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Hebri
Teacher, NDT inspection
Aïn Temouchent university, Oran, Algeria, Joined Mar 2013, 4

Hebri

Teacher, NDT inspection
Aïn Temouchent university, Oran,
Algeria,
Joined Mar 2013
4
12:26 Oct-02-2016
Acoustic Emission Source Identification in Pipes Using Finite Element Analysis
Overall

Hello,
I find this work interesting. In this work can we say that we are measuring the lamb wave?

 
 Reply 
 
P V SASTRY
R & D, NDT tecniques metallurgy
TAKEN VRS FROM THE POSITION OF SR. DEPUTY GENERAL MANAGER BHEL CORPORATE R&D, India, Joined Jan 2003, 195

P V SASTRY

R & D, NDT tecniques metallurgy
TAKEN VRS FROM THE POSITION OF SR. DEPUTY GENERAL MANAGER BHEL CORPORATE R&D,
India,
Joined Jan 2003
195
02:27 Oct-03-2016
Re: Acoustic Emission Source Identification in Pipes Using Finite Element Analysis
In Reply to Hebri at 12:26 Oct-02-2016 (Opening).


Dear Sir,

The classic definition of Acoustic Emission (AE) refers to the generation of transient elastic waves in the form of stress waves.

These stress waves can be originated from deep in the components (other than the pipes) having considerable thicknesses and are propagated in all directions. Eventually they reach the surface and can travel several meters and are picked up by the sensors.

When they reach the surface and propagate they can certainly be treated as Lamb waves but not very sure before they reach the surface from several centimeters from inside the component.

Best wishes

P V SASTRY

 
 Reply 
 
Hebri
Teacher, NDT inspection
Aïn Temouchent university, Oran, Algeria, Joined Mar 2013, 4

Hebri

Teacher, NDT inspection
Aïn Temouchent university, Oran,
Algeria,
Joined Mar 2013
4
13:57 Oct-03-2016
Re: Acoustic Emission Source Identification in Pipes Using Finite Element Analysis
In Reply to P V SASTRY at 02:27 Oct-03-2016 .

Dear Sir,
Thank you for your fast response. I have other questions about this article.
- Why the force is spread over a surface area, and in which direction the force is applied?
- can we do that with a concentrated force?
- If we applied the force not perpendicular to the surface, I mean with an angle, I think we will deal with a lamb wave?

thank you again

 
 Reply 
 

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