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Sonatest Ltd
From our three distinct business centres in the UK, USA and CANADA, Sonatest design and produce a leading range of high performance ultrasonic NDT equipment and accessories.

978 views
08:27 Jun-20-2001
Mokhtar
NDT for Composite

I would like to know the best laboratory NDT methods to inspect composite(PMC).

Thank you.


 
09:13 Jun-20-2001

David

Student, Research Assistant
National University of Malaysia,
Malaysia,
Joined Jan 2000
4
Re: NDT for Composite : I would like to know the best laboratory NDT methods to inspect composite(PMC).
.
: Thank you.
.

Pulse echo ultrasonic method. Normal probe, direct contact.
Frequency range depends on your material thickness also.


 
02:36 Jun-21-2001
mokhtar
Re: NDT for Composite : : I would like to know the best laboratory NDT methods to inspect composite(PMC).
: .
: : Thank you.
: .
.
: Pulse echo ultrasonic method. Normal probe, direct contact.
: Frequency range depends on your material thickness also.
.

Dear Mr David,
What about immersion technique? Let's say a have glass fibre and thickness is 5mm: What frequency should the probe be?

Thank you.


 
09:47 Jun-21-2001

David

Student, Research Assistant
National University of Malaysia,
Malaysia,
Joined Jan 2000
4
Re: NDT for Composite Immersion technique has its own advantages but the
choice is yours. If the test material can be soaked
into liquid unconditionally, you can proceed with it.
Since your material is relatively thin and considering
that the material is a glass fibre reinforced composite,
the frequency range can be around 0.5MHz to 2MHz.
The selection is fairly at your discretion. Thank you.

All the best, David, N.V.


 
01:37 Jun-21-2001

A. Mucciardi

Engineering, -
SLX, Inc.,
USA,
Joined Jan 2000
3
Re: NDT for Composite : Immersion technique has its own advantages but the
: choice is yours. If the test material can be soaked
: into liquid unconditionally, you can proceed with it.
: Since your material is relatively thin and considering
: that the material is a glass fibre reinforced composite,
: the frequency range can be around 0.5MHz to 2MHz.
: The selection is fairly at your discretion. Thank you.
.
: All the best, David, N.V.
.

SLX manufactures a tunable filter unit, the Noise Suppressor II, that adds on to any existing UT instrument. The dual tunable Filters (including a PreAmp) can significantly increase the S/N ratio for components possessing either small defects, or highly attenuative grain structure, or both. The NSII comes in four models, each operating in a different, and overlapping, frequency range. One of these models, NSII-L, operates in the 0.5 to 2.4 MHz range which appears to be the band of interest in this application. Details of this inexpensive, add-on instrument can be found at www.SLX-inc.com .

Regards, Tony





 
08:36 Jun-26-2001
Jeff Leak
Re: NDT for Composite : I would like to know the best laboratory NDT methods to inspect composite(PMC).
.
: Thank you.


I have been inspection composite materials for about 11 years, at NASA's Marshall Space Flight Center. I typically use 5Mhz, 0.0250"dia probes, in a Type I immersion bath.

Generally, I inspect the composite panels in a thru-transmission mode, looking for the "bulk-attenuation" of the panel. We get a "plan-view" C-Scan image.

Jeff



 
03:16 Jul-29-2001
Songping Liu
Re: NDT for Composite We have developed a very high resolution RF ultrasonic evaluation technique specially for fiber reinforced composites. It is very useful and smart for applications in laboratory or field for composites.

Thanks

Songping Liu
Ph.D, director of the center for NDT&E
Beijing Aeronautical Manufacturing Technology Research Institute (BAMTRI)
Beijing 100024, P.R. China
E-mail: liusping@public.fhnet.cn.net
Tel: 86-10-65761731-2296(Office)
Fax: 86-10-65762306




 
02:08 Dec-18-2002
ozan esen
NDT for Composite I'm the studen at civil aviation school in Turkey.. Could you please send me some text about "ndt for composites".. thank you..


 


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