Anand Natarajan Senior Scientist Wind Energy Department, Risø DTU Denmark
Hybrid composite materials for wind turbine blades...2 October 2019, Wind Energy Denmark, Herning,...
Transcript of Hybrid composite materials for wind turbine blades...2 October 2019, Wind Energy Denmark, Herning,...
2 October 2019, Wind Energy Denmark, Herning, Denmark
Bo Madsen
Section of Composite Materials
Department of Wind Energy
Technical University of Denmark
Hybrid composite materials for
wind turbine blades
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Hybrid composites
More than one type of reinforcement fibresin a common matrix
Fibre A Fibre B Matrix Hybrid composite
More optimal design of composite properties
to meet specific performance profile
Potential synergetic effect (so-called hybrid effect)
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Glass fibre/carbon fibre hybrid composites
Carbon fibres
Glass fibres
20 m
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Properties of glass and carbon fibres
Glass fibres Carbon fibres
Stiffness = 80 GPa
Strength = 3700 MPa
Density = 2.7 g/cc
Low cost
Stiffness = 200 GPa
Strength = 4700 MPa
Density = 1.8 g/cc
High cost
DTUDate Title 6
Previous projects at DTU Wind Energy
working with hybrid composites
Blade King, 2009 – 2013
LM Wind Power, Comfil, Aalborg University, DTU Wind Energy
To develop faster and more cost effective manufacturing of wind turbine blades
OptiMaDeBlade, 2015 – 2018
LM Wind Power, Fiberline, Aalborg University, DTU Wind Energy
To optimise production of wind turbine blades to lower the cost for offshore wind energy
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In 2016, world’s largest wind turbine blade,
88 meter, 34 tonnes8 MW turbine
Hybrid composites, glass and carbon fibres
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Hybrid fibre mixing ratio,
Composition of hybrid composites
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Hybrid fibre weight mixing ratio,
Carbon fibres
Glass fibres
Matrix
Experimental data and model predictions
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Hybrid fibre weight mixing ratio,
Carbon fibres
Glass fibres
Matrix
Experimental data and model predictions
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Hybrid fibre weight mixing ratio,
Carbon fibres
Glass fibres
Matrix
Model curves under the assumption of constant local
fibre volume fractions in hybrid composites
Experimental data and model predictions
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g/cm
3]
Hybrid fibre weight mixing ratio,
Density
Performance of hybrid composites
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cm^3
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Hybrid fibre weight mixing ratio,
Stiffness per weight
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Pa/(
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Hybrid fibre weight mixing ratio,
Stiffness per cost
Performance of hybrid composites
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Rule-of-mixtures model for composite strength
Brittle phase
Ductilephase
Single fracture
Multiple fracture
Envelope of stress-strain curves
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Rule-of-mixtures model for composite strength
No hybrid effect Hybrid effect
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Experimental data and model predictions
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New project on hybrid composites