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On the use of Acoustic Emission as a laboratory tool for investigating mixed-elastohydrodynamic contacts

Clarke, Alastair, Hutt, Simon and Evans, Henry 2018. On the use of Acoustic Emission as a laboratory tool for investigating mixed-elastohydrodynamic contacts. Presented at: STLE Annual Meeting 2018, Minneapolis, 20-24 May 2018.

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Abstract

Acoustic Emission (AE) has been long established as a sensitive tool for detecting damage and failure in engineering structures, where sensors are used to detect the elastic stress waves originating from crack growth, impact damage, plastic deformation and other failure mechanisms. This paper examines the sensitivity of AE to mixed lubrication conditions, with a view to evaluating the technique for monitoring heavily loaded power transmission gear systems where roughness scale fatigue phenomena such as micropitting are a problem. Experiments were conducted using a power-recirculating twin disc rig designed to investigate EHL contacts. Contact conditions were controlled in order to operate at a range of lubrication conditions from full film to heavily mixed lubrication. AE was found to be sensitive to contact conditions in particular frequency bands, in particular to the level of asperity contact, and a general relationship between AE and lambda ratio was determined for these results

Item Type: Conference or Workshop Item (Paper)
Status: Unpublished
Schools: Engineering
Subjects: T Technology > TJ Mechanical engineering and machinery
Last Modified: 30 May 2019 21:28
URI: http://orca.cf.ac.uk/id/eprint/115516

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