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Science Forum Index » Materials Forum » Composite Materials for Instrument Cases, Attache Cases, Lap
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Message |
| Brendan Callahan |
 Posted: Wed Aug 27, 2003 11:20 pm |
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Guest
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Dear Group,
I am a violinist very interested in potential use of composite
materials as the exoskeleton of the case. I have been reading some of
the groups, and am a bit confused about carbon fiber versus kevlar
versus fiberglass.
Ideally the shell of the case would have the highest
strength-to-weight ratio possible, but also be waterproof and
resistant to the elements, specifically temperature changes. There
are currently cases being designed and manufactured in aluminum and
carbon fiber, but I am unaware of any potential benefits of something
like kevlar.
Also, on a few manufacturer's websites, there seem to be endless types
of carbon fiber and resin compounds - how do you find the right one.
Any book references or just plain help would be great. Also, if you
could email me, I don't check these lists often -
brendanc@wharton.upenn.edu.
Thanks a million - Brendan |
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| Uncle Al |
| Posted: Thu Aug 28, 2003 8:51 am |
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Guest
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Brendan Callahan wrote:
Quote:
Dear Group,
I am a violinist very interested in potential use of composite
materials as the exoskeleton of the case. I have been reading some of
the groups, and am a bit confused about carbon fiber versus kevlar
versus fiberglass.
Ideally the shell of the case would have the highest
strength-to-weight ratio possible, but also be waterproof and
resistant to the elements, specifically temperature changes. There
are currently cases being designed and manufactured in aluminum and
carbon fiber, but I am unaware of any potential benefits of something
like kevlar.
Also, on a few manufacturer's websites, there seem to be endless types
of carbon fiber and resin compounds - how do you find the right one.
Any book references or just plain help would be great. Also, if you
could email me, I don't check these lists often -
brendanc@wharton.upenn.edu.
Thanks a million - Brendan
If you want charity, exert yourself to collect it.
1) How good is the material given the conditions? Kevlar is
intolerent of moisture given its anisotropic expansion.
2) How good is the material after it is dinged, how does it fail??
Fiberglas Corvettes were notorious for getting in minor bumper
thumpers, looking OK, and the next moring being totally
fractured/crazed from one end to the other.
3) What does the tooling cost?
Carbon fiber pre-preg is amazingly good stuff. So is
aluminum/scandium. Carbon fiber is incredibly stiff and strong for
the weight. The metal tolerates severe whacking without general
derating, and it can be machined (hinges, clasps) without a PhD
looking over your shoulder.
If it goes through an airport, Uncle Al would put a bit of lead foil
in there spelling out "IDIOT."
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
"Quis custodiet ipsos custodes?" The Net! |
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| jbuch |
| Posted: Thu Aug 28, 2003 9:33 am |
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Guest
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Brendan Callahan wrote:
Quote: Dear Group,
I am a violinist very interested in potential use of composite
materials as the exoskeleton of the case. I have been reading some of
the groups, and am a bit confused about carbon fiber versus kevlar
versus fiberglass.
Ideally the shell of the case would have the highest
strength-to-weight ratio possible, but also be waterproof and
resistant to the elements, specifically temperature changes. There
are currently cases being designed and manufactured in aluminum and
carbon fiber, but I am unaware of any potential benefits of something
like kevlar.
Also, on a few manufacturer's websites, there seem to be endless types
of carbon fiber and resin compounds - how do you find the right one.
Any book references or just plain help would be great. Also, if you
could email me, I don't check these lists often -
brendanc@wharton.upenn.edu.
Thanks a million - Brendan
Do you want to make a composite case?
You would do well to look at some books on home built composite
aircraft... as these are among the few books I know of for the hobby
builder. And, many of them are somewhat old.
If you just want to have a composite violin case... and you don't have
the time to read this materials newsgroup.... perhaps buying is the
option you need.
Yes, carbon/graphite fiber comes in many strengths and stiffnesses and
price ranges.... because not every application requires the ultimate in
stiffness or the ultimate in strength or the ultimate in cheapness.
And there are good reasons why the material can be made with such a
variety of properties, but it is not something that experts like to
take the time to explain to someone with little training, little
interest and little time.
I think buying is a really good thing for a busy musician.
Jim Buch
--
................................
Keepsake gift for young girls.
Unique and personal one-of-a-kind.
Builds strong minds 12 ways.
Guaranteed satisfaction
- courteous money back
- keep bonus gifts
http://www.alicebook.com |
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| Nils Dalen |
| Posted: Thu Aug 28, 2003 10:42 am |
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Guest
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Uncle Al <UncleAl0@hate.spam.net> wrote in message news:<3F4E16E4.3257D7CA@hate.spam.net>...
Quote: If it goes through an airport, Uncle Al would put a bit of lead foil
in there spelling out "IDIOT."
You might want to be more clear. The x-ray tech will just assume you
are signing your name.
Nils |
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