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Brief comparison of carbon fiber bike's strengths and weaknesses
2016-06-14
EDITORIAL: Carbon fiber bike is a bicycle in the history of the fourth generation, also known as a bike "black revolution", when the carbon fiber material around the word gradually enter our Chinese friends after the ride, because its price reasons, let most ordinary riding enthusiasts shunned. However, the carbon fiber will gradually become the mainstream of the development of the bicycle. Let me introduce some of the features and analysis under the carbon fiber frame it:
First, what is a carbon fiber:
A carbon content of 95% or more of the high strength, high modulus fiber materials of new fibers. It is made of organic fiber flake graphite crystallites along the fiber axis direction from a pile, microcrystalline graphite materials by carbonization and graphitization obtained.The proportion of carbon fiber is only about 1.75, while aluminum is 2.7, steel 8.7. The intensity of it? Currently carbon fiber can be more than 7000MPa, and steel it? The best steel but is 2000MPa. Then we can calculate the strength of it? Strength carbon fiber several times higher than steel! In short, carbon fiber composite materials many times stronger than aluminum and steel!
Second, the carbon fiber frame production process and strength:
The basic method of forming the carbon fiber is spread in a mold and then flows into the resin fiber sheets and baked. Frame can be made into various shapes, such as the Y-frame TREK. Today's frame also added other materials such as Merida REACTO new series joined the nano-materials such as flax.
We can see carbon fiber frame is superposed layers of carbon cloth, and then through the cooling heat baking molding.
As for strength, then why not some carbon fiber bike looks like aluminum it? I can say this, the world's best carbon fiber, such as Japan's Toray T10, are absolutely prohibited exports to China. China currently own development and production of carbon fiber, at best, it is equivalent to Japan T3 levels, and unstable production quality. China is the world's largest no suspense cottage base, any products, China can imitate the same shape. Many riders as freeloaders in Taobao to buy hundreds of pieces of carbon components, breaking a period of time, leading out of carbon fiber monotheism frangible breakable. Why F35, the extensive use of carbon fiber on F22 fighter? Why F1 car made of carbon fiber manufacturing?
Well, it was said, and that is high-end technology, the strength of this bike that can be braided carbon fiber. Then see below:
This is Youku I readily found to video, which is a brand of carbon bicycle seat tube, video authors use the hammer, nail hammering tests, etc., we can clearly see that no deformation and rupture .
Third, carbon fiber bicycle geometry:
Participated in bicycle race or often like to watch the game with friends all know that the greatest resistance to cycling As the wind. Wind is the biggest enemy of cycling. At present, the barrier breaking wind through the car, follow the trend of flat road bike to reach the speed of 130KM.
Popular Science: The air is composed of many small and infinitely for irregular particle composition, there is a great distance between them, a thin medium can be compressed by a fast-moving object. For example, when the air is compressed in front of the shells, shells itself will directly feel a new force that the elastic force of the air. Euler This phenomenon also explains: "When the speed increases, starting from a certain speed, fluid particles are compressed, and with the increase of velocity of the object of more and more powerful, the distance between the particle decreases, the object front, increased pressure of the fluid; while the opposite its rear Thus, the object at high speed the drag on some of the large, low speed smaller. " In other words, when you are at 20 km / h velocity, if you issue the leg power of 400W, which overcomes the resistance of the air, then when you are at 40 km / h speed, you will need the power of the legs 1600W to overcome wind resistance.
Simply put, when the faster advances will be more difficult. A good flat road sprinter breaking wind must have a good teammate. Such as disk Lord Cavendish most prosperous period, his teammates Makelunxiao breaking wind.
I point this out here, just I want to tell you that the major plants in the production of the frame, will be after a very long wind tunnel testing.
Fourth, on the weight:
Patrick Release year émonda production car weighs 4.65kg.
Weight is critical for a bicycle, the result is lighter and faster, we can imagine, with a 30-kg car to walking up a slope you 30 minutes if you replaced a car climb only 10 pounds this slope, the effect I do not say.
Fifth, on my own usage feedback.
I had been riding in the car with aluminum frame, when I was a chicken dish, I really want to feel any difference between the aluminum frame. After riding a road bike two years,
I began to increase the speed to the speed reaches 40KM / H, I obviously felt I rode five-car position begins to soften, and sometimes even feel the tooth plate has a variant , and feel the power of the stampede was partially absorbed the frame.
