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Technical Discussions
Trevor Easton
Engineering
Dofasco Inc, Canada, Joined Nov 1998, 13

Trevor Easton

Engineering
Dofasco Inc,
Canada,
Joined Nov 1998
13
02:26 Nov-29-2001
UT for laminates

I am looking for a device to detect delamination in a fibre product 0.120" thick
48" wide. Product is moving at 60ft/min on a belt conveyor. Any companies or suggestions?


 
 Reply 
 
Godfrey Hands
Consultant,
PRI Nadcap, United Kingdom, Joined Nov 1998, 307

Godfrey Hands

Consultant,
PRI Nadcap,
United Kingdom,
Joined Nov 1998
307
08:58 Nov-30-2001
Re: UT for laminates
: I am looking for a device to detect delamination in a fibre product 0.120" thick
: 48" wide. Product is moving at 60ft/min on a belt conveyor. Any companies or suggestions?
.

Trevor,
One possibility that comes to mind is Video Thermography, where a heat pulse (or continuous source) is put on the product, and a thermographic camera evaluates the resultant heat distribution, either on the same side as heat source or opposite side.
Don't know who in your area does this, but web search should help you.

Regards,

Godfrey


 
 Reply 
 
Dave Forsyth
R & D
TRI/Austin, USA, Joined Nov 2001, 41

Dave Forsyth

R & D
TRI/Austin,
USA,
Joined Nov 2001
41
03:21 Nov-30-2001
Re: UT for laminates
I would be concerned that the thermal response of the material may not be fast enough, if it is moving on a line at 60ft/second. If that is indeed the case, noncontact ultrasonic methods would seem to be appropriate. Since you are in Canada so I would encourage you to contact my colleagues in Montreal:

Jean-Pierre Monchalin
Group Leader
Process Modelling and Instrumentation, Optical Techniques
Industrial Materials Institute (IMI)
National Research Council Canada (NRC)
75 de Mortagne Blvd.
Boucherville, Quebec, J4B 6Y4
Telephone: (450) 641-5116 Fax: (450) 641-5106
Email: jean-pierre.monchalin@nrc.ca

They are very good at what they do.

Regards, Dave.

: : I am looking for a device to detect delamination in a fibre product 0.120" thick
: : 48" wide. Product is moving at 60ft/min on a belt conveyor. Any companies or suggestions?
: .
.
: Trevor,
: One possibility that comes to mind is Video Thermography,

(snipped)


 
 Reply 
 
Joe Buckley
Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT, United Kingdom, Joined Oct 1999, 528

Joe Buckley

Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT,
United Kingdom,
Joined Oct 1999
528
03:33 Nov-30-2001
Re: UT for laminates
: I am looking for a device to detect delamination in a fibre product 0.120" thick
: 48" wide. Product is moving at 60ft/min on a belt conveyor. Any companies or suggestions?
.

The speed will limit how complete a test you can manage, but large area delaminations should be detectable with air-coupled UT, using a plate-wave approach. (too fast to C-scan)

I suggest you contact QMI (www.qmi-inc.com) or Airstar (www.airstar1.com)

Rgds
Joe



 
 Reply 
 
Randy Plis
Sales, Consultant
AMDATA NDE Technology LLC, USA, Joined Oct 1999, 23

Randy Plis

Sales, Consultant
AMDATA NDE Technology LLC,
USA,
Joined Oct 1999
23
05:39 Dec-03-2001
Re: UT for laminates
: : I am looking for a device to detect delamination in a fibre product 0.120" thick
: : 48" wide. Product is moving at 60ft/min on a belt conveyor. Any companies or suggestions?

: Have we established how small of a flaw he is looking for? My recollection is that air scans tend to be used for fairly large diameter flaws.


 
 Reply 
 

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