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 -
 1807 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?

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.

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

Michel Couture

NDT Inspector,
consultant,
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

Product Spotlight

Compact NDT inspection-heads for measurements with active thermography

The compact inspection head is suitable for thermographic ndt tasks. The uncooled infrared camera
...
is specially developed for NDI-tasks and offers a thermal sensitivity until now known only from thermal imagers with cooled detector. All required components and functions are integrated into the inspection-head. You will only need an ethernet cable to connect the sensor with the evaluation system.
>

Ultrasonic Testing Immersion Tanks with Unmatched Scanning Features

TecScan’s non-destructive testing Ultrasonic Immersion Tanks & scanners are designed for high pe
...
rformance and demanding NDT testing applications. Our Scan3D™ line of High Precision Immersion Tanks are specifically designed for automated ultrasonic testing of complex composites parts used in aerospace and industrial applications.
>

GUL Subsea Solutions - Screeening & Monitoring

To inspect new and existing subsea lines, you need proven technology and experience. GUL offers it's
...
technology to solve this challenge: GUL Subsea and gMAT Transducer Rings.
>

NOVO Armor 15 & NOVO Armor 22

The Armor Kit Contains the NOVO Armor, which provides additional mechanical protection to the NOVO 1
...
5WN & NOVO 22WN Detectors, the Armor Stand and a traveling soft cover. - Newest shock absorbent technology case - Water resistant design - Supports wired & wireless communication - Multiple positioning options - Tripod connection using the Built-in 1/4” threads - Simple Detector battery replacement
>

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