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 -
1805 views
Technical Discussions
novice
novice
03:56 Apr-30-2008
shear wave test frequency and probe angle

How can I calculate the test frequency and probe angle to be used before preforming a shear wave examination?


 
 Reply 
 
Gowri Santhosh Palika
Gowri Santhosh Palika
03:36 May-01-2008
Re: shear wave test frequency and probe angle
----------- Start Original Message -----------
: How can I calculate the test frequency and probe angle to be used before preforming a shear wave examination?
------------ End Original Message ------------

Calculation of probe angle
It is depend on the thickness of job and weld geometry. There is a formula to get probe angle according to thickness ''Probe angle = 90 - T''. Here T is thickness of job. There is an another formula according to weld geometry is '' Probe angle = 90-®/2''. Here ®(tita) = groove angle. this formula is used when the job thickness is high and if therf is any necessity.
Probe frequency
It is depend on the type of job, job material, sensitivity requirements and thickness of job. There is no any formulas to calculate the probe frequency.


 
 Reply 
 
Michel Couture
NDT Inspector,
consultant, Canada, Joined Sep 2006, 889

Michel Couture

NDT Inspector,
consultant,
Canada,
Joined Sep 2006
889
00:13 May-01-2008
Re: shear wave test frequency and probe angle
----------- Start Original Message -----------
: : How can I calculate the test frequency and probe angle to be used before preforming a shear wave examination?
: Calculation of probe angle
: It is depend on the thickness of job and weld geometry. There is a formula to get probe angle according to thickness ''Probe angle = 90 - T''. Here T is thickness of job. There is an another formula according to weld geometry is '' Probe angle = 90-®/2''. Here ®(tita) = groove angle. this formula is used when the job thickness is high and if therf is any necessity.
: Probe frequency
: It is depend on the type of job, job material, sensitivity requirements and thickness of job. There is no any formulas to calculate the probe frequency.
------------ End Original Message ------------

Hi,

I totally agree, but would like to ad to that. In regards to weld inspection, very often, you don't have a choice in the frequency and probe angle. They are dictated by code. But has Gowri said, it depends on thickness and part geometry.

Secondly, to help you a little more, as a rule of thumb my buddies and I are using the following guidelines: Less than 6 inches (12 mm) we use a 5 MHz. Greater than 6 we use 2.25 MHz. The other rules of thumb we go by is if the art is greater than 3 inches (6 mm) in thickness we use a 1 inch (25 mm) diameter probe.

Hope this is helping

Michel




 
 Reply 
 

Product Spotlight

IntraPhase Athena Phased Array System

The Athena Phased Array system, manufactured by WesDyne NDE Products & Technology, consists of a pha
...
sed array acquisition system and PC running IntraSpect software. A PC is used to perform acquisition, analysis and storage of the data. System hardware is capable of operating up to four data sets with any combination of phased array or conventional UT probes. NOW AVAILABLE IN 64-64 CONFIGURATION.
>

High-performance Linear Phased Array Probes

Available to order from stock in a range of 5MHz – 7.5MHz and from 16 to 64 elements. Designed w
...
ith piezo-composite elements, Phoenix phased array probes provide high-resolution imaging to maximise sensitivity; accurate ultrasonic detection and sizing of defects in welds; and effective corrosion mapping. Housed in a rugged stainless steel case for on-site industrial NDT applications.
>

A1525 SOLO

A1525 Solo – the most compact and affordable TMF unit with two phased array transducers and 3D v
...
isualization and analysis software in standard delivery set. A compact, ergonomic and easy to handheld Phased Array unit based on Total Focusing Method for easy-going imaging of inspection objects with two-dimensional and three-dimensional visualization and evaluation of inspection results.
>

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.
>

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