Print Email Facebook Twitter Combined Impact and Fatigue Loading in CFRP Title Combined Impact and Fatigue Loading in CFRP: Effects of the timing of an impact event during cyclic loading of composite aircraft structures Author van Diën, Casper (TU Delft Aerospace Engineering) Contributor Zarouchas, D. (mentor) Degree granting institution Delft University of Technology Programme Aerospace Engineering Date 2020-09-30 Abstract This research experimentally investigates the effects of an impact event during fatigue loading of a CFRP structure. Open-hole specimens were impacted in-situ during a short interruption of a tension-tension cyclic loading program. The impact was aimed directly below the central hole, with the critical fatigue damage path being left and right of this hole. A combination of digital image correlation (DIC), acoustic emission (AE) and C-scan measurements was used to measure the material response and damage patterns. The results indicate that while an impact caused the total amount of damage to increase as one would expect, its effect on the damage along the critical path depends on the timing of the impact. Only an impact before fatigue clearly accelerated fatigue damage accumulation leading to a shorter fatigue life. In contrast, impacting specimens at a later moment during fatigue loading had no effect on this critical damage accumulation. Subject CFRPFatigueImpactDICAcoustic emission To reference this document use: http://resolver.tudelft.nl/uuid:e53279d9-8b77-4e38-82ae-ac3367cbb3cb Part of collection Student theses Document type master thesis Rights © 2020 Casper van Diën Files PDF Thesis_CvDien_Final.pdf 71.79 MB Close viewer /islandora/object/uuid:e53279d9-8b77-4e38-82ae-ac3367cbb3cb/datastream/OBJ/view