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 -

ZETEC, Inc.
Zetec is a global leader in nondestructive testing (NDT) solutions for the critical inspection needs of industries the world counts on every day, ...
750 views
Technical Discussions
Rabindranath
Rabindranath
03:52 May-17-2002
Lamb waves

Hello everyone,

I am trying to simulate Lamb waves on Ansys 5.6 .I have created a plate like model with the required spatial resolution. But I do not know how to apply boundary conditions and loads that would create the lamb waves in the plate. If anyone of you have done this before, Please let me know how to do it.

Is there any example where such a thing has been described? Like simulation of Ultrasonics on Ansys or any other package?

Please help!

Thanks,
Rabindranath.



    
 
 Reply 
 
Michael Conry
Student
University College Dublin, Ireland, Joined May 2002, 3

Michael Conry

Student
University College Dublin,
Ireland,
Joined May 2002
3
00:40 May-31-2002
Re: Lamb waves
Are you doing a 2-D or 3-D model. If you are doing a 2-D model, it might be either a plane-strain model (looking in at the edge of the plate) or a shell-like model.

A 2-D plane strain model is probably the best option. The loads you use depend on things like what mode you want to observe (e.g. symmetric loads for symmetric modes), and can be just as simple as applying a harmonic normal force to small regions of the top and bottom surfaces of your model. The resulting propagating wave will be a Lamb wave (you can verify that by looking at frequency-velocity relationship or looking at the mode-shapes). You will get problems when the wave begins to interact with the ends of the model. Ideally you should use "infinite-elements". These are provided in ABAQUS, but might not feature in ANSYS. Basically, such elements provide quiet boundaries for the model and allow energy to leave the model (so you don't get standing waves).

I hope this helps to get you started
m

: Hello everyone,
.
: I am trying to simulate Lamb waves on Ansys 5.6 .I have created a plate like model with the required spatial resolution. But I do not know how to apply boundary conditions and loads that would create the lamb waves in the plate. If anyone of you have done this before, Please let me know how to do it.
.
: Is there any example where such a thing has been described? Like simulation of Ultrasonics on Ansys or any other package?
.
: Please help!
.
: Thanks,
: Rabindranath.
.



    
 
 Reply 
 
utkarsh
utkarsh
10:40 Dec-14-2015
Re: Lamb waves
In Reply to Michael Conry at 00:40 May-31-2002 .

Hi ,
Can anyone please help me to simulate waves in a composite plate using abaqus

    
 
 Reply 
 

Product Spotlight

GEKKO - Portable Phased Array Testing with TFM in Real-Time

The portable phased array testing system GEKKO provides 64 parallel test channels. On creating testi
...
ng parameters the operator is assisted by the CIVA software. Due to its modular set-up the GEKKO instrument is suitable for operators of all skill levels.
>

Combination of Digital Image Correlation and Thermographic Measurements

The combination of measuring results from the digital image correlation (ARAMIS, DIC) and temperat
...
ure measuring data from infrared cameras permits the simultaneous analysis of the thermal and mechanical behavior of test specimens in the materials and components testing field.
>

NovaScope 6000

The all-digital Novascope 6000 is a portable, ultra-high precision thickness gauge for high-speed
...
thickness measurement. Novascope 6000 has unmatched capabilities and unique features including: •Superior Resolution with high contrast, high-speed color RF display •High pulser voltage •Real-time video output •Increased internal/external data storage •Programmable SetUp features •Battery & AC Powered
>

NEOS III

NEOS III is Logos Imagings lightest DR system. With a built-in battery and internal wireless commu
...
nication, the NEOS III is perfect for users that want to quickly assess an item.
>

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