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!
  • Students Click Here

*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.

Students Click Here


PCOMP Damping Properties

PCOMP Damping Properties

PCOMP Damping Properties


I'm creating a laminate in PATRAN with two different materials with different damping coefficients (0.001 and 0.1):

$ Material 1
MAT1     1      7.+10           .3      2700.                   .001

$ Material 2
MAT1     2      5.+10           .4      700.                    .1 

When looking into the PCOMPG card created in the .bdf, PATRAN has simply calculated an average with respect to the thickness (0.067) of both the damping coefficients (what doesn't seem to make any sense), as shown below:

PCOMPG   1                                              .067
         1       1      .001     0.      YES
         2       2      .002     0.      YES 

What can I do to get a reasonable equivalent damping coefficient for the laminate created? Should I work instead with complex stiffness for both materials?
Thanks in advance.

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!


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