Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-25-03, 10:57 AM   #1
live311
Heeeeeere's Johnny!
Thread Starter
 
live311's Avatar
 
Join Date: Mar 2003
Location: central CT
Bikes: DeBernardi Zona, Trek 7.1 FX
Posts: 413
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Good read on frame metallurgy

While searching for some technical info on titanium bicycle frames, I found a web site with good articles on the technical properties and procedures for making bicycle frames from steel, aluminum, titanium, and carbon fiber. I don't know if it's been posted before. The DB problem seems to have erased a lot of threads.

http://www2.sjsu.edu/orgs/asmtms/artcle/articl.htm
live311 is offline   Reply With Quote
Old 09-27-03, 05:54 AM   #2
Cyclepath
Senior Member
 
Join Date: Sep 2003
Location: Willimantic, Connecticut
Bikes: '70s Puch sport tourer, '90 Peugeot Success.
Posts: 499
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks, Live, fascinating. Also confirms the point i made on one of that other threads, that steel (& Ti) can be flexed an infinite # of times as long as the stress is below their failure threshold. (Alu on the other hand will eventually fail after a certain # of stress cycles).

BTW, why are bike tubes round (or roundish) in cross section as opposed to square, triangular, I-beam shaped, etc?

How many miles should i expect from my Sakae Litage aluminum road fork? It's treated gently.
Cyclepath is offline   Reply With Quote
Old 09-27-03, 02:27 PM   #3
khuon
DEADBEEF
 
khuon's Avatar
 
Join Date: Aug 2002
Location: Catching his breath alongside a road near Seattle, WA USA
Bikes: 1999 K2 OzM, 2001 Aegis Aro Svelte
Posts: 12,242
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The article is really quite good. I hope it gets updated as newer metallurgical techniques show up. For instance, there are plenty of exciting things happening in the world of carbon fibre such as high-strength nanotubes that promise being 10,000 times thinner than current commercial grade fibres with about 10 times the stiffness.
__________________
1999 K2 OzM 2001 Aegis Aro Svelte
"Be liberal in what you accept, and conservative in what you send." -- Jon Postel, RFC1122
khuon is offline   Reply With Quote
Old 09-27-03, 07:05 PM   #4
Cyclepath
Senior Member
 
Join Date: Sep 2003
Location: Willimantic, Connecticut
Bikes: '70s Puch sport tourer, '90 Peugeot Success.
Posts: 499
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Maybe, khuoun, but that can't beat the results i get with my new super-alloy, Nonexistium. The only drawback is that each bike will cost $2.4 million, but i already have reservations from Bill Gates & several other customers.
Cyclepath is offline   Reply With Quote
Old 09-27-03, 07:39 PM   #5
khuon
DEADBEEF
 
khuon's Avatar
 
Join Date: Aug 2002
Location: Catching his breath alongside a road near Seattle, WA USA
Bikes: 1999 K2 OzM, 2001 Aegis Aro Svelte
Posts: 12,242
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally posted by Ebro38
Maybe, khuoun, but that can't beat the results i get with my new super-alloy, Nonexistium. The only drawback is that each bike will cost $2.4 million, but i already have reservations from Bill Gates & several other customers.


There has been much research done in the field of vapor grown carbon fibre and nanotubes. The miltary (USAF) has conducted experiments with a materials development contractor and successfully produced cost-effecitve nanofibers that will lower the cost of current commercial grade CF from around $25/lbs to around $3/lbs. The increase in stiffness and strength with a substantial decrease in size means that material can be made much slimmer with a significant reduction in weight.
__________________
1999 K2 OzM 2001 Aegis Aro Svelte
"Be liberal in what you accept, and conservative in what you send." -- Jon Postel, RFC1122
khuon is offline   Reply With Quote
Old 09-27-03, 10:04 PM   #6
oxologic
Senior Member
 
Join Date: May 2002
Location: Singapore
Bikes:
Posts: 566
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Carbon fibres, yeah. But nanotubes? What's that? Are they essentially the same thing?

Ebro38, any discount on your bike with the new super-alloy, nonexistium? Sounds great, should be able to let me win the tour de france!
oxologic is offline   Reply With Quote
Old 09-27-03, 10:22 PM   #7
khuon
DEADBEEF
 
khuon's Avatar
 
Join Date: Aug 2002
Location: Catching his breath alongside a road near Seattle, WA USA
Bikes: 1999 K2 OzM, 2001 Aegis Aro Svelte
Posts: 12,242
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally posted by oxologic
Carbon fibres, yeah. But nanotubes? What's that? Are they essentially the same thing?
Currently available carbon fibre is about 8 micrometers thick. Nanotube fibres or nanofibres are about 0.4 nanometers thick.
__________________
1999 K2 OzM 2001 Aegis Aro Svelte
"Be liberal in what you accept, and conservative in what you send." -- Jon Postel, RFC1122
khuon is offline   Reply With Quote
Old 09-28-03, 02:54 AM   #8
Cyclepath
Senior Member
 
Join Date: Sep 2003
Location: Willimantic, Connecticut
Bikes: '70s Puch sport tourer, '90 Peugeot Success.
Posts: 499
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
We don't anticipate any discounts on Nonexistium bikes. The metal is known to occur only on one particular closely-guarded asteroid in another solar system. My advice is to wait for a second-hand example.
Cyclepath is offline   Reply With Quote
Old 09-28-03, 04:41 AM   #9
oxologic
Senior Member
 
Join Date: May 2002
Location: Singapore
Bikes:
Posts: 566
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Oh yeah? So where should Nonexistium be placed in the periodic table? If it can't be placed in the periodic table, there must be seriously something wrong with the periodic table.

No discounts? Nevermind, I can wait a few billion years to get my hands on that bike. Do you have any distributors where I can test ride one? hehes
oxologic is offline   Reply With Quote
Old 09-28-03, 06:00 AM   #10
Jonny B
Not-so-Senior Member
 
Join Date: Jul 2003
Location: Norfolk, England
Bikes: Orbea Enol roadie, Fly Micromachine BMX, Fort Track fixed
Posts: 805
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Nonexistium is a super-alloy, it's made of a number of different metals, so it's not on the pediodic table at all.
Jonny B is offline   Reply With Quote
Old 09-28-03, 01:15 PM   #11
Cyclepath
Senior Member
 
Join Date: Sep 2003
Location: Willimantic, Connecticut
Bikes: '70s Puch sport tourer, '90 Peugeot Success.
Posts: 499
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The Nonexistium bike can be test-ridden at Alpha Centauri CycleShop. Website under construction. It's off the beaten track but well worth the trip.

(Note: Nonexistium bike not warranted to weigh the same on every planet.Check your local gravity).
Cyclepath is offline   Reply With Quote
Old 09-28-03, 07:41 PM   #12
roadbuzz
Just ride.
 
roadbuzz's Avatar
 
Join Date: Oct 2000
Location: C-ville, Va
Bikes:
Posts: 3,245
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I doubt the article will be updated. I think it was originally a series of installments for VeloNews, or some other cycling periodical 8 or 10 years ago (maybe more!).

The author, Scot Nicol, was the founder of Ibis Bicycles, which I think went bankrupt last year. I'm sure he's still doing something in the bike business.
roadbuzz is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 12:43 AM.