CDC end plate

[Tim Whitlatch <whitey@jlab.org>]

Hi Elke/Elton,

After our conversation about end plate deflection, I looked up my 
calculations.
The downstream endplate (6mm carbon/epoxy) would deflect 13 mm with a 
55g tension from each wire, 9 mm with 37g tension. This assumes straws 
do nothing and the wire tension remains constant and upstream plate is 
rigid. If we take the straws as they are, this number goes below 50 
microns.

The tension in the wires would go to zero after a deflection of 5 mm, 
therefore the actual deflection would probably be somewhere below 3 mm 
without the straws contributing.

If we reduce the thickness of the straw tubes by 1/2, the buckling load 
decreases by (1/2) to the 4th power or 1/16, also, the deflection of the 
straw goes up by a factor of 4 .....


Anyway, the actual calculation can be done, it would just take some time.

Handling issues would also have to be addressed if the thickness was 
reduced.

Just my thoughts..

Tim
begin:vcard
fn:Timothy Whitlatch, PE
n:Whitlatch;Timothy
tel;work:757-269-5087
tel;fax:757-269-5279
version:2.1
end:vcard