Monitoring crack propagation in turbine blades caused by thermosonic inspection
Bolu, G. and Gachagan, A. and Pierce, G. and Harvey, G. and Choong, L.; (2010) Monitoring crack propagation in turbine blades caused by thermosonic inspection. In: REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION. American Institute of Physics, USA, p. 1654. ISBN 978-0-7354-0748-0
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High power acoustic excitation of components during a thermosonic (or Sonic IR) inspection may further propagate existing cracks. Monitoring such changes through destructive or non-destructive means is no trivial task. Process Compensated Resonance Testing (PCRT) technology offers the capability to monitor the growth of fatigue-induced cracks (and other progressive defects) through statistical analysis of changes in a components resonant spectra over time. This technique can be used to detect changes in material properties by comparing a components spectra to itself at regular intervals after systematic exposure to high power excitation associated with thermosonic inspection. In this work, the resonant spectra of 6 cracked and 6 uncracked turbine blades are captured prior to batch of inspections. Next, these spectra are analysed using proprietary software for changes in resonant behaviour. Results from this work indicate that a typical thermosonic inspection of a turbine blade for crack detection does not cause crack propagation or degrade a blades structural integrity.
Creators(s): |
Bolu, G., Gachagan, A. ![]() ![]() | Item type: | Book Section |
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ID code: | 30852 |
Keywords: | crack propagation, turbine blades, thermosonic inspection, high power acoustic excitation, process compensated resonance testing, fatigue-induced cracks, resonant behaviour, Electrical engineering. Electronics Nuclear engineering |
Subjects: | Technology > Electrical engineering. Electronics Nuclear engineering |
Department: | Faculty of Engineering > Electronic and Electrical Engineering |
Depositing user: | Pure Administrator |
Date deposited: | 06 May 2011 10:59 |
Last modified: | 01 Jan 2021 06:35 |
Related URLs: | |
URI: | https://strathprints.strath.ac.uk/id/eprint/30852 |
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