

Acoustic Emission (AE)
Public NDT
Active 4 weeks ago
Acoustic emission (AE) is the phenomenon of radiation of acoustic (elastic) waves in solids that occurs... View more
Public NDT
Public NDT
Group Description
Acoustic emission (AE) is the phenomenon of radiation of acoustic (elastic) waves in solids that occurs when a material undergoes irreversible changes in its internal structure, for example as a result of crack formation or plastic deformation due to aging, temperature gradients or external mechanical forces. In particular, AE is occurring during the processes of mechanical loading of materials and structures accompanied by structural changes that generate local sources of elastic waves. This results in small surface displacements of a material produced by elastic or stress waves generated when the accumulated elastic energy in a material or on its surface is released rapidly. The waves generated by sources of AE are of practical interest in structural health monitoring (SHM), quality control, system feedback, process monitoring and other fields. In SHM applications, AE is typically used to detect, locate and characterise damage.
difference between UT and AE
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difference between UT and AE
Posted by william on 27/11/2021 at 2:43 pmwhat is difference between UT an AE in advantages and disadvantages and applications?
jaden replied 5 months, 3 weeks ago 2 Members · 1 Reply -
1 Reply
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1 Point::
(I hope that experts will answer your question better than I can do, but I will tell you my opinion.
AE method can inspect large structures more easy than UT because it is not necessary to scan a large structure with a lot of manpower. I guess you know that AE sensor listen waves that are generated from the source (crack) that teavelling through the structure. AE method detects a crack a bit late since the crack must be already big enough to generate waves. For this reason the structure is often stressed by load that stimulates the cracks to generates waves. AE method domain is monitoring of structures (e.g. bridges) during operation.I hope that my opinion is in principle right. I just wanted to get the ball runing. I sure that experts can answer more complete and better than I did.)
For more details you should study the papers in the archive especially the seven volumns of EWGAE proceedings