×
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

Node selection by path

Node selection by path

Node selection by path

(OP)
Hello All,

Thank you for every one for answering my questions quickly. I really appreciate all your help.

I have couple of questions,

1. Is there any way to select the nodes by path in orphan mesh part. For example selecting nodes on end edge of circular hole of a body?
2. Is there any option other than *tie to apply between to contact faces. Tie is like gluing together, so looking for any other option as we run linear perturbation all the time?
if I use *contact pair in my model it will become friction less tie because of linear perturbation analysis, If I am correct,please let me know your views.

Kind Regards,

RE: Node selection by path

When it comes to the first question you can use Create Set —> Node —> Select the nodes for the set: by feature edge.

Tie means that the surfaces can’t have relative movement during the analysis (contact won’t change). Thus it can be used for linear analysis. Contact pairs on the other hand allow for the relative movement so contact changes and the analysis must account for this nonlinearity. You can also use tied contact but tie constraint is better than this. So whenever you perform linear static perturbation analysis, contact can’t change and behaves like tie.

RE: Node selection by path

(OP)
Perfect.Thank you FEA Way.

RE: Node selection by path

(OP)
Hi FEA Way,

From above discussion I have one more question, Is there any guideline for choosing *Tie or *Contact Pair while doing analysis.
I was practicing for all my analyses that applying contacts wherever the components are meeting together,Please let me know your views.

Kind regards,

RE: Node selection by path

The general rule is that you use tie when you want your components to be perfectly glued (or welded) together so that they can’t move relative to each other. On the other hand contact is used when you want to include motion - surfaces in contact can slide and separate from each other. In reality most cases would require the use of contact but we often ignore the relative motion when it’s supposed to be rather small and apply tie constraint merging surfaces like they were single part. Also contact is required when surfaces initally aren’t touching but we know (or think) that they will touch in the analysis due to deformation of the model.

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


Resources

White Paper - The Criticality of the E/E Architecture
Modern vehicles are highly sophisticated systems incorporating electrical, electronic, software and mechanical components. Mechanical systems are giving way to advanced software and electronic devices, driving automakers to innovate and differentiate their vehicles via the electric and electronic (E/E) architecture. As the pace of change accelerates, automotive companies need to evolve their development processes to deliver and maximize the value of these architectures. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
Modern cars, trucks, and other vehicles feature an ever-increasing number of sophisticated electrical and electronic features, placing a larger burden on the wiring harness that enables these new features. As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - Modeling and Optimizing Wire Harness Costs for Variation Complexity
This paper will focus on the quantification of the complexity related costs in harness variations in order to model them, allowing automated algorithms to optimize for these costs. A number of real world examples will be provided as well. Since no two businesses are alike, it is the aim of this paper to provide the foundational knowledge and methodology so the reader can assess their own business to model how variation complexity costs affect their business. Download Now

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