×
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

pinned connection bearing stress

pinned connection bearing stress

pinned connection bearing stress

(OP)
I know this has been somewhat addressed but i often see it addressed as it relates to a bolted connection.

I want to confirm that allowable bearing stress for a pinned connection can be treated in a similar fashion as a bolted connection where allowable bearing stress equals a factor of 1.2 to 1.5 times the tensile yield.

Actual load tests confirm that we see more than 2 times this allowable bearing load before hole deformation which backs this up, however i would just like the theoretical argument to add to the test results.

thank you

RE: pinned connection bearing stress

Yes, pin loading is actually how bearing stress is tested.  You can learn more in MIL-HDBK-5 METALLIC MATERIALS AND ELEMENTS FOR AEROSPACE VEHICLE STRUCTURES and ASTM E 238 Standard Test Method for Pin-Type Bearing Test of Metallic Materials.

Regards,

Cory

Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.

RE: pinned connection bearing stress

(OP)
thanks cory.

just to confirm, i can then assume that ALLOWABLE bearing stress with a pin load (not bolt or rivet) lies somewhere in the range of 1.2 to 1.5 times the tensile yield.

This is in fact what i believe to be true, but i just want confirmation on the theoretical.  I also believe that the ALLOWABLE bearing load incorporates a safety factor of about 2 - do you also agree with that?

Test data we have is in agreement with these assumptions but a source indicated to me that the above relationship may only apply to a bolted connection where friction plays a role.

RE: pinned connection bearing stress

The allowable bearing yield stress with a pin load USUALLY is about 1 to 2 times the tension/compression yield stress.  You can look in MIL-HDBK-5 and get actual values.  For alloy steels, it is ~ 1.7.  You can get MIL-HDBK-5 free at:

http://assist.daps.dla.mil/quicksearch/

The safety factor varies with application and it is meaningless to speculate on a "typical" value.

Regards,

Cory

Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.

RE: pinned connection bearing stress

(OP)
thanks again, cory

 

RE: pinned connection bearing stress

(OP)
o.k. i'm not done beating this horse - sorry.

does anyone have a link to material property specs that would actually list the ultimate bearing strength and the yield bearing strength for grade 50 A653 steel?

I've been searching and i find that these values are very seldomly listed - probably due to e/D and t/D variability.  I have found it for some steel alloys and some aluminum but I can't find it for Grade50 A653 steel.

The values I have found for other materials seem to show that the yield bearing is about 1.75 times the tensile yield.

thanks

I think that due to the fact that i have a pinned joint with no benefit of wall stiffening from a bolted connection i want to work from specified bearing yield to obtain WLL.

RE: pinned connection bearing stress

This type of information is not published widely/at all.  I think you should estimate based on MIL-HDBK-5 data if your application is not critical, or conduct your own testing if it is critical.

Regards,

Cory

Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.

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