Print Email Facebook Twitter Early detection of impact fatigue damage in an adhesively-bonded connection using acoustic emission Title Early detection of impact fatigue damage in an adhesively-bonded connection using acoustic emission Author Khoshmanesh, S. (TU Delft Wind Energy) Watson, S.J. (TU Delft Wind Energy) Zarouchas, D. (TU Delft Group Zarouchas) Date 2024 Abstract Wind turbine blades carry the risk of impact damage during transportation, installation, and operation. Such impacts can cause levels of damage that can propagate throughout the structure compromising performance and safety. In this study, the effect of impact damage on fatigue damage propagation in test specimens representative of a spar cap-shear web adhesively-bonded connection of a wind turbine blade was investigated. In addition, the effectiveness of using acoustic emissions to detect early impact-induced fatigue damage was studied. Three impact tests with increasing levels of energy were investigated. The results showed that for an impact test with an average energy of 16.32 J, the fatigue damage accumulation process was not influenced by the size and location of the impact damage. But for impact tests with an average energy of 23.68 J and 32.13 J, greater crack density and accelerated de-lamination and de-bonding of the adhesive from the laminate could be seen in the impact zone. Acoustic emission was shown to identify the position of the damage zone for the higher energy impact tests. It was also effective in showing the progressive accumulation of fatigue damage in this zone during the fatigue test. Subject Acoustic emissionAdhesive jointDamage detectionFatigueImpact To reference this document use: http://resolver.tudelft.nl/uuid:6938f524-6883-4271-a5f2-fbcb62a391bc DOI https://doi.org/10.1016/j.engstruct.2024.117973 ISSN 0141-0296 Source Engineering Structures, 308 Part of collection Institutional Repository Document type journal article Rights © 2024 S. Khoshmanesh, S.J. Watson, D. Zarouchas Files PDF 1-s2.0-S0141029624005352-main.pdf 13.11 MB Close viewer /islandora/object/uuid:6938f524-6883-4271-a5f2-fbcb62a391bc/datastream/OBJ/view