| Topic: |
Science > Physics |
| User: |
"Bernhard Kuemel" |
| Date: |
28 Aug 2005 05:25:02 AM |
| Object: |
spring vibrations in space |
Hi sp!
No, this is not about a music festival :). I am wondering, how long
a spring would keep vibrating in 0 gravity (free fall) vacuum. How
ideal are our best elastic materials?
Bernhard
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| User: "Sam Wormley" |
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| Title: Re: spring vibrations in space |
28 Aug 2005 08:09:33 AM |
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Bernhard Kuemel wrote:
No, this is not about a music festival :). I am wondering, how long a
spring would keep vibrating in 0 gravity (free fall) vacuum. How ideal
are our best elastic materials?
Internal friction
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| User: "AJW" |
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| Title: Re: spring vibrations in space |
28 Aug 2005 09:34:26 AM |
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SOme things like tuning forks have Qs in the 1000s. The energy loss
goes to moving air and to internal heating.
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| User: "Autymn D. C." |
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| Title: Re: spring vibrations in space |
29 Aug 2005 07:15:20 PM |
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http://www.liquidmetal.com/media/ball_bounce_DSL.mov
Make a spring out of stabilised hassium glass microfibres, and you're
set for life. If any substance can be turned into a fononic crustal at
some temperature and pressure, then "internal friction" can be
eliminated and one'll have a substance that imitates the Stargate's
event horizon. Whither then, stick with a Brownian spring.
-Aut
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| User: "Monitek" |
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| Title: Re: spring vibrations in space |
29 Aug 2005 11:45:25 PM |
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"Autymn D. C." <lysdexia@sbcglobal.net> wrote in message
news:1125360920.438438.293900@o13g2000cwo.googlegroups.com...
http://www.liquidmetal.com/media/ball_bounce_DSL.mov
Make a spring out of stabilised hassium glass microfibres, and you're
set for life. If any substance can be turned into a fononic crustal at
some temperature and pressure, then "internal friction" can be
eliminated and one'll have a substance that imitates the Stargate's
event horizon. Whither then, stick with a Brownian spring.
-Aut
The above website is long on hype and short on physical properties.
As far as the Liquid metal is concerned, strange name its a solid, if it is
harder than tool steel then it will be like glass ie brittle the strength
factor of 2 - 3 times is half that of the theortical limit for a dislocation
free material so there must still be some order there ie its not truely
amorphous.
Lastly there is no mention of fatigue properties in amongst all the hype.
Regards,
Monitek
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| User: "Autymn D. C." |
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| Title: Re: spring vibrations in space |
30 Aug 2005 03:39:21 PM |
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Monitek wrote:
The above website is long on hype and short on physical properties.
So the movie doesn't count?
As far as the Liquid metal is concerned, strange name its a solid, if it is
harder than tool steel then it will be like glass ie brittle the strength
factor of 2 - 3 times is half that of the theortical limit for a dislocation
free material so there must still be some order there ie its not truely
amorphous.
Why can't you write coherently? Glass is not brittle; crustal is
brittle. Glass breaks along /crustal/, not glass, defects.
Lastly there is no mention of fatigue properties in amongst all the hype.
Better than metallic crustal, at least. The material is used for
hinges already. Break open a theft-deterrent tag if you get the chance
and try to wring the "plastic-metal".
-Aut
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