Carbon Nanotube Bike Frame

On Mar 31, 10:29 pm, bicycle_disciple <[email hidden]>

Quoted message said:

http://cozybeehive.blogspot.com/2008/03/carbon-nano-tube-bicycle-tech...

Experts in the materials science field are welcome to discuss the
advantages of this material. Btw, if you aren't interested in opening
the link, thats fine but keep unnecessary comments to yourself.

Sure...if you keep unnecessary comments about unnecessary comments to
yourself. 🙂~

R

RicodJour said:

On Mar 31, 10:29 pm, bicycle_disciple <[email hidden]>

Quoted message said:

http://cozybeehive.blogspot.com/2008/03/carbon-nano-tube-bicycle-tech...

Experts in the materials science field are welcome to discuss the
advantages of this material. Btw, if you aren't interested in opening
the link, thats fine but keep unnecessary comments to yourself.

Sure...if you keep unnecessary comments about unnecessary comments to
yourself. 🙂~

Was that necessary?

Bill "commenting" S.

bicycle_disciple said:

http://cozybeehive.blogspot.com/2008/03/carbon-nano-tube-bicycle-tech...

Experts in the materials science field are welcome to discuss the
advantages of this material. Btw, if you aren't interested in opening
the link, thats fine but keep unnecessary comments to yourself.

That "space elevator" guy also talks about carbon nanotubes as if they
already existed in industrially useful quantities.

When such materials *are* available in industrially useful quantities,
I'm willing to wager that the space elevator dude will get his long
before any bike manufacturers get theirs.

Furthermore, I'm willing to wager that the amount of buckytube, if
any, in that bike frame is comparable to the pinky-nail sized toots of
Peruvian marching powder currently being snuffled up by the bike's
marketing team.

Chalo

i'm a soon-to-be Ga. Tech graduate with some experience with aerospace
grade composites, which some bikes (like the BMCs) are certainly
comparable to, while others are not. also, i'd like to note that Easton
and BMC have been pushing this technology for at least three years.

carbon nanotubes are exciting because lab-grade materials have produced
unprecedented yield strengths. however, actual production of the
material for manufacturing purposes has proven difficult (anyone
remember the space elevator?). thus, carbon fibers are still utilized
as load-carrying members in the composite. my understanding of the
easton material is that the nanotubes disrupt crack propagation in the
matrix, improving the material's toughness. since none of the nanotubes
are aligned in one particular direction and all are significantly
shorter than the reinforcing fibers, it is unlikely that they improve
the strength of the material significantly. also, it is typical (in
almost all materials) that improved toughness means lower strength and
stiffness values. so, it is possible that the easton material is the
same strength or even weaker than other carbon fiber composites. the
BMC frames *are* a little heavier than some other high-end full carbon
frames...

as far as fatigue goes, composites in general are typically superior
metals. fatigue of the carbon material is not an issue; it is one of
its strengths. however, many carbon frames have joints and other bonds
(e.g. bottom bracket shells). these are the areas of concern for
fatigue. however, the bonds at these key locations are a function of
the manufacturing process. in other words, fatigue of carbon bicycles
is a result of how they're put together, not the material itself. the
material concerns with carbon fiber (esp. as compared to metals) are
impact strength -- since the tubes are weak through the thickness -- and
other failure modes, like delamination, absorption of moisture, UV
degredation, etc. i don't know how companies address these issues, but
the carbon bikes seem to have become much more reliable in these
respects. BMC appears to have addressed the crash-worthiness of their
bikes in improving toughness of the composite used, although i doubt
most buyers are going to see it this way. i think it's mostly a
marketing ploy to get people to buy their high-end carbon bike over
another company's.

frank

bicycle_disciple said:

Hi,

http://cozybeehive.blogspot.com/2008/03/carbon-nano-tube-bicycle-technology.html

Experts in the materials science field are welcome to discuss the
advantages of this material. Btw, if you aren't interested in opening
the link, thats fine but keep unnecessary comments to yourself.

Ron
http://cozybeehive.blogspot.com

I've shoveld a lotta [censored] in my time but this here BS takes the cake

datakoll said:

I've shoveld a lotta [censored] in my time but this here BS takes the cake

Just wait 'til a bike company with a highly paid Professional [censored]
Team, such as Trek, gets a chance with this stuff. If Trek can make so
much hay out of a cost-cutting BB shell design (the "new" Madone),
just think of what they can do with Nanotubes!

ET's say they gotta settle with Brandt

"as far as fatigue goes, composites in general are typically superior
metals"

yaaaaawwwnn who said that? Sea Ray? Saturn ?? Corvette Owners Club !!

as far as carbon goes, we need consider carbon's carbon-energy
footprint.
if you see a carbon rider-go over and [censored] onem.

datakoll aka gene daniels said:

"as far as fatigue goes, composites in general are typically superior
metals"

yaaaaawwwnn who said that? Sea Ray? Saturn ?? Corvette Owners Club !!

as far as carbon goes, we need consider carbon's carbon-energy
footprint.
if you see a carbon rider-go over and [censored] onem.

