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Potential of fibre metal laminates in root joints of wind energy turbine rotor blades

Petersen, Enno and Englisch, Nils and Brand, L.-M. and Mahrholz, Thorsten and Hühne, Christian (2022) Potential of fibre metal laminates in root joints of wind energy turbine rotor blades. In: Science of Making Torque from Wind, TORQUE 2022, 2265 (3). The Science of Making Torque from Wind (TORQUE 2022), 2022-06-01 - 2022-06-03, Delft, Netherlands. doi: 10.1088/1742-6596/2265/3/032039. ISSN 1742-6588.

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The length of rotor blades is showing continuous growth for future wind energy turbines leading to high bending moments, which must be transferred to the hub by the root section. As the growth of the root diameter is limited by factors such as transportability, motivation to improve the load carrying capacity without changing the geometry is high. Hybridisation with metals shows a possibility to intrinsically increase the bearing strength of fibre-reinforced plastics. This publication presents experimental investigations into hybrid laminates to be used in so-called T-joints for connecting rotor blades to the hub of the nacelle of a wind energy turbine. An overview is given about the bearing strength of several material combinations hybridising glass- and carbon fibre-reinforced plastics (GFRP, CFRP) with aluminium, titanium and steel alloys. A GFRP-steel-hybrid can be identified as a material with a high reinforcing effect even for low amounts of steel. A hybrid T-joint demonstrator is manufactured by resin infusion and tested under static tension. In comparison with a GFRP reference, a joining strength increase of about 33% is achieved for a steel content of 3%. Further coupon level tests reveal a weak spot in the transition zone between the monolithic GFRP region and full hybrid region as the static and fatigue resistance clearly decreases in comparison with monolithic GFRP and full hybrid references.

Item URL in elib:https://elib.dlr.de/187198/
Document Type:Conference or Workshop Item (Speech)
Title:Potential of fibre metal laminates in root joints of wind energy turbine rotor blades
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Petersen, EnnoUNSPECIFIEDhttps://orcid.org/0000-0002-1488-5618UNSPECIFIED
Mahrholz, ThorstenUNSPECIFIEDhttps://orcid.org/0000-0003-1488-0910UNSPECIFIED
Hühne, ChristianUNSPECIFIEDhttps://orcid.org/0000-0002-2218-1223UNSPECIFIED
Journal or Publication Title:Science of Making Torque from Wind, TORQUE 2022
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Series Name:Journal of Physics: Conference Series
Keywords:fibre metal laminate, hybrid laminate, T-joints, bearing strength, static and fatigue test, transition zone, GFRP, CFRP
Event Title:The Science of Making Torque from Wind (TORQUE 2022)
Event Location:Delft, Netherlands
Event Type:international Conference
Event Start Date:1 June 2022
Event End Date:3 June 2022
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Photovoltaics and Wind Energy
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Wind Energy
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Mahrholz, Dr.rer.nat. Thorsten
Deposited On:04 Jul 2022 04:48
Last Modified:24 Apr 2024 20:48

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