INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

internal DAMPING in aluminum alloy

internal DAMPING in aluminum alloy

(OP)
I'm looking for some detailed datas about the internal damping factor of cast aluminum alloy and wrought aluminum alloy. This factor is nearly unfindable (matweb included).
Thanks

RE: internal DAMPING in aluminum alloy

Try contacting NADCA (North American Diecasting Association) on www.diecasting.org they'll give you an impartial set of data. Alternatively try www.aluplanet.com a global aluminium industry site.
If "damping" of noise or vibration is your main issue, why not try looking into cast Magnesium ? Much better damping properties.
Good hunting !

RE: internal DAMPING in aluminum alloy

(OP)
Thank you for your fast answer!
Cast magnesium is an expensive choice and before changing material we must evaluate the real benefit, however I will keep it in mind.

RE: internal DAMPING in aluminum alloy

Cast Magnesium is much more cost effective now than it used to be. What generally happens is that the part is designed in Al, has problems then someone decides to convert the part to Mg. So wall sections, radii, ribs etc. are as laid down for Al. However if the part is designed as Mg from the start with thinner walls etc. and more attention is paid to the "structural design" the cost benefits can be considerable with the added benefit of the 1/3 reduced spec' density and improved damping of noise & vibration.
This all depends on the volume required of the part of course !
Sorry for the lengthy response, Al & Mg casting is what I do in the UK and is very close to my heart !
I've been thinking a bit more about the DAMPING DATA, fixed data will be impossible to find as it is so dependant on shape, cast process used, alloy etc., etc..
I have just spoken to a colleague at a company called Calcom/ESI. If you direct your question to mail@calcom.ch for the att'n of Adrian, he will find out what data they have. They are leaders in Casting software for F.S.A. and one specific area they excel in is vibration damping.
Good luck !

RE: internal DAMPING in aluminum alloy

I WILL NEED ADDITIONAL INFORMATION BEFORE I CAN OFFER SUGGESTIONS, APPLICATION DETAILS, FREQUENCIES INVOLVED, TEMPERATURES, ETC. THERE ARE MATERIALS THAT CAN BE SANDWICHED BETWEEN THIN LAYERS OF MANY SUBSTRATES THAT ABSORB LARGE AMOUNTS OF VIBRATION AND SHOCK ENERGY. ALSO, LOOK UNDER VISCO ELASTIC COATINGS. VINYL'S ALSO OFFER ABSORPTION, INCLUDING DIP VINYLS.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close