And when I used carbon frame, I understand that I will never go touch the aluminum frame of the bike, because it is simply riding two things. Hardness carbon frame is not used people can not imagine. Five-hardness, makes you feel every stepping foot in the perfect power is transmitted to the wheels. And in the bumpy road, carbon frame obviously feel very soft, vibration feedback to the body is a large degree of reduced. I can say, carbon frame make you faster.
Sixth, about, long distance, and prices.
It was not long carbon frame or something, this is purely nonsense. In October this year, China's attack He Tintin Chengdu to Lhasa took 7 days 22 hours, he uses a carbon skeleton of domestic independent brand "attack." 2141 km, 13 mountains above 4,000 meters, has created a new record in 318 Sichuan-Tibet line.
Canon Dell CADD10, known as the king of the aluminum frame, the price is about 12800, and aluminum wheels. For example, while China's own brand: attack the full carbon price as long as 9999. I am not attacking team Tuoha, I did not attack the car ride, but others can use this trip Juji Tibet, the quality would not have said. 318 is wisdom Sichuan-Tibet road, known as China's most difficult long distance. Bijie Been fastest Tibet also took 21 days.
Why expensive carbon frame because of its production process, those above production process, wind tunnel testing, etc., coupled with our high tariffs, which is leading imported car carbon expensive reasons. Like in the United States Giant you buy, but also to buy more expensive than at home a lot.
Some people say, wow, you say all roads, none of my birds do, brother is a party years of XC, XC carbon frame dare you? So OK, let me give you a few pictures and videos on it:
Nino Schurter of Scott Scale 700:
Nino Schurter is a young but already known in the world of the legendary driver, if you love XC will also be more familiar than I am the world champion.
Full carbon frame, carbon fork, carbon wheels, let us look at the world road champion XC bar, general domestic frame in which the road ran a few laps early at this rate fell apart.
Of course, if you are following this ride, I suggest you do not use carbon fiber product. Because this game is that you do not need any stampede
And I come to talk about the disadvantages of carbon fiber bar: domestic technological backwardness, cottage groups, resulting in carbon fiber topped intolerance grass conclusions. The high-carbon foreign car prices are too high, the general riding friends can not afford. Let me say it aluminum frame, aluminum frame in why China has a large market, aluminum frame production is simple, low cost. Student party finally buy a car now, to get it to prepare for major cycling sun car, found himself not as a crank drive someone else's expensive, this situation is a problem. Of course, now we see a lot of domestic brands began to rise, such as the above said Chinese attack, fast passenger, three fire and other brands. These domestic carbon brands with low prices, quality fully able to adapt to the general riding, after all, China's independent brands still in the preliminary stage, others produce bicycles for many years, such as plum, the brand has nearly a hundred years of history, you can not take them to and plum over, right?
Cycling is a sports equipment, unlike running, swimming. "We must first of its profits." This saying for thousands of years. Many people have a misunderstanding, money exchange kit ah, the frame for what ah. I just want to ask you ride suite impact? Take today's XC mountain, it has no players use a multi-disk system. Uniform single disc.
I first played the car when he heard the sentence, the poor stand to play, play rich round two forced play kit. A price carbon wheels definitely more than your frame, so the limited funds to upgrade the frame is the fastest, most cost-effective. Of course, if you buy a carbon frame only to ride in the street to buy a dish, on a school, then forget it, because Phoenix two eight bars, too, can be done. And again you have the economic base of their own bike as indispensable interested, please do not hesitate to purchase a carbon fiber frame it! If you're a local tyrant brother, he was wealthy and interested in time and that did not hesitate to buy carbon frame carbon wheel, carbon kit now! ! ! ! ! If you have no money but it is interested in bicycle, please do not hesitate to save money to buy carbon frame it! ! !
Oh, there is a monotheistic carbon frame is five years of use, I would like to ask, this and that funny than say, misleading newcomers! ! I dare say that he has no more than amuse ride carbon frame. The so-called five-year period refers to the frame using professional athletes generally use five years need to be replaced. You can only buy four with the first 10 years of it. A regular car brand for five years normal use scrap carbon skeletons seeking FIG seek advice. On the single life, I can not say with metal ratio,
"metal fatigue" is the word could have a look at Baidu Encyclopedia. Someone had said, "wow, my car fell just fell bent Le, carbon frame Yishuai cut off." You can bend the brother ride it? Off a friend, please use the regular manufacturers frame. I do not want to burst with MOSSO recently Bijie who broke the frame.Look at these great God now, 50KM / H speed of the crash and fall cruel, right? Who frame is broken ah? ?
Source:tieba.baidu.com
Author:zhiweiyirenhouse
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