|
|
Thread Tools | Display Modes |
#21
|
|||
|
|||
Cellulose stronger than steel. Wood pulp stronger than CF.
On Mon, 4 Jan 2016 20:24:29 -0800 (PST), Andre Jute
wrote: On Tuesday, January 5, 2016 at 1:51:12 AM UTC, Jeff Liebermann wrote: On Mon, 4 Jan 2016 14:45:58 -0800 (PST), Andre Jute wrote: I sit corrected and I think you might mean an Apple Watch instead of a Rolex. Heh-heh. I don't wear a watch but I suppose I could strap a free Apple watch to the handlebars of my bike to report my heart rate from my Polar H7 sensor. See right at the bottom: http://coolmainpress.com/andrejutewatches.html Nice watch collection. I'm not sure how well a mechanical timepiece might work on a bicycle which is subject to shocks and bounces. Incidentally, on the topic of werewolves (1997): http://members.cruzio.com/~jeffl/nooze/werewolf.txt Congratulations on "computah". That's a bit premature. I'll be happy when it shows up on the Google trend and ngram counters: https://www.google.com/trends/explore#q=computah https://books.google.com/ngrams/graph?content=computer%2C+computah -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Ads |
#22
|
|||
|
|||
Cellulose stronger than steel. Wood pulp stronger than CF.
On Tuesday, January 5, 2016 at 4:51:33 AM UTC, Jeff Liebermann wrote:
Incidentally, on the topic of werewolves (1997): http://members.cruzio.com/~jeffl/nooze/werewolf.txt Witty story. Andre Jute |
#23
|
|||
|
|||
Cellulose stronger than steel. Wood pulp stronger than CF.
On Mon, 4 Jan 2016 08:17:20 -0800, sms
wrote: On 1/3/2016 6:05 PM, Jeff Liebermann wrote: "Wood pulp extract stronger than carbon fiber or Kevlar" http://www.gizmag.com/cellulose-nanocrystals-stronger-carbon-fiber-kevlar/23959/ Prepared properly, CNCs are stronger and stiffer than Kevlar or carbon fibers... "Biodegradable fibers as strong as steel made from wood cellulose" http://www.gizmag.com/steel-strong-fibers-wood-cellulose/32432/ ...claim to have developed a way to make cellulose fibers stronger than steel on a strength-to-weight basis. Soon everyone will be riding on wood pulp or cellulose fiber bicycles. Can John drill holes in it? Why ever not? After all, high strength material doesn't have to be "hard" material. But then, I would expect that is probably news to one who so obviously knows so little about so many things. -- cheers, John B. |
#24
|
|||
|
|||
Cellulose stronger than steel. Wood pulp stronger than CF.
On Tue, 05 Jan 2016 07:07:00 +1000, James
wrote: On 05/01/16 03:17, Jeff Liebermann wrote: On Mon, 4 Jan 2016 10:37:48 -0000 (UTC), Edmund wrote: On Sun, 03 Jan 2016 18:05:01 -0800, Jeff Liebermann wrote: "Wood pulp extract stronger than carbon fiber or Kevlar" http://www.gizmag.com/cellulose-nano...-carbon-fiber- kevlar/23959/ Prepared properly, CNCs are stronger and stiffer than Kevlar or carbon fibers... "Biodegradable fibers as strong as steel made from wood cellulose" http://www.gizmag.com/steel-strong-fibers-wood-cellulose/32432/ ...claim to have developed a way to make cellulose fibers stronger than steel on a strength-to-weight basis. Soon everyone will be riding on wood pulp or cellulose fiber bicycles. Without reading the article : Just read between the lines. Stronger then steel on a strength to weight basis isn't very spectacular and no reason at all to use on a bicycle. Strength to weight ratio is also known as specific strength: https://en.wikipedia.org/wiki/Specific_strength Click on the "specific strength" column heading to sort by specific strength. Scraping the data for cycling relevant materials: Material Specific Strength kN-m/kg Carbon Fiber 2457 Glass Fiber 1307 Balsa Wood 521 Bainite 321 Titanium 228 Aluminum 204 (7075-T6) Stainless Steel 63.1 (304) Simple Alu is at least twice as strong as steel on a strength to weight basis. Nope. Bainite and 7075-T6 are about the strongest steel and aluminum alloys available. Looks like steel is about 50% stronger on the basis of tensile strength to weight ratio. The value for carbon fibre is a little misleading I suspect. I doubt it takes into account the mass of the glue used to keep the fibres together - without which Carbon Fibre is not very useful. Balsa Wood however.... The number (above) for Carbon Fiber is the usually quoted figure for the carbon fiber itself. A Carbon Fiber composite would be less although how much less depends on the specific composite. While I don't have the numbers for a strength to weight ration the tensile strengths for various materials a Carbon steel (1090) - 650 MPa Aluminum - 248 Carbon Fiber - 4127 Carbon Fiber Laminate - 1600 Note this is the tensile strength at deformity, not ultimate, and some materials deform to a larger amount before failure. Glass, for example deform very little before failure while most metals will deform greatly before failure. -- cheers, John B. |
#25
|
|||
|
|||
Cellulose stronger than steel. Wood pulp stronger than CF.
On Monday, January 4, 2016 at 6:51:52 AM UTC-5, John B. wrote:
On Sun, 03 Jan 2016 18:05:01 -0800, Jeff Liebermann wrote: "Wood pulp extract stronger than carbon fiber or Kevlar" http://www.gizmag.com/cellulose-nanocrystals-stronger-carbon-fiber-kevlar/23959/ Prepared properly, CNCs are stronger and stiffer than Kevlar or carbon fibers... "Biodegradable fibers as strong as steel made from wood cellulose" http://www.gizmag.com/steel-strong-fibers-wood-cellulose/32432/ ...claim to have developed a way to make cellulose fibers stronger than steel on a strength-to-weight basis. Soon everyone will be riding on wood pulp or cellulose fiber bicycles. After reading about how to make micro fibers and then bind them into larger strands I suspect that the NEW$ bikes will likely cost more then carbon fiber :-) -- cheers, John B. http://www.upi.com/Science_News/2016...8371452003034/ |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Carbon fork legs & alum steerer stronger than steel bearings? | [email protected] | Techniques | 9 | November 24th 08 11:18 PM |
which is stronger? | Smilymarco | Unicycling | 1 | May 19th 08 10:34 PM |
which is stronger? | Kyle_Destroyer | Unicycling | 0 | May 19th 08 09:48 PM |
which is stronger, 28" steel or aluminum? | tonyfranciozi | Techniques | 18 | August 6th 07 09:33 PM |
Who is stronger | Bill benson | Australia | 14 | July 21st 04 12:55 PM |