Title: Application of acoustic emission method in contact damage identification

Authors: P. Mazal, J. Dvoracek, L. Pazdera

Addresses: Faculty of Mechanical Engineering, Institute of Machine and Industrial Design, Brno University of Technology, Technicka 2, CZ 616 69 Brno, Czech Republic. ' Faculty of Mechanical Engineering, Institute of Machine and Industrial Design, Brno University of Technology, Technicka 2, CZ 616 69 Brno, Czech Republic. ' Faculty of Civil Engineering, Institute of Physics, Brno University of Technology, Veveri 95, CZ 602 00, Brno, Czech Republic

Abstract: The contribution summarises the experimental experience of authors with acoustic emission method application in the area of improved bearing materials contact damage stages identification on testing stations Axmat and R-mat types. The paper is focused also on the first experimental results received from measurements on real axial bearings. These results proved the acoustic emission (AE) technique enables reliable recognition of running-in period, stabilised run and exact definition of origin stage of material surface damaging, leading to the pitting. It is proposed that the direction of AE analysers utilisation not only in research area, but the AE technique may be successfully used even in industrial practice. Method of acoustic emission may offer another possibility of deepening of diagnostics of real actual state of bearing; it is, without doubt, one of new perspective areas of automated diagnostics.

Keywords: automated diagnostics; vibration; acoustic emission; contact fatigue; contact damage; pitting; bearing steel; axial bearings; AE count; AE event; surface damage; fault diagnosis; nondestructive testing; NDT.

DOI: 10.1504/IJMPT.2011.040292

International Journal of Materials and Product Technology, 2011 Vol.41 No.1/2/3/4, pp.140 - 152

Published online: 28 Feb 2015 *

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