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

Fastener to feature diameter

Fastener to feature diameter

Fastener to feature diameter

Is there anyway to relate a fastener to the hole diameter in mechanica? I would like to link them so I can study the effects of changing the fastener diameter. I'm not seeing a straight forward way with the fastener dialog.

RE: Fastener to feature diameter

can't you parametrize the hole diameter and the fastener diameter independently or concurrently? that's one way. I don't know how it works in Mechanica, but some FE fastener models automatically specify fastener diameter when you create it--whatever hole the fastener is assigned to, the FE software automatically assumes the fastener and hole are
'neat fit', that is, the same diameter. To specify a fastener hole clearance or interference, you might specify that someplace else like the Load window/interface.

RE: Fastener to feature diameter

That's basically what I ended up doing. I created a Pro/E Parameter in the assembly and then related the diameter dimensions to the parameter and then in mechanica related the fastener diameter to the parameter. Then to top it all off I made the parameter a design parameter for Design Studies and Optimization.

RE: Fastener to feature diameter


Turns out there's some kind of bug that stops optimization studies in their tracks when doing this. If you use fastener shear stress as a limit it causes a problem. The measure on the fastener shear stress disappears between steps and then the study fails with an internal engine error. If you bring the definition up the limits on fastener shear stress are missing.

Global studies work fine.

Short version: You can't optimize based on fastener shear stress.

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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