×
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

support modelling

support modelling

support modelling

(OP)
hi

I am modelling a three point bending test with varying spans, I applied the load, displacement controlled by contact modelling. I use rigid supports with only u3 and ur1 free.

For large spans (bending moment dominating), I have nice results(0-3%)for ultimate load by using stabilization
coefficient due to convergence issues (mesh refinement)and I check for ALLSD/ALLIE.

For short spans I am having problems with mesh refinement, I can refine the mesh to 2 mm and use 4 mm for the load bearing plate, but the results are -50%, while for a very coarse mesh its like -5%. The shear force is dominating now. I tried modelling the supports by using contact plates, making them rigid, using a line support but nothing seems to work.The solution converges and I dont have to use stabilization but my results are way off.

I use S4R linear elements.

any help or advice is greatly appreciated



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