Observations on acoustic emissions from a line contact compressed into the plastic region. (November 2016)

• Record Type: Journal Article
• Authors: Fuentes, Ramon; Howard, Thomas P; Marshall, Matthew B; Cross, Elizabeth J; Dwyer-Joyce, Rob S
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 230:Number 11(2016:Nov.)
• Page Start: 1371
• Page End: 1376
• Publication Date: 2016-11
• Subjects: Acoustic emissions -- condition monitoring; Tribology -- Periodicals; 621.89
• DOI: 10.1177/1350650116638590
• Languages: English
• ISSNs: 1350-6501

Abstract

Some observations from acoustic emissions recorded during a yield test of a bearing raceway compressed into plasticity using a rolling element are presented. The general objective of the study is to establish whether there is enough evidence of the onset of sub-surface plasticity in the acoustic emissions signature. It is discussed here how acoustic emissions monitoring during compression could indicate the onset of subsurface plasticity as a precursor to damage propagation to the surface. Some comparisons are drawn between the acoustic emissions activity levels and time-frequency response during elastic deformation and at yield loads.