×
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!
  • 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

Jobs

Transverse shear stiffness

Transverse shear stiffness

Transverse shear stiffness

(OP)
Hi!!
Here, I modelled my structure with shell elements S3 and S4.
For the validity of the study I must use a UMAT.
When I carry out calculation, abaqus writes to me in the .dat:
 ***WARNING: TRANSVERSE SHEAR STIFFNESSES ARE NOT DEFINED FOR THIS USER DEFINED
             MATERIAL(UMAT): LAYER=1. SOME SHELL ELEMENTS REQUIRE TRANSVERSE
             SHEAR STIFFNESS
and then
 ***ERROR: TRANSVERSE SHEAR STIFFNESS OF SHELL SECTION IS ZERO FOR ELEMENT 1
for each elements and the he stops the analysis.
I read on the online help hat when one wants to use a umat with  shell elements. He had to use *TRANSVERSE SHEAR STIFFNESS and to give Kts11,Kts22, and Kts12 in this card.
How can I recover these coefficients, with a preceding analysis which does not call upon the umat?
thank you

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