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Conference papers

Monitoring of a Full-Scale Wing Fatigue Test

Abstract : A wing of a decommissioned aircraft of the Royal Netherlands Air Force (RNLAF) was fatigue tested to more than two times the design life. Part of the test was the evaluation of load monitoring and Structural Health Monitoring (SHM) techniques. For load monitoring the data of conventional resistance strain gauges was compared with the response of optical Fibre Bragg Gratings (FBG). For SHM the Acoustic Emission (AE) and Comparative Vacuum Monitoring (CVM) techniques were employed to monitor fatigue crack initiation and growth. With the optical fibres a linear correlation between the FBGÕs and the conventional strain gauges was obtained using a specific strain transfer factor. The SHM techniques, on the other hand, were less successful. For the CVM technique no cracks occurred at the locations under periodic monitoring (but also no false calls occurred during the complete test). Further, the AE system under continuous monitoring registered a lot of AE activity from different sources (also after drastic filtering of the AE data) but the AE data could not be reliably related to the initiation and growth of fatigue cracks in the areas monitored. Most of the AE activity was probably caused by mechanically induced noise such as frictional noise from the fastener locations and other surface rubbing areas.
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Submitted on : Tuesday, July 8, 2014 - 9:41:27 AM
Last modification on : Tuesday, July 8, 2014 - 10:31:31 AM
Long-term archiving on: : Wednesday, October 8, 2014 - 11:20:50 AM


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  • HAL Id : hal-01020303, version 1



Jaap Heida, Jason Hwang. Monitoring of a Full-Scale Wing Fatigue Test. EWSHM - 7th European Workshop on Structural Health Monitoring, IFFSTTAR, Inria, Université de Nantes, Jul 2014, Nantes, France. ⟨hal-01020303⟩



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