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Technical Discussions
Dr.Tim Janis
Dr.Tim Janis
00:45 Sep-17-1998
Crack Detection in Pipes Using Sh

To the Memebers of the Forum:
I appreciate this opportunity to obtain some input from an illustrious group of scientists, enginees and business persons.
My name is Tim Janis and my company ARAC was formed in 1963 as NASA’s first technology
transfer center and was operated by Indiana University until 1991. In January,
1992 the center was privatized as ARAC, Inc. The company specializes in adding
value to information.

We currently have a project with a research center whereby we are trying ascetain the state-of-the-art of horizontal polarized shear waves technology. Our particular interest is in the application of the technology to crack detection in piplines.
I would be most appreciative of any input you could provide about avaialable technology, relevant R&D, expertise, etc. We have conducted a literature search but know that the most current information is in the minds of experts like you.

I hope I am not abusing the forum system. If you need additional information please contact me. Thanking you in advance for your assistance.

Regards, Tim
ARAC, Inc.
604 E. Davis Dr.
(Note as of 7/2/98 this is a new street address)
Suite C
Franklin, IN 46131
tel: 317/738-3886 \\ fax: 317/738-3980 \\ email: arac@iquest.net
URL: http://advicom.net/~arac




    
 
 Reply 
 
Rolf Diederichs
Director,
NDT.net, Germany, Joined Nov 1998, 608

Rolf Diederichs

Director,
NDT.net,
Germany,
Joined Nov 1998
608
03:18 Sep-18-1998
Re: Crack Detection in Pipes Using horizontal polarized Shear waves

: We currently have a project with a research center whereby we are trying ascetain the state-of-the-art of horizontal polarized shear waves technology. Our particular interest is in the application of the technology to crack detection in piplines.
: I would be most appreciative of any input you could provide about avaialable technology, relevant R&D, expertise, etc. We have conducted a literature search but know that the most current information is in the minds of experts like you.

--------

Tim,

thanks for your interesting topic which you posted to the forum.
I assume that you used already the NDTnet search,
anyway I would like to make sure that you did not missed
the following literature.

www.ndt.net/article/pow1297/schmid/schmid.htm
Ultrasonic Testing of Austenitic and Dissimilar Metal Welds
Schmid Rudi; Siemens Erlangen, DE

www.ndt.net/abstract/fhg_ec.htm
The capability and application of horizontally polarized
shear waves for the ultrasonic inspection of austenitic welds
Huebschen, G., IZFP Saarbrücken

On this forum are experts like H. Wüstenberg, Achmad Chahbaz,
and Ed Ginzel who may know more about this subject.

Rolf Diederichs


    
 
 Reply 
 
A. Chahbaz
A. Chahbaz
07:21 Sep-26-1998
Re: Crack Detection in Pipes Using Sh
: To the Memebers of the Forum:
: I appreciate this opportunity to obtain some input from an illustrious group of scientists, enginees and business persons.
: My name is Tim Janis and my company ARAC was formed in 1963 as NASA’s first technology
: transfer center and was operated by Indiana University until 1991. In January,
: 1992 the center was privatized as ARAC, Inc. The company specializes in adding
: value to information.

: We currently have a project with a research center whereby we are trying ascetain the state-of-the-art of horizontal polarized shear waves technology. Our particular interest is in the application of the technology to crack detection in piplines.
: I would be most appreciative of any input you could provide about avaialable technology, relevant R&D, expertise, etc. We have conducted a literature search but know that the most current information is in the minds of experts like you.

: I hope I am not abusing the forum system. If you need additional information please contact me. Thanking you in advance for your assistance.

: Regards, Tim
: ARAC, Inc.
: 604 E. Davis Dr.
: (Note as of 7/2/98 this is a new street address)
: Suite C
: Franklin, IN 46131
: tel: 317/738-3886 \\ fax: 317/738-3980 \\ email: arac@iquest.net
: URL: http://advicom.net/~arac
-----------------------------
--------

Hi,

We are an engineering and systems manufacturing company specializing in the
development and marketing of advanced nondestructive inspection equipment,
development of new leading edge inspection technologies and in providing
safety and reliability engineering services. We at Tektrend develop and
offer fully automated inspection systems based on Horizontal shear waves
using EMAT probes. We use guided and bulk horizontal shear waves with such
systems.

Horizontal shear waves provide a number of significant advantages over
conventional ultrasonic waves, which make them attractive to inspect with.
They do not suffer mode conversion at interface that increases their
penetrating power and beam concentration since their energy is not lost in
the conversion process. Absence of mode conversion also enhances signal
quality since the reflected signals are not converted and encumbered with
the noise of parasitic signals. The total absence of the normal particle
displacement component produces non-excessive coupling of their ultrasonic
energy to the inspected media. Recently, I presented two papers
demonstrating some of the results obtained with Horizontal shear waves:


1. A. Chahbaz , V. Mustafa, J. Gauthier and D.R. Hay 'Disbond Detection and
Characterization Using Horizontally Shear Waves and EMAT Probes' ,
Presented at 25th Annual Review of progress in QND, Snowbird, Utah.
2. J. Gauthier, V. Mustafa, A. Chahbaz and D.R. Hay 'EMAT Generation of
Polarized Shear Waves for Pipe Inspection,' CSNDT Conference, 14-18 Sep.
1998.

If you need any more information in a particular application please do not
hesitate to contact us.

A. Chahbaz
R&D Manager
Tektrend International Inc.

tel.: 450-421-1417
Fax: 450-421-1487
emailto: research@tektrend-intl.com



    
 
 Reply 
 
grant
grant
07:58 Oct-17-2000
Re: Crack Detection in Pipes Using Sh
: To the Memebers of the Forum:
: I appreciate this opportunity to obtain some input from an illustrious group of scientists, enginees and business persons.
: My name is Tim Janis and my company ARAC was formed in 1963 as NASA’s first technology
: transfer center and was operated by Indiana University until 1991. In January,
: 1992 the center was privatized as ARAC, Inc. The company specializes in adding
: value to information.

: We currently have a project with a research center whereby we are trying ascetain the state-of-the-art of horizontal polarized shear waves technology. Our particular interest is in the application of the technology to crack detection in piplines.
: I would be most appreciative of any input you could provide about avaialable technology, relevant R&D, expertise, etc. We have conducted a literature search but know that the most current information is in the minds of experts like you.

: I hope I am not abusing the forum system. If you need additional information please contact me. Thanking you in advance for your assistance.

: Regards, Tim
: ARAC, Inc.
: 604 E. Davis Dr.
: (Note as of 7/2/98 this is a new street address)
: Suite C
: Franklin, IN 46131
: tel: 317/738-3886 \\ fax: 317/738-3980 \\ email: arac@iquest.net
: URL: http://advicom.net/~arac




    
 
 Reply 
 

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