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 -

 1741 views
Technical Discussions
Don
Don
06:58 Mar-04-2004
Calculation of velocity of surface waves

Does anybody know the equation for calculating the surface (Rayleigh) wave velocity, given the material properties, modulus of elasticity, poisson's ratio density etc?

I have seen rough calculation as 0.92*ShearVelocity, and a more accurate result using a calculator at www.eng.vt.edu/fluids/msc/jscalc/wscac02.htm but do not know the equations hidden inside it. Any ideas, Don

Paul A. Meyer
R & D,
GE Inspection Technologies, USA, Joined Nov 1998, 47

Paul A. Meyer

R & D,
GE Inspection Technologies,
USA,
Joined Nov 1998
47
02:55 Mar-04-2004
Re: Calculation of velocity of surface waves
In ULTRASONIC WAVES IN SOLID MEDIA, Joseph Rose references an approximate solution by Viktorov. The ratio of the surface wave speed to the shear wave speed (Cr/Ct)= (0.87 + 1.12*nu)/(1+nu) where nu is Poisson's ratio. For nu = 0.29 the ratio is 0.92 as you stated.
Paul

----------- Start Original Message -----------
: Does anybody know the equation for calculating the surface (Rayleigh) wave velocity, given the material properties, modulus of elasticity, poisson's ratio density etc?
: I have seen rough calculation as 0.92*ShearVelocity, and a more accurate result using a calculator at www.eng.vt.edu/fluids/msc/jscalc/wscac02.htm but do not know the equations hidden inside it. Any ideas, Don
:
------------ End Original Message ------------

Neil Burleigh
Sales
Krautkramer Australia Pty Ltd, Australia, Joined Dec 2002, 159

Neil Burleigh

Sales
Krautkramer Australia Pty Ltd,
Australia,
Joined Dec 2002
159
00:51 Mar-05-2004
Re: Calculation of velocity of surface waves
----------- Start Original Message -----------
: Does anybody know the equation for calculating the surface (Rayleigh) wave velocity, given the material properties, modulus of elasticity, poisson's ratio density etc?
: I have seen rough calculation as 0.92*ShearVelocity, and a more accurate result using a calculator at www.eng.vt.edu/fluids/msc/jscalc/wscac02.htm but do not know the equations hidden inside it. Any ideas, Don
:
------------ End Original Message ------------

Don,
There is a formula for the calculation of velocity of surface waves given on pg 22 of "The Krautkramer Booklet" (The blue book)It looks like it is the same formula as the one that Paul Meyer offered but it has not presented as a ratio. If you don't have a "blue" book contact your local Krautkramer Rep.

Regards
Neil Burleigh
P.S. The blue book now has a white cover.

Product Spotlight

#### VOGT Ultrasonics awarded innovation champion

Let go of the old and try something new. VOGT convinced the jury in the 27th round of the TOP 100
...
innovation competition. Our team is very pleased to officially belong to the TOP 100 in Germany!
>

#### UCI Hardness Tester NOVOTEST T-U2

UCI hardness tester NOVOTEST T-U2 is is used for non-destructive hardness testing of: metals and
...
alloys by scales of hardness: Rockwell (HRC), Brinell (HB), Vickers (HV); non-ferrous metals, alloys of iron etc., and using five additional scales for calibration; with tensile strength (Rm) scale determines the tensile strength of carbon steel pearlitic products by automatic recalculation from Brinell (HB) hardness scale.
>

#### TraiNDE UT

TraiNDE UT is a virtual tool associated with a signal database which simulates real inspection con
...
ditions for numerous applications (Type A/V1 block, DAC block, welds and plates).
>

#### ISONIC 3510

Very Powerful Superior Performance Extremely Portable Smart Phased Array Ultrasonic Flaw Detector an
...
d Recorder with 2 Conventional UT and TOFD Channels uniquely combines PA, single- and multi-channel conventional UT, and TOFD modalities providing 100% raw data recording and imaging. Suitable for all kinds of every-day ultrasonic inspections
>

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