Hi Jim,

I think glass  or glass-like springs are worth considering . It may not work 
in the same configuration as we now use ,but there are other configurations 
which may be more compatible with the characteristics of glass.  One 
possibility is the Galperin or symmetrical oblique configuration like the 
STS-2 and the Trillium series. The spring is used in a different mode and 
the stress is lower.

Just as we replaced the metal flexures with a plastic (Kapton) , there may 
be significant advantages in a non-metallic  spring.

Keep that thought.


Regards, Dave




--------------------------------------------------



From: "Jim Hannon" 
Sent: Monday, August 15, 2011 10:22 PM
To: 
Subject: Re: mesoanelastic complexity

> I was not thinking about ordinary glass. There have been several recent 
> articles about ultra strong and flexible glass. Such as:
> http://www.globalcommhost.com/corning/CDTContent/assets/Corning_FlexibleGlass_FactSheet.pdf
> http://www.corninggorillaglass.com/sites/all/files/COR_GG_ProdSheet.pdf
> http://www.youtube.com/watch?v=bHlQdfvdvUg
>
> Just something to keep an eye on.
>
>
> On 8/15/2011 4:46 PM, Brett Nordgren wrote:
>> Jim,
>>
>> Good thoughts, but glass and even fused silica are unfortunately quite
>> weak in tension, ~7000 psi under ideal conditions. Very few materials
>> can reliably achieve the yield strength of the 17-7 stainless we're
>> using, ~300000 psi. = 2.1 GPa.
>>
>> Perhaps before I begin seeking solutions, I will try to figure out what
>> problem I am solving. :-)
>>
>> Brett
>>
>
> -- 
> WB0TXL
> WEB Page http://www.fmtcs.com/web/jmhannon/
> Blog http://jimhannon.wordpress.com
> 42,11.90N,91,39.26W
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