Testing wind turbine blade adhesive joints
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The majority of composite wind turbine blades contain adhesive joints. If a composite joint is properly designed, the adhesive can play a very beneficial role as its compliance allows for dimensional mismatch, such as from thermal expansion, and reduces stress concentrations at locations where elastic modulus mismatch is present. For all blades, defects or cracking between composite plies/delaminations, or in the vicinity of geometry changes, can occur
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