Hi,

 I assume it is spinning around the long axis! :-)

 Have you applied classical dynamics to determine the forces on the board? 

 I would think there is going to be a lot of air turbulence which will
excite any resonances. 

 Wow, interesting problem.

Bob Kondner

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Pradeep Menon
Sent: Monday, December 14, 2009 8:05 PM
To: [log in to unmask]
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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