where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

TecScan Systems
We offer a complete line of NDT scanners, Immersion Tanks & Gantry systems which incorporate Ultrasonic, Phased Array & Eddy Current technologies.
907 views
Career Discussions
sathik
Teacher
Crescent Engineering College, India, Joined Sep 2004, 3

sathik

Teacher
Crescent Engineering College,
India,
Joined Sep 2004
3
05:59 Feb-17-2009
Laser shearography help

Dear sir/ Madam
I am s.sathik basha, working in crescent engineering college, chennai, India. Now i am in process of buying Laser shearography instrument.
I want to know whether this instument is applied to measure the residual stress of the welded components. Plese tell me how to measure the residual stress using laser shearography and what are necessary requirements.

Please help me in this matter.

Expecting your favourable reply.

Yours sincerely

S.Sathik Basha

 
 Reply 
 
Anand Asundi
Director,
Nanyang Technological University, Singapore, Joined Feb 2001, 10

Anand Asundi

Director,
Nanyang Technological University,
Singapore,
Joined Feb 2001
10
06:32 Feb-27-2009
Re: Laser shearography help
In Reply to sathik at 05:59 Feb-17-2009 (Opening).

While there are some papers on Shearography for residual stress determination, I am not sure how best it can be effectively used for this measurement. As with strain gauge methods, to determine residual stress , the hole drilling approach is adopted. However, with optical methods while they do provide whole field information, we would need information from two or three patterns to get the complete state of strain and thus residual stress. Of course if the interest is to just visualize whether stress is present or not , then one picture may suffice.

 
 Reply 
 

Product Spotlight

Conformable wedge transducer

The conformability is obtained with a flexible membrane filled with water between the transducer and
...
the inspected component. The coupling between the membrane and the component requires a small quantity of water or couplant. The conformable wedge combines the acoustic performance of immersion technique with good coupling and low attenuation.
>

Robotic laser shearography enables 100% inspection of complex, flight-critical composite structures

An article in “Composites World Magazine” showcases Non Destructive Testing of aero-structures
...
with Laser Shearography. Over the years Dantec Dynamics has supplied many solutions for the aerospace industry. Referring to specific customer projects several of these cases are examined to outline the advantages of using Laser Shearography for automated defect detection.
>

Customized Probes and Transducers

With a strong development department and our own piezocomposite production, we accompany you from th
...
e first product idea to serial production. Our scientists are continuously researching new methods in the field of ultrasonic measurement technology. The progress achieved enables us to offer you optimal solutions.
>

PROlineTOP Plug & Play Ultrasonic inspection device

As Plug & Play solution it units all control and operation elements in a small housing and therefo
...
re replaces the typical control cabinet...
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window