FredGarvin - Question For You Please

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Discussion Overview

The discussion revolves around compressive stresses in ball and socket type bearings, specifically seeking clarification on an equation referenced by a participant in a previous thread. Participants are looking for background information on the equation's source and related concepts.

Discussion Character

  • Technical explanation
  • Meta-discussion

Main Points Raised

  • FredGarvin seeks information on the source of an equation related to compressive stresses in bearings, referencing a past discussion.
  • Some participants suggest contacting FredGarvin directly via private message (PM) for further clarification.
  • One participant humorously claims to be an official agent for FredGarvin, indicating he is currently unavailable.
  • A participant questions the method for sending a PM to FredGarvin, indicating difficulty in finding the option.
  • Another participant proposes a specific book as a potential source for the equation, linking to an Amazon page.
  • A participant identifies "Roark's Formulas for Stress and Strain" as the book in question, specifying the chapter and page where the equation can be found.
  • There is a mention of "Hertzian stress" or "contact stress" as relevant background information.
  • Participants discuss the reputation of Roark's work, with some expressing skepticism about its authority on stress and strain.

Areas of Agreement / Disagreement

Participants express varying levels of certainty regarding the source of the equation, with some suggesting specific texts while others question the reliability of those sources. There is no consensus on the best way to contact FredGarvin or the accuracy of the references made.

Contextual Notes

Participants express uncertainty about the PM settings of FredGarvin, indicating potential limitations in communication. The discussion also reflects differing opinions on the credibility of the referenced material.

vdash103
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FredGarvin - I didn't know how else to reach you and wasn't sure if you would receive a message if I responded to a thread that was started by someone else in which you responded. Anyhow, my question is on compressive stresses for ball and socket type bearings.

You responded to a post in 2007 on this topic and the link is: https://www.physicsforums.com/showthread.php?t=206257

I'm trying to find more information specifically what book your equation came from. I would like to read up on background information for this equation.

Any help you can give is appreciated.

Thank You
 
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vdash103 said:
FredGarvin - I didn't know how else to reach you and wasn't sure if you would receive a message if I responded to a thread that was started by someone else in which you responded. Anyhow, my question is on compressive stresses for ball and socket type bearings.

You responded to a post in 2007 on this topic and the link is: https://www.physicsforums.com/showthread.php?t=206257

I'm trying to find more information specifically what book your equation came from. I would like to read up on background information for this equation.

Any help you can give is appreciated.

Thank You

Fred hasn't posted since February, unfortunately. You might try PM'ing him, in case he is checking those messages.
 
I respond as the official agent for Fred Garvin. He is currently occupied with Lady Gaga, but will be glad to answer your questions after his shower.
 
berkeman,

Can you tell me how to PM him? I was looking for that option and couldn't find it.

Thanks
 
Danger,

Haha - thanks!
 
vdash103 said:
berkeman,

Can you tell me how to PM him? I was looking for that option and couldn't find it.

Thanks

When you are looking at a post of Fred's you left-click on their underlined user name. That exposes several options, including sending them a PM.
 
berkeman,

ah, I see now - thanks!
 
vdash103 said:
Danger,

Haha - thanks!

My pleasure. Now, please do me a favour and make sure that he never sees that post.
 
FredGarvin must have his PM settings disabled...it won't let me.
 
  • #11
The book is "Roark's Formulas for Stress and Strain" and the equation comes from Table 14-1, chapter 14, p.702 (7th edition, 2002).

For background information, look for hertzian stress or contact stress.
 
  • #12
Thanks!
 
  • #13
Notice that Fred refers to "the bible, Roark's." That is of course, Roark's Forumlas for Stress and Strain.
 
  • #14
Mech_Engineer said:
That is of course, Roark's Forumlas for Stress and Strain.
Unless Roark took lessons from my ex-wife, he has no idea about stress and strain.
 

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