×
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

Meshing an assembly of differents materials

Meshing an assembly of differents materials

Meshing an assembly of differents materials

(OP)
So i have this question. I've build a design with abaqus(5 parts) that i imported to Abaqus. I have 3 differents materials.
What i've done is, give every part its own material, then build the assembly, and merge the 5 parts. With merge it generated one part of the assembly, are still the differents materials asigned?
Also, when i merge with dependent instance one of the part disappear,i read that may it was better than instead of mergin it, use a costraint. Can anyone tell me how should i use the costraint? If i use the costraint for this 2 parts, should i use also merge for the rest of the assembly?

I know..to much question, but it's difficult to find answers about abaqus

RE: Meshing an assembly of differents materials

It's definitely better to use tie constraint instead of merging parts. When you define this constraint just select master and slave surfaces (surfaces belonging to different parts). This is very similar to defining contact but you don't specify property sińce behavior is always the same (no relative motion between surfaces). But if you still want to merge parts then make sure three are proper partitions and each cell (volume) has its material applied. You can use display options to color parts depending on the section/material.

RE: Meshing an assembly of differents materials

(OP)
Thank you friend. The thing is, I have a mold, where I have put the screw and the hole of the mold is equal to the screw. Screw fillets should go with constraint to the hole fillets, but those in the hole are not visible when the screw is inside. How i put the costraints?
And then to make the mesh, if I want there to be only one mesh for the entire object and also keep the materials, should Merge do after tie costraint and partition to give the material?

RE: Meshing an assembly of differents materials

You can use Display Group options to hide screw when selecting surfaces of the hole. Then invert the display so that only screw will be visible and you will be able to select its faces.

These two approaches are interchangeable fo the same group of parts. So either you merge them to keep uniform mesh (in such case partitions are needed to maintain different material properties) or you use separate meshes and materials and join the parts via tie constraint. For screws and holes I would recommend the second method (tie constraints).

RE: Meshing an assembly of differents materials

(OP)
Alright, i Will try it as soon as possible.
For the other parts, a crown on top oferta the screw, should i also use costraints? Or merging them?

Thank you

RE: Meshing an assembly of differents materials

This one could be merged but still I think it’s better to use tie constraint. One reason is that you can easily replace it with contact.

RE: Meshing an assembly of differents materials

(OP)
What do you mean replace with Contact? I had give every part their properties, and put the tie costraint between screw and model, should i put something between the crown and the screw? Another costraint?

Thank you

RE: Meshing an assembly of differents materials

At some point you may want to make the analysis more realistic and apply contact (possible relative motion of the surfaces) instead of tie constraint (no motion). Then it’s very easy to convert all ties using for example Find Contact Pairs tool.

But even if you don’t want any contact, still I would recommend tie constraint. It allows independent meshes (usually resulting in better mesh quality and less issues), works even with small separation between surfaces and so on.

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

eBook - Rethink Your PLM
A lot has changed since the 90s. You don't surf the Web using dial-up anymore, so why are you still using a legacy PLM solution that's blocking your ability to innovate? To develop and launch products today, you need a flexible, cloud-based PLM, not a solution that's stuck in the past. Download Now
White Paper - Using Virtualization for IVI and AUTOSAR Consolidation on an ECU
Current approaches used to tackle the complexities of a vehicle’s electrical and electronics (E/E) architecture are both cost prohibitive and lacking in performance. Utilizing virtualization in automotive software architecture provides a better approach. This can be achieved by encapsulating different heterogeneous automotive platforms inside virtual machines running on the same hardware. 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