All the cyclists I have seen have been carbon based lifeforms eating
carbon based foods.

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful

datakoll aka gene daniels said:

ET's say they gotta settle with Brandt

ET phone Brandt.

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful

My newsreader's column breaks turned the subject line into "EXTRA
TERRESTRIALS LAND AT KENNEDY SPA", which was ever so much more amusing
than the full one.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

On Tue, 01 Apr 2008 22:00:18 -0500, Tom Sherman

may have said:

datakoll aka gene daniels said:

ET's say they gotta settle with Brandt

ET phone Brandt.

Isn't he in Alaska at the Iditarod finish?

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

* * Chas said:

"datakoll" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"as far as fatigue goes, composites in general are typically superior
[to?] metals"

Composites aren't metals as such. There are many forms of metal matrix
composites but they are metals with non metallic inclusions such as
silicon carbide or aluminum oxide particles added to them or composites
that include metal.

Carbon fiber reinforced composites are most often made of epoxy resin that
encapsulates the carbon fibers much like the processes used to make
fiberglass.

My Kingdom for a "to"?

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful

"datakoll" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"as far as fatigue goes, composites in general are typically superior
metals"

Composites aren't metals as such. There are many forms of metal matrix
composites but they are metals with non metallic inclusions such as
silicon carbide or aluminum oxide particles added to them or composites
that include metal.

Carbon fiber reinforced composites are most often made of epoxy resin that
encapsulates the carbon fibers much like the processes used to make
fiberglass.

Chas.

Werehatrack said:

My newsreader's column breaks turned the subject line into "EXTRA
TERRESTRIALS LAND AT KENNEDY SPA", which was ever so much more amusing
than the full one.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

God lives here

* * Chas said:

"datakoll" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"as far as fatigue goes, composites in general are typically superior
metals"

Composites aren't metals as such.

I think it was just a typo for "superior to metals".

Frank W. Marrs III said:

i'm a soon-to-be Ga. Tech graduate with some experience with aerospace
grade composites, which some bikes (like the BMCs) are certainly
comparable to, while others are not. also, i'd like to note that Easton
and BMC have been pushing this technology for at least three years.

carbon nanotubes are exciting because lab-grade materials have produced
unprecedented yield strengths. however, actual production of the
material for manufacturing purposes has proven difficult (anyone
remember the space elevator?). thus, carbon fibers are still utilized
as load-carrying members in the composite. my understanding of the
easton material is that the nanotubes disrupt crack propagation in the
matrix, improving the material's toughness. since none of the nanotubes
are aligned in one particular direction and all are significantly
shorter than the reinforcing fibers, it is unlikely that they improve
the strength of the material significantly. also, it is typical (in
almost all materials) that improved toughness means lower strength and
stiffness values. so, it is possible that the easton material is the
same strength or even weaker than other carbon fiber composites. the
BMC frames *are* a little heavier than some other high-end full carbon
frames...

as far as fatigue goes, composites in general are typically superior
metals. fatigue of the carbon material is not an issue; it is one of
its strengths. however, many carbon frames have joints and other bonds
(e.g. bottom bracket shells). these are the areas of concern for
fatigue. however, the bonds at these key locations are a function of
the manufacturing process. in other words, fatigue of carbon bicycles
is a result of how they're put together, not the material itself. the
material concerns with carbon fiber (esp. as compared to metals) are
impact strength -- since the tubes are weak through the thickness -- and
other failure modes, like delamination, absorption of moisture, UV
degredation, etc. i don't know how companies address these issues, but
the carbon bikes seem to have become much more reliable in these
respects. BMC appears to have addressed the crash-worthiness of their
bikes in improving toughness of the composite used, although i doubt
most buyers are going to see it this way. i think it's mostly a
marketing ploy to get people to buy their high-end carbon bike over
another company's.

frank

[...]

Interesting information, thanks.

Ozark Bicycle said:

datakoll said:

I've shoveld a lotta [censored] in my time but this here BS takes the cake

Just wait 'til a bike company with a highly paid Professional [censored]
Team, such as Trek, gets a chance with this stuff. If Trek can make so
much hay out of a cost-cutting BB shell design (the "new" Madone),
just think of what they can do with Nanotubes!

I don't know. They weren't able to sell too many people on the magic
of Boron.

Quoted message said:

On Apr 1, 7:15 am, Ozark Bicycle

Quoted message said:

On Apr 1, 1:22 am, datakoll <[email hidden]> wrote:

Quoted message said:

Quoted message said:

I've shoveld a lotta [censored] in my time but this here BS takes the cake

Quoted message said:

Just wait 'til a bike company with a highly paid Professional [censored]
Team, such as Trek, gets a chance with this stuff. If Trek can make so
much hay out of a cost-cutting BB shell design (the "new" Madone),
just think of what they can do with Nanotubes!

I don't know. They weren't able to sell too many people on the magic
of Boron.

I don't know about boron, but my bike is powered by moron.