×
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

Thermal Expansion of hollow features?

Thermal Expansion of hollow features?

Thermal Expansion of hollow features?

(OP)
Just a concept check: a 1/2" 6061 hex-bolt with a 3/8" threaded bore in the middle of it (closed on one end and threaded into another body). A steel heating element is installed in the 3/8" bore. When the Aluminum bolt expands, does the geometry of the 3/8" bore compress (tighten on the element) or expand on the element and potentially loosen?

RE: Thermal Expansion of hollow features?

Expands and will loosen. Metal expands when heated so the circumference of the ID will lengthen increasing the radius. Only issue to watch for is dissimilar metals having different CTEs.

RE: Thermal Expansion of hollow features?

(OP)
Thanks fellas!

RE: Thermal Expansion of hollow features?

Whether the 6061 hex-bolt is threaded into an aluminum or steel or other material body, and the thread classes involved, probably makes a difference.


Mike Halloran
Pembroke Pines, FL, USA

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