Article | REF: IN226 V1

Monitoring of fatigue of materials from acoustic emission

Authors: Stéphanie DESCHANEL, Jérôme WEISS

Publication date: December 10, 2018, Review date: January 13, 2021

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2. Acoustic emission: reminders and definitions

Acoustic emission (EA) corresponds, according to the AFNOR standard , to a "phenomenon of elastic energy release in the form of transient elastic waves within a material during dynamic deformation processes". A material subjected to inelastic deformation dissipates energy by creating micro-displacements of material, a fraction of which take the form of elastic waves, if these deformations are carried out abruptly.

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Acoustic emission: reminders and definitions