×
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

Solution to loose coiled spring with force applied radial from inside

Solution to loose coiled spring with force applied radial from inside

Solution to loose coiled spring with force applied radial from inside

(OP)
I need to find a solution to a loosely coiled spring with a force applied from the inside radial outward.  Any suggestions?

RE: Solution to loose coiled spring with force applied radial from inside

What type of coiled spring? Similar to compression spring? Are you intend to push a cylinder into the inside diameter?
Is this for spring clutch?

http://israelkk.googlepages.com/home

RE: Solution to loose coiled spring with force applied radial from inside

(OP)
The spring only works in tension, similar to a spring you pull out of a pen after it has been stretched beyond yeild.  Small amounts of compression will cause it to buckle.  

The spring is loaded by putting a cylinder inside the diameter.  I want to predict the force (normal force/unit length of spring) the spring will produce on the cylinder based on the unloaded diameter of the spring and the loaded diameter of the spring.

No this is not for a spring clutch.

RE: Solution to loose coiled spring with force applied radial from inside

In the book "Mechanical Analysis and Design, Arthur H. Burr, 1981. page 101" (the chapter of coil spring clutch) is given the pressure between the coils and the cylinder inside as function of the spring diameter increase as the result of the presence of the cylinder.

From this pressure and the coefficient of friction you can calculate the friction force. However, since not all coils will slip together you may have a very erratic behavior because you also stretch a spring with variable coil numbers resulting with variable spring constant and deflection per unit force.

http://israelkk.googlepages.com/home

RE: Solution to loose coiled spring with force applied radial from inside

Yes this the book why are you asking?

RE: Solution to loose coiled spring with force applied radial from inside

(OP)
I am think of buying it but its publishing date is not 1981.  It is 1995.  So I want to make sure I had the right book.

RE: Solution to loose coiled spring with force applied radial from inside

There is 1981 edition and 1995 edition. To my opinion the 1981 is better at least concerning the spring clutch chapter.

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