From: George Anderson 
To: Bill Kelley 
CC: atm , Adler 
Reply-To: George Anderson 


Thanks Bill

The aluminum that I plan on experimenting with is an 8" diameter
extrusion, so in reference to Richards thoughts the crystaline structure
should be oriented vertical through the axis of the mirror. Not sure if
I'll run into any stress problems.

George

Clear skies and good health

Bill Kelley wrote:
>
> George,
> Given what you have said, no problem. The FEM program would require
> different input since the physical properties of
> aluminum differ from glass.
> I've forwarded this question to Alan.
> Bill Kelley
>
> ----- Original Message -----
> From: "George Anderson" 
> To: "atm" 
> Sent: Saturday, January 18, 2003 9:23 PM
> Subject: ATM Flexing aluminum
>
> >
> > I have a question for Bill Kelly, Alan Adler, and others who flex.  :^)
> > The inteded is 8" diam f/5.
> > What would the feasability be of flexing a 0.75" thick
8" diameter
> > aluminum (say 6061 Al) mirror?
> > Or would a 0.50 thick slab be a better idea?
> > This is ignoring the other flaws with making a metal mirror.
> > Just a thought but would appreciate the feedback.
> >
> >
> >

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