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

Birth and Death with loadsteps

Birth and Death with loadsteps

(OP)
Hi,
I have two cantilever beams (3d) meshed with SOLID 45 elements arranged one over the other. Contact elements (CONTA173 and TARGE 170)are generated between them. In first loadstep I want to bend them and in second load step, I want to apply a surface load (pressure). Contact elements between two beams  should be killed in first load step and  should be activated in second load step.I used EKILL and EALIVE separately with lswrite commands. It solves only first load step and stops. I have used KINH material model. Can you guide me, how to solve it ?





























RE: Birth and Death with loadsteps

First thing - isfiles don’t support any contact elements.

Then step-wise what you can do is -
1. in 1st load step kill the contact elems.
2. apply bending load.
3. when u solve with iswrite command before solve command, it will write initial stress file.
4. in 2nd LS make contact elems alive however before you read isfile you unselect the contact elems.
5. now select everything ALLSEL. and solve.

note - iswrite creates initial stress values in reverse fashion for example, if you apply tension it creates initial stress values for compression, thus be careful

-Hemant

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