×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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

Allowable shear stresses in shafts

thread723-108772

Allowable shear stresses in shafts

Allowable shear stresses in shafts

(OP)
When designing a hollow circular drive shaft, what is the allowable shear stress in the shaft? How does the allowable shear stress relate to UTS or yield strength of the material (in this case 304 S/S)? Is it correct to say that the allowable shear stress is independant of cross section because it is a material property?

Background:
We had a drive shaft fail and I am trying to work out the allowable torques in some components of the drive system to make sure that all components are matched correctly, but need the allowable shear stresses to do this.

Thanks.

RE: Allowable shear stresses in shafts

Design stresses are commonly equal to 2/3 yield stress and the allowable shear stress is normally half the design stress. Allowable stresses are independent of shape, yes.

If you've had a shaft fail then the probable cause is fatigue of a rotating component. You need to look at where it failed and what the stress concentration is there. There are additional factors you also need to consider such as surface finish, size of the component etc. when looking at fatigue. When the stress is calculated then compare that with the fatigue stress limit in rotating bending.

corus

RE: Allowable shear stresses in shafts

304 stainless can mean so much, be specific, manufacturer, state, location and time of manufacturing.

Also look at the storage time and conditions of the stock. I fthe world was perfect than 304 would be also!!

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

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