where expertise comes together - since 1996

Web's Largest Portal of Nondestructive Testing (NDT)
Open Access Database (Conference Proceedings, Articles, News), Exhibition, Forum, Network

All Forum Boards
Technical Discussions >
Detecting thermal crack by NDT methods
Career Discussions
Job Offers
Job Seeks
Classified Ads
About NDT.net
Articles & News

Vallen-Systeme GmbH
The Acoustic Emission Company! Since 1987 Vallen stands for competence and continuity in AE and for reliable business cooperation and support.

713 views
05:39 Aug-26-2003

Velu Perumal

Consultant, Research
National University of Singapore ,Singapore,
Singapore,
Joined Jun 2003
1
Detecting thermal crack by NDT methods

Dear All,
I am working on thermal cracks on concrete.I would like to measure thermal stress and strains,crack precisely.Ofcourse surface cracks we can measure any methods. But thermal cracks are haapened internally.Can i measure thermal cracks using any one of current NDT methods.We already conducted thermal shock experiment (Circular Ring Specimen) using AE. Currently we have Acoustic Emmission(AE),UPV & Impact echo.please give your valuable suggestions


 
03:13 Aug-27-2003

Bastiaan Janssen

NDT Inspector, Managing Xray micro-Tomography
NRG,
Netherlands,
Joined Jul 2003
4
Re: Detecting thermal crack by NDT methods Dear Velu Perumal,

Depending on size of test samples, erg. drilled core cylinders, I would suggest micro tomography,.Using x-ray or gamma ray's and a focal spot for the radiation source, this results in magnified projections wich can be reconstructed, using using many pictures form differend angeles, into a 3D-dataset. We have obtained internal crack visualisations of concrete cylinders diameter 5 cm, with a resolution of 1/10 m; Depending on x-ray energy, source spotsize and sample diameter...

Best regards.
(On holliday until october)
http://www.nrg-nl.com/product/ppt/tomo/index.html

----------- Start Original Message -----------
: Dear All,
: I am working on thermal cracks on concrete.I would like to measure thermal stress and strains,crack precisely.Ofcourse surface cracks we can measure any methods. But thermal cracks are haapened internally.Can i measure thermal cracks using any one of current NDT methods.We already conducted thermal shock experiment (Circular Ring Specimen) using AE. Currently we have Acoustic Emmission(AE),UPV & Impact echo.please give your valuable suggestions
------------ End Original Message ------------




 
09:32 Feb-26-2004
R.Malathy, Senior Lecturer in Civil Engineering, Kongu Engineering college, Peru
Re: Detecting thermal crack by NDT methods Dear Sir,

We have TICO ultrasonic Pulse velocity tester. How to measure the thermal cracks.


 
03:17 Apr-08-2005
zuhudruba
Re: Detecting thermal crack by NDT methods ----------- Start Original Message -----------
: Dear All,
: I am working on thermal cracks on concrete.I would like to measure thermal stress and strains,crack precisely.Ofcourse surface cracks we can measure any methods. But thermal cracks are haapened internally.Can i measure thermal cracks using any one of current NDT methods.We already conducted thermal shock experiment (Circular Ring Specimen) using AE. Currently we have Acoustic Emmission(AE),UPV & Impact echo.please give your valuable suggestions
------------ End Original Message ------------




 
08:21 Jul-03-2005
TERD
Re: Detecting thermal crack by NDT methods ----------- Start Original Message -----------
: Dear Velu Perumal,
: Depending on size of test samples, erg. drilled core cylinders, I would suggest micro tomography,.Using x-ray or gamma ray's and a focal spot for the radiation source, this results in magnified projections wich can be reconstructed, using using many pictures form differend angeles, into a 3D-dataset. We have obtained internal crack visualisations of concrete cylinders diameter 5 cm, with a resolution of 1/10 m; Depending on x-ray energy, source spotsize and sample diameter...
: Best regards.
: (On holliday until october)
: http://www.nrg-nl.com/product/ppt/tomo/index.html
: : Dear All,
: : I am working on thermal cracks on concrete.I would like to measure thermal stress and strains,crack precisely.Ofcourse surface cracks we can measure any methods. But thermal cracks are haapened internally.Can i measure thermal cracks using any one of current NDT methods.We already conducted thermal shock experiment (Circular Ring Specimen) using AE. Currently we have Acoustic Emmission(AE),UPV & Impact echo.please give your valuable suggestions
------------ End Original Message ------------




 


© NDT.net - The Web's Largest Portal of Nondestructive Testing (NDT) ISSN 1435-4934

Open Access Database, |Conference Proceedings| |Articles| |News| |Exhibition| |Forum| |Professional Network|