×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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.

Students Click Here

Define bolt load with normal screws in Abaqus

Define bolt load with normal screws in Abaqus

Define bolt load with normal screws in Abaqus

(OP)
Hello together,

in my simulation I use bolts with nuts (simplified) and normal bolts with threads that are screwed in a hole. I don't get any error messages with the screws with nuts, but I don't know exactly how to interact the normal screws with thread. Do I have to create a tie constraint between the screw shaft and the hole? I get the following error message afterwards:

-72 nodes may not be used with a multi-point constraint since they are also part of pretension section. The nodes have been identified in node set ErrNodeMPCPretenSec.

I have a suspicion that there is a problem with the condition of the tie-constraint interacting with the preload of the bolts and thus there is a double interaction. I have now set the surface for the preload of the screw further in the direction of the screw head so that the tie-constraint and the preload of the screw do not overlap. Is this the right way to go? Does anyone know this problem and maybe has a tip for me?

Thank you for your efforts!

RE: Define bolt load with normal screws in Abaqus

So the threads mentioned by you are not modeled ? Can you share a screnshot showing the bolt and the part (or parts) to which the bolt needs to be connected ? Tie constraints are sometimes used between the head/nut and the surfaces of connected parts but not between the bolt shaft and inner surfaces of the holes. There you typically have some clearance and contact defined if needed.

RE: Define bolt load with normal screws in Abaqus

(OP)
Hello FEA way,

thank you for your quick respond. Yes, the threads were not modeled because I wanted to do a simplified calculation.

Here is the screenshot.

Unfortunately, I didn't find anything about it in the forum, where only the connection between a screw and a nut is discussed.

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! Already a Member? Login



News


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