×
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

Residual stresses form in rolled sheet metal

Residual stresses form in rolled sheet metal

Residual stresses form in rolled sheet metal

(OP)
What are the residual stresses in flat sheet metal rolled into a cylindrical shape?  My specific problem is 316 stainless steel, 0.090 in. thick, rolled to a diameter of 30 inches, but I would like to know in general what internal stresses are formed from the sheet metal rolling process.  

RE: Residual stresses form in rolled sheet metal

A simple calculation would show that the material has to yeild to get it into the round coil.  I believe the formula for the strain is simply t/D, the thickness of the sheet divided by the diameter.  A quarter inch thick sheet, rolled into a 30 inch diameter coil results in a strain of 0.00833.  The yeild strain of 36 ksi steel is 0.00124.  So you're about 6x the yeild strain.

This causes plastic bending in the sheet, which rebounds a small amount from the bending to form an equilibrated couple in the sheet permitting it to hold its new shape.  A careful analysis could produce the degree of rebound that accommodates an equilibrium stress pattern (where the sum of the moments due to the residual stress is zero).  This shouldn't take more than half to an hour of study.  Good Luck.

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