I'd second Lee's advice.

You can't predict what's going to happen unless you know a lot more 
about the details of the way the board is mounted. I'd say that it's up 
to the customer to verify the structural integrity unless you feel that 
stress analysis is a service you're competent to provide (at a cost..)

Is it single sided?

Regards,



Lee parker wrote:
> Pradeep
>
> I would be careful about this. Most likely you will not be spinning about one of the principal axes. In that case the board will behave much like a tire that has not been dynamically balanced. This will place additional stress upon the solder joints as well as the board. You can get a close estimate of the inertial loads using classical mechanics. I would perform the calculations before going forward.
>
> Best regards
> Lee
> J. L. Parker Ph. D.
> JLP Consultants LLC
> 804 779 3389
>   ----- Original Message ----- 
>   From: Pradeep Menon<mailto:[log in to unmask]> 
>   To: [log in to unmask]<mailto:[log in to unmask]> 
>   Sent: Monday, December 14, 2009 8:05 PM
>   Subject: [TN] Tensile strrength
>
>
>   We have one of our customers who will be mounting a 6 layer PCB of size
>   110x45mm on a shaft which will be rotating at 13000 rpm. The pcb is
>   mounted on a supporting plate with 3 -6 mounting points. He wanted our
>   suggestion on whether he can use normal FR4 or he should be going with a
>   metal core PCB. The board is 1.6mm thick.
>
>   We felt that FR4 might be sufficient and the bond strength of the
>   components mounted on the board will be more critical than the PCB tensile
>   strength. We felt since thermal management is not an issue in this case,
>   metal core may not be required. Will tensile strength of the board be a
>   critical parameter in this case and if so, any inputs on what can be
>   suggested. Any other suggestions for this application.
>
>   Rgds
>
>   Pradeep
>
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>   

-- 
Eric Christison Msc
Mechanical Engineer
Consumer & Micro group
Imaging Division

STMicroelectronics (R&D) Ltd
33 Pinkhill
Edinburgh EH12 7BF
United Kingdom

Tel:	+44 (0)131 336 6165
Fax:	+ 44 (0)131 336 6001

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