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Ultrasonic monitoring of friction contacts during shear vibration cycles
File(s)
OA Location
Author(s)
Fantetti, Alfredo
Mariani, Stefano
Pesaresi, Luca
Nowell, David
Cegla, Frederic
Type
Journal Article
Abstract
Complex high-value jointed structures such as aero-engines are carefully designed and optimized to prevent failure and maximise their life. In the design process, physically-based numerical models are employed to predict the nonlinear dynamic response of the structure. However, the reliability of these models is limited due to the lack of accurate validation data from metallic contact interfaces subjected to high-frequency vibration cycles. In this study, ultrasonic shear waves are used to characterise metallic contact interfaces during vibration cycles, hence providing new validation data for an understanding of the state of the friction contact. Supported by numerical simulations of wave propagation within the material, a novel experimental method is developed to simultaneously acquire ultrasonic measurements and friction hysteresis loops within the same test on a high-frequency friction rig. Large variability in the ultrasound reflection/transmission is observed within each hysteresis loop and is associated with stick/slip transitions. The measurement results reveal that the ultrasound technique can be used to detect stick and slip states in contact interfaces subjected to high-frequency shear vibration. This is the first observation of this type and paves the way towards real-time monitoring of vibrating contact interfaces in jointed structures, leading to a new physical understanding of the contact states and new validation data needed for improved nonlinear dynamic analyses.
Date Issued
2021-12-01
Date Acceptance
2021-04-10
Citation
Mechanical Systems and Signal Processing, 2021, 161
URI
DOI
ISSN
0888-3270
Publisher
Elsevier
Journal / Book Title
Mechanical Systems and Signal Processing
Volume
161
Copyright Statement
© 2021 The Author(s). Published by Elsevier Ltd. his is an open access article under the CCBY license (http://creativecommons.org/licenses/by/4.0/).
License URL
Subjects
Acoustics
0905 Civil Engineering
0913 Mechanical Engineering
0915 Interdisciplinary Engineering
Publication Status
Published
Article Number
ARTN 107966
Date Publish Online
2021-04-28