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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3. Acoustic emission fatigue testing: conventional methods

The idea of non-destructive testing of damage and fatigue cracking based on the detection of induced acoustic emissions is a long-standing one. , but based almost exclusively on analysis of the evolution of global variables, such as the average level of "noise" or acoustic energy recorded, or the number of blows dn c /dN or bursts (dn s )/(dN) per cycle, detected above a signal amplitude threshold. N is the number of loading cycles. This classic type of analysis, relatively easy to implement in principle, faces various problems:

  • a classic...

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Acoustic emission fatigue testing: conventional methods