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Condition monitoring and testing of piezo elements for the activation of guided Lamb waves & damage identification using ultrasound scanning

Molder, D A M te (2016) Condition monitoring and testing of piezo elements for the activation of guided Lamb waves & damage identification using ultrasound scanning.

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Abstract:Industry has a growing interest in structural health monitoring (SHM) of large structures to reduce maintenance time and preventing unnecessary replacement cost. Small impacts by ground collision or maintenance duties can cause delamination, crack initiations or cracks of structural parts, resulting in significantly structure weakening. Recording and analysing activated Lamb waves utilizing piezo electric wafer (PWAS) in thin panel structures is an accurate method of damage identification in composite structures. However, a deeper understanding of factors influencing the wave propagation through the material is required to improve the signal and the applicability for industry purposes. Experiments were performed to test the influence of different piezo elements and material structures on the wave propagation. Secondly, a self-diagnostic method is tested to monitor the condition of the piezo elements itself. The impact damage created on the test panel is identified by ultrasound scanning.
Item Type:Internship Report (Master)
Clients:
University Auckland, New Zealand
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Link to this item:http://purl.utwente.nl/essays/71928
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