HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Engineering Materials
One-Piece Carbon Composite Wheel Drives Cars
8/13/2012

The one-piece CR-9 front wheel weighs 7kg (15.73 pounds), has a rim diameter of 19 inches, and attaches to metal hardware with a patented joint system under dynamic loading conditions. (Source: Carbon Revolution)
The one-piece CR-9 front wheel weighs 7kg (15.73 pounds), has a rim diameter of 19 inches, and attaches to metal hardware with a patented joint system under dynamic loading conditions.
(Source: Carbon Revolution)

Return to Article

View Comments: Oldest First|Newest First|Threaded View
Page 1/2  >  >>
Beth Stackpole
User Rank
Blogger
Lightweight and still good looking
Beth Stackpole   8/13/2012 7:58:05 AM
NO RATINGS
Looks like a really important development effort. Not only does the wheel help with the lightweighting strategies of automotive OEMs, I'd say it's still pretty good looking. Given that style is such an important element of car selection, I'd say any kind of modifications to materials or appearance in the name of lightweighting vehicles still has to have an appeal to consumers and I think this example satisfies both.

TJ McDermott
User Rank
Blogger
Re: Lightweight and still good looking
TJ McDermott   8/13/2012 10:48:02 AM
NO RATINGS
Paraphrasing Henry Ford (regarding the Model T) and applying it to carbon fiber:  You can have any color you want, as long as it's black.

I predict riches for the developer of non-black carbon fiber.  Sure, you can paint it.  But if the color is part of the material, a process is saved.  Finishes wear off too.

A better way of saying it might be:  Beauty, in this case, is more than skin deep.

Sven
User Rank
Iron
Shatter
Sven   8/13/2012 5:06:04 PM
NO RATINGS
I wonder about true real world impact testing on a carbon fibre wheel.

See the old steel rims could take a curb or nasty detroit pot-hole and you could drive off with a dent in the rib.  The tire might leak some air on the way home.  A mallet or a torch and you could get it back into shape.

The aluminum wheels are usually pretty good, but occasionally I've seen a pot-hole crack the aluminum and the wheel is toast.  I've seen people weld aluminum rims, after damage, but I'd stay away from that.

Carbon fibre is brittle and shatters.  I envision hitting a curb or nasty pot-hole and having the entire wheel splinter into shards.  Most of us have seen carbon fibre at the race track and what happens during impact.

Makes me wonder.

Ann R. Thryft
User Rank
Blogger
Re: Lightweight and still good looking
Ann R. Thryft   8/13/2012 6:31:18 PM
NO RATINGS
Beth, I agree, the design of this wheel was nicely done from an esthetic standpoint, as well as from a structural standpoint.

Ann R. Thryft
User Rank
Blogger
Re: Lightweight and still good looking
Ann R. Thryft   8/13/2012 6:32:39 PM
NO RATINGS
TJ, I think you've got a great point there. Red? Electric blue? Magenta? Daffodil yellow? OTOH, I'm not sure if that's physically possible, since carbon is, well, black.

Ann R. Thryft
User Rank
Blogger
Re: Shatter
Ann R. Thryft   8/13/2012 6:35:56 PM
NO RATINGS
Sven, I think your concerns are real, but so is the crash-worthiness testing of carbon fiber made for high-volume automotive apps. Not all carbon fiber composites are made in the same way. Stay tuned for my upcoming September feature on this topic.

Sven
User Rank
Iron
Re:Shatter
Sven   8/13/2012 7:19:35 PM
NO RATINGS
Sorry had to edit this.  Browser I was using to reply left all the spaces out. 

I look forward to it! I love technology, and I imagine there will be a huge safety factor put in. I just keep having visions of things like the time Kimi Raikkonen was on his way to win an F1 race and his rear wing let go. It put up with several G's down force--until it didn't--then it was instantly obliterated.  Ductile metals have a forgiveness as they are over loaded they fail and stretch and deform until becoming unusable. Carbon fibre is so strong but past the yield point it seems its almost instant fail. In concrete we use rebar to offset the brittleness. Maybe this carbon fibre will have some stretchy/bendy fibres???

 

Charles Murray
User Rank
Blogger
Re: Shatter
Charles Murray   8/13/2012 10:03:17 PM
NO RATINGS
Nice story, Ann. Any idea how this compares to aluminum wheels in terms of cost?

TJ McDermott
User Rank
Blogger
Re: Lightweight and still good looking
TJ McDermott   8/13/2012 10:14:52 PM
NO RATINGS
The only impossible thing is skiing through a revolving door.

If there's incentive enough, a chemist and the company backing him are going to be very rich.

You've forgotten carbon comes in several forms (cough cough diamond cough cough).  It's clear, fiber's been black all this time.  Surely there's some room in the middle for a bit of color.  Maybe the fibers are carbon nano-tubes, and the interiors can be filled with a colored element.

I wish I had the capital.  I see a mint in the making.

bob from maine
User Rank
Platinum
Re: Lightweight and still good looking
bob from maine   8/14/2012 10:25:22 AM
NO RATINGS
Gee, I don't know - why would you pay the price for carbon and then not show-it-off? Isn't that part of the glamour? I do know that people have added pigment to the resin on some carbon assemblies. It is, after all FRP, so you can make the plastic any color you want. I'm much more impressed with the fastenings. So far, if you want to connect a carbon fiber assembly to something, you must either bond it, or use fasteners which typically create such high point loads that the carbon assembly fractures. There is great potential in this technology though I'd guess cost will be the major factor in implementing it.

Page 1/2  >  >>
Partner Zone
More Blogs from Engineering Materials
The Strati EV car printed at IMTS is made of SABIC's LNP STAT KON AE003. SABIC tells Design News why this carbon fiber-reinforced compound was chosen by Local Motors and Oak Ridge National Laboratories.
NASA's MAVEN spacecraft has entered Mars' atmosphere, carrying instruments to help Earthlings figure out what happened to it. Launched last November, the spacecraft arrived at the red planet right on time after a journey of 442 millionmiles.
More bioplastic materials have entered the 3D-printable filament fray. These PLA formulations reinforced with wood or bamboo fibers will debut at the October Composites Europe show in Germany.
Airbus Defence and Space has 3D printed titanium brackets for communications satellites. The redesigned, one-piece 3D-printed brackets have better thermal resistance than conventionally manufactured parts, can be produced faster, cost 20% less, and save about 1 kg of weight per satellite.
At IMTS last week, Stratasys introduced two new multi-materials PolyJet 3D printers, plus a new UV-resistant material for its FDM production 3D printers. They can be used in making jigs and fixtures, as well as prototypes and small runs of production parts.
Design News Webinar Series
9/25/2014 11:00 a.m. California / 2:00 p.m. New York
9/10/2014 11:00 a.m. California / 2:00 p.m. New York
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Oct 20 - 24, How to Design & Build an Embedded Web Server: An Embedded TCP/IP Tutorial
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: October 2
Sponsored by Altera
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service