacuum
• Cooling only by radiation• Cavities must be avoided• Outgassing
• Extreme temperature• Cryo to very high temperatures• Dimensional Stability
• Radiation
• Static electricity
• Reliable• No possibilities for repair and adjustments
• Extreme launch loads• High g-loads (20 g and more not unusual in vibrations)
January 31 2013NCJE HUNN
10 DTU Space, Technical University of Denmark
Planck
•Mapping the Cosmic Microwave Background anisotropies with improved sensitivity and angular resolution
January 31 2013NCJE HUNN
11 DTU Space, Technical University of Denmark
Planck Satellite
January 31 2013NCJE HUNN
12 DTU Space, Technical University of Denmark
Planck Satellite Reflectors
ESA Project:
DTU Space:Principal Investigator for the Reflector system.
74 detectors.
9 frequencies.
30 – 857 GHz.
Launch: May 14 2009.
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PlanckCFRP-Reflectors
Qualification Model Secondary Reflector in 3D measurement machine.Dimensions 1051mm x 1104mm.Weight 13.6 Kg.
Flight Model Primary Reflector Shown in aluminizing plant.Dimensions 1556mm x 1887mm.Weight 29.2 Kg.
January 31 2013NCJE HUNN
14 DTU Space, Technical University of Denmark
Design af reflektorer til Planck
Skin.
Honeycomb.
January 31 2013NCJE HUNN
15 DTU Space, Technical University of Denmark
PlanckDimpling, Sandwich
666932 Nodes.486024 Elements.
January 31 2013NCJE HUNN
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PlanckInfluence from adhesive. Main expected Dimpling due to cool-down from Room Temperature to 41 K.
L20/SL, Aerosil Quarts Powder.Dimpling 2.4 µm.Original adhesive.
2216 Gray.Dimpling 0.4 µm.New adhesive.
January 31 2013NCJE HUNN
17 DTU Space, Technical University of Denmark
PlanckLift Of
Lift OfMay 14 2009Kl. 10:12:07KourouFrench Guiana
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18 DTU Space, Technical University of Denmark
James Web Space TelescopeMIRI
6.5 m Space telescope.
NASA/ESA Project.
L2.
3 Instruments.
Launch 2017.
January 31 2013NCJE HUNN
19 DTU Space, Technical University of Denmark
MIRI/JWSTInfrared spectrograph
MIRI
A combined mid infrared camera and spectrograph covering wavelengths 5-27 µm.
DTU Space:Responsible of the Primary Support Structure.
January 31 2013NCJE HUNN
20 DTU Space, Technical University of Denmark
MIRI/JWSTPrimary Support Structure
Design drivers:
Low thermal conductivity between the 7K cold instrument and the 35 K ’hot’ telescope.
Lowest Eigenfrequency above 60 Hz with a 103 Kg instrument.
Max g-load 20.
January 31 2013NCJE HUNN
21 DTU Space, Technical University of Denmark
MIRI/JWSTPrimary Support Structure Tests:
Thermal cycling from Room Temperature to 7 K.
Strength Test.
Vibration.
Material properties:
Young's module.
Coefficient of thermal expansion.
Coefficient of moisture expansion.
Thermal conductivity.
Out gassing.