DTU Space Carbon Fiber Reinforced Plastic and CFRP projects. Niels Christian Jessen Hans Ulrik Nørgaard-Nielsen
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1 DTU Space Carbon Fiber Reinforced Plastic and CFRP projects Niels Christian Jessen Hans Ulrik Nørgaard-Nielsen
2 Why CFRP + Material properties can be designed + High Specific Stiffness Young's module / Density + High Thermal Stability Thermal Conductivity / Coefficient of Thermal expansion + High Strength Ultimate strength / Density - Moisture sensitive - Radiation - Outgassing 2 DTU Space, Technical University of Denmark
3 CFRP Manufacturing methods Filament Winding Prepreg Woven mesh Prepreg Injector molding 3 DTU Space, Technical University of Denmark
4 Micro Mechanics Variables of Lamina UD UniDirectional Layer Fiber type Matrix Fiber Volume 4 DTU Space, Technical University of Denmark
5 Macro Mechanics Fiber lay up o Angles o Number of layers o Combination of Lamina layers Laminate program FEM 5 DTU Space, Technical University of Denmark
6 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 6 DTU Space, Technical University of Denmark
7 Behavior of lay up in Laminate Bending: stiff Torsion: soft Bending: soft Torsion: Stiff 7 DTU Space, Technical University of Denmark
8 Quasi isostropic Lay up In Plane: o Equal mechanical properties in all directions. Layers 1-60⁰ 2 0⁰ 3 60⁰ Remember symmetry for plates Layers 1 45⁰ 2 0⁰ 3-45⁰ 4 90⁰ Out of Plane: o Different properties since dominates by matrix material Remember symmetry for plates 8 DTU Space, Technical University of Denmark
9 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) 9 DTU Space, Technical University of Denmark
10 Planck Mapping the Cosmic Microwave Background anisotropies with improved sensitivity and angular resolution 10 DTU Space, Technical University of Denmark
11 Planck Satellite 11 DTU Space, Technical University of Denmark
12 Planck Satellite Reflectors ESA Project: DTU Space: Principal Investigator for the Reflector system. 74 detectors. 9 frequencies GHz. Launch: May DTU Space, Technical University of Denmark
13 Planck CFRP-Reflectors Qualification Model Secondary Reflector in 3D measurement machine. Dimensions 1051mm x 1104mm. Weight 13.6 Kg. 13 DTU Space, Technical University of Denmark Flight Model Primary Reflector Shown in aluminizing plant. Dimensions 1556mm x 1887mm. Weight 29.2 Kg.
14 Design af reflektorer til Planck Skin. Honeycomb. 14 DTU Space, Technical University of Denmark
15 Planck Dimpling, Sandwich Nodes Elements. 15 DTU Space, Technical University of Denmark
16 Planck Influence 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 Gray. Dimpling 0.4 µm. New adhesive. 16 DTU Space, Technical University of Denmark
17 Planck Lift Of Lift Of May Kl. 10:12:07 Kourou French Guiana 17 DTU Space, Technical University of Denmark
18 James Web Space Telescope MIRI 6.5 m Space telescope. NASA/ESA Project. L2. 3 Instruments. Launch DTU Space, Technical University of Denmark
19 MIRI/JWST Infrared spectrograph MIRI A combined mid infrared camera and spectrograph covering wavelengths 5-27 µm. DTU Space: Responsible of the Primary Support Structure. 19 DTU Space, Technical University of Denmark
20 MIRI/JWST Primary 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 DTU Space, Technical University of Denmark
21 MIRI/JWST Primary 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. 21 DTU Space, Technical University of Denmark Out gassing.
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