>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>Sent: 30 January 2006 11:33
>To: Microcontroller discussion list - Public.
>Subject: [OT]: Mechanical Strength of a Bolt
>
>
>I need to know the strength of a bolt.
>
>It is rated 10.9, so i think it's strength is 1000N/mm2 when 
>pulling it.
>
>If i use this bolt to join 2 elements, which try to shift 
>against each other, how do i calculate the maximum force it can stand?
>
>      ^
>      |  F
>      |
>     111
>     111
>     111222
>     111222
>     111222
> BBBBBBBBBBBBBBB
> BBBBBBBBBBBBBBB
>     111222
>     111222
>     111222
>        222
>        222
>        222
>         |
>         |  F
>         V
>
>B = bolt
>1 = element 1 pulling up
>2 = element 2 pulling down
>F = maximum shearing foce it can stand
>
>thanx!
>tino

A quick google reveals that a rule of thumb is that shear strength = 0.6 * tensile strength.  Note that in most assemblies, the plates will be clamped together and (at least some) shear stress will be taken by the friction between the plates.

Regards

Mike

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