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Technical Discussions
abera
abera
00:55 Oct-09-2005
Testing of thin adhesive bonds

Im working on ultrasnic test of impact damaged adhesively bonded composites.I have tried pulse -ecdho method.THis method suffers sensitivity to test the adhesive layer,because the bond line thickness is too thin.Any body who has an idea about what altranative test I have to carry out in order to asses the damage in the adhesive bond line? The thickness of the adhesive bond lie is like 0.3mm.
Thank you


    
 
 Reply 
 
S.V.Swamy
Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex , India, Joined Feb 2001, 787

S.V.Swamy

Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex ,
India,
Joined Feb 2001
787
08:41 Oct-11-2005
Re: Testing of thin adhesive bonds
Dear Abera,

try through-transmission technique. The portion that has suffered bond-damage will not allow efficient transmission. You need to establish the patterns using known defect standards. I can help you if needed.

Swamy

----------- Start Original Message -----------
: Im working on ultrasnic test of impact damaged adhesively bonded composites.I have tried pulse -ecdho method.THis method suffers sensitivity to test the adhesive layer,because the bond line thickness is too thin.Any body who has an idea about what altranative test I have to carry out in order to asses the damage in the adhesive bond line? The thickness of the adhesive bond lie is like 0.3mm.
: Thank you
------------ End Original Message ------------




    
 
 Reply 
 
Rajesh
R & D
Apex Research Technologies, United Kingdom, Joined Sep 2005, 1

Rajesh

R & D
Apex Research Technologies,
United Kingdom,
Joined Sep 2005
1
09:24 Oct-12-2005
Re: Testing of thin adhesive bonds
Dear Abera,

There are many other techniques for testing disbonding in layered structures. For selection of suitable technique for your application following additonal information will be required:

- type of composite you are testing(glass or carbon)
- thickness of the upper composite layer
- type of adhesive

Thanks.


----------- Start Original Message -----------
: Dear Abera,
: try through-transmission technique. The portion that has suffered bond-damage will not allow efficient transmission. You need to establish the patterns using known defect standards. I can help you if needed.
: Swamy
: : Im working on ultrasnic test of impact damaged adhesively bonded composites.I have tried pulse -ecdho method.THis method suffers sensitivity to test the adhesive layer,because the bond line thickness is too thin.Any body who has an idea about what altranative test I have to carry out in order to asses the damage in the adhesive bond line? The thickness of the adhesive bond lie is like 0.3mm.
: : Thank you
------------ End Original Message ------------




    
 
 Reply 
 
Simon Amallraja
Simon Amallraja
03:10 Oct-12-2005
Re: Testing of thin adhesive bonds
----------- Start Original Message -----------
: Dear Abera,
: There are many other techniques for testing disbonding in layered structures. For selection of suitable technique for your application following additonal information will be required:
: - type of composite you are testing(glass or carbon)
: - thickness of the upper composite layer
: - type of adhesive
: Thanks.
:
: : Dear Abera,
: : try through-transmission technique. The portion that has suffered bond-damage will not allow efficient transmission. You need to establish the patterns using known defect standards. I can help you if needed.
: : Swamy
: : : Im working on ultrasnic test of impact damaged adhesively bonded composites.I have tried pulse -ecdho method.THis method suffers sensitivity to test the adhesive layer,because the bond line thickness is too thin.Any body who has an idea about what altranative test I have to carry out in order to asses the damage in the adhesive bond line? The thickness of the adhesive bond lie is like 0.3mm.
: : : Thank you
------------ End Original Message ------------

Contact Mr. Chris Kirby of NDT Solutions. You can try thier website for Rapidscan Model, which can help you on this application.
www.ndtsolutions.com

Also you can contact Mr. Neeraj Bhardwaj of Ultran Group ( www.ultran.com), they do it with Non Contact UT (NCU)method.
Both are interesting for Composite applications.

D.Simon Amallraja.


    
 
 Reply 
 

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