GWO Blade Repair Training Standard V2.0
2021-04-01_TS_BR_V2
Learning objective:
The participants can describe the different types of fibreglass mats used in blades (Knowledge, basic level)
Training staff shall:
Define the terms ‘chopped strand’ (CS), ‘unidirectional’ (UD), ‘biaxial’ ( b iax), ‘triaxial’ ( t riax), ‘areal weight’ and ‘zero direction’ in relation to fibreglass mats used in composite laminate structures
Describe the terms ‘woven mat’ and ‘stitched mat’
Explain why stitched mats are used in wind turbine blades
Ask the participants relevant questions about the different terms used for describing fibreglass mats used in blade repair
The participants shall:
Describe in their own words and share their understanding of the different terms used for describing fibreglass mats used in blade repair
FIBRE ORIENTATION AND MOULDING THEORY
Learning objectives:
The participants can explain the importance of fibre orientation in a laminate structure (Knowledge, intermediate level) The participants can act independently in safely producing two 2-3-layer flat laminate panels covered on one side with gelcoat in accordance with a work instruction and drawing, creating one with epoxy and one with polyester resin systems and in accordance with a work instruction (Ability, intermediate level)
Training staff shall:
Explain the exercise and show the participants where the required materials and tools are stored
Using a flat aluminium mould, demonstrate how to prepare the mould surface with release agent and explain the purpose of the release agent and the drying time required before adding materials
Demonstrate how to mark out the 400mm by 300mm rectangle on the surface using flash tape
Demonstrate how to calculate the required amount of gelcoat for the marked-out mould area at a layer thickness of 0.8 mm Demonstrate how to correctly calculate, measure out and mix the separate components of the gelcoat and mention that there might be incompatible combinations of gelcoat and matrix systems. Demonstrate how to apply the gelcoat to the mould surface and how to distribute the gelcoat evenly on the mould
Demonstrate how to use a wet film gauge to determine the layer thickness
Global Wind Organisation www.globalwindsafety.org
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