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TRANSCRIPT
Institute of Composite Structures and Adaptive Systems
Hybridisierungsansätze
für
Faserverbundbauteile
B. Wieland, M. Kleineberg
www.DLR.de • Folie 2 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Content
What means Hybrid
Hybridization Strategies
Examples
Outlook
Summary
www.DLR.de • Folie 3 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
What means Hybrid?
Mixture of different materials with specific
properties combined during processing
What you want:
Powerful combination of all strengths
while avoiding specific weaknesses
What you might get:
Generation of even less applicable combinations
because strengths got lost and weaknesses
remained
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www.DLR.de • Folie 4 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
What means Hybrid
Hybridization Strategies
Examples
Outlook
Summary
www.DLR.de • Folie 5 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Hybridization Strategies
Plastics
Metal Non- metallic
materials
Fiber
Layer
Insert Particle
Foam
Material type Semi- finished material
www.DLR.de • Folie 6 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Hybridization Strategies – Specific Characteristics
Particles and Foams
Continuous Fiber
Composites
Non metallic particles
Metal Particles
Polymer Foam
Metallic Foam
+ Tailored matrix properties
- Viscosity, quality assurance
+ Thermal and electrical conductivity
- Filtration effects
+ Tailored performance, process aid
- Bond line, resin uptake
+ Support structure with metal properties
- Tailoring of cell structure, resin uptake
www.DLR.de • Folie 7 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Hybridization Strategies – Specific Characteristics
Layers and Elements
Continuous Fiber
Composites
Thermoplastic
/Elastomer
Sheet Metal
Metal
Components
+ Recycling, thermoforming
- Microstructure, creeping
+ In-Plane performance, conductivity
- Thermal compatibility, surface
preparation, corrosion
+ Combination of properties
- High Interface loads, corrosion
Active Elements + Additional functions
- compatibility
www.DLR.de • Folie 8 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Hybridization Strategies – Specific Characteristics
Fibers and processes
Continuous Fiber
Composites
Short and Long
Fibers
Continuous Fibers
2D/3D Fiber
Products
+ Recycling product
- Very limited performance
+ Tailored performance
- Process management, compatibility
+ Higher lay-up rates, complex surfaces
- Reduced performance, handling
High/Low Viscosity
Thermoset
+ Reduction of material and process
costs
- Additional process steps, performance
www.DLR.de • Folie 9 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
What means Hybrid
Hybridization Strategies
Examples
Outlook
Summary
www.DLR.de • Folie 10 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Example: Particles and Foam
Flame protection with nanoparticles
Intention:
Aluminiumtrihydroxid Nanoparticles
(ATH) are cooling flue gases
Delay of inflammation
Slowing down of flame spread
Reduction of heat transfer 5% ATH
Nanopartikel
10% ATH
Nanopartikel
20% ATH
Nanopartikel
Structural conform integration of
sensor layers
Intention:
Design of new materials to implement
sensor layers in laminates
www.DLR.de • Folie 11 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Example: Particles and Foam
Radar Absorbent Material for
wind turbine blades
Intention:
Minimize the impact of wind
tubines on ATC-
Radarsystems. Integration of
particle like Carbon,
Polyaniline and Ferrite
GRE GRE
Absorbing Layer
www.DLR.de • Folie 12 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Example: Layers and Elements
Thermoset/Thermoplastic- Hybrid
Intention:
Combination of a thermally activated,
contamination resistant bond line with
thermally and chemically resistant
structural thermoset components
Thermoset Prepreg
PEI-Bondline
PEEK Stringer
977-2 Prepreg Skin
PEI Interface
Interphase
www.DLR.de • Folie 13 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Example: Layers and Elements
CFRP/Sheet Metal –Hybrid (Protection)
Intention:
Wear resistant very thin outer metal sheet
is combined with multifunctional, light
weight CFRP substructure to provide a
thermally compatible abrasion resistant
leading edge
www.DLR.de • Folie 14 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Example: Layers and Elements
Perforated erosion shield
Porous or perforated CFRP
substrate
Co-cured load carrying and
pressurized CFRP substructure
Perforated metallic heating layer
Defined porosity through removed
additional material
Random porosity through
specialized process parameters
www.DLR.de • Folie 15 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Example: Layers and Elements
Segmented LM23.3 with T-bolts
Root section of rotor blades
for wind turbines
Intention: reduction of material
at root section, improvement
of bonding line
Split rotor blades
Reduction of Blade length
because of logistic reasons.
Joint should be weight
efficient and robust.
www.DLR.de • Folie 16 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Example: Fibers and Processes
CFRP/GFRP/Foam-Hybrid Rotor blade
Intention:
Cost efficient design. Performance induced
material selection
www.DLR.de • Folie 17 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Example: Fibers and Processes
Thermoset Prepreg / Infusion - Hybrid
Intention:
Combine toughness and automated lay-up
options of prepreg products with drapability
and cost efficiency of infiltrated dry fiber
products
www.DLR.de • Folie 18 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
What means Hybrid
Hybridization Strategies
Examples
Outlook
Summary
www.DLR.de • Folie 19 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Outlook
Integrated Elastomere Hinge Integrated Elastomere-Area
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Outlook
Bio Fiber /CFRP Composite for
ecological product design Integrated LED’s and Solar Cells
with embedded electrical wiring and
suitable connectors
www.DLR.de • Folie 21 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
What means Hybrid
Hybridization Strategies
Examples
Outlook
Summary
www.DLR.de • Folie 22 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Summary and conclusion
• The bandwidth of hybrid solutions is extremely wide
• Many composite related challenges can be addressed with hybrid
approaches.
• Hybrid solutions do require globally or even locally adapted process
• Further improve the understanding of manufacturing processes are
deeded
• Recycling of hybrid components should be included in research
activities.
www.DLR.de • Folie 23 > Faserverbundtechnologie > Dipl.-Ing. B. Wieland
Dipl.-Ing Birgit Wieland Deutsches Zentrum
für Luft- und Raumfahrt
Faserverbundtechnologie Institut für Faserverbund-
leichtbau und Adaptronik
Lilienthalplatz 7
38108 Braunschweig
Telefon 0531 295-2911
E-Mail [email protected]
Internet www. DLR.de/FA/