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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
Specific detection of fatigue crack propagation
Bibliography
Standards and norms
- (Roget, J.) Essais non destructifs. L'émission acoustique, mise en œuvre et applications. AFNOR, CETIM Centre technique des industries mécaniques, 196 (1988). - Norme AFNOR NF A09-350 -
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