The use of carbon fiber as a high-tech material on bicycles has been the most recent decade. Strictly speaking, carbon fiber is not simply a carbon element, but a mixture of carbon elements that have been woven and then reinforced with epoxy resin. Early carbon fiber technology used for the above reasons, the use of epoxy resin will even break down in the sun. With the advancement of science and technology, the shortcomings of this excellent material are gradually being overcome. For example, the German K frame uses advanced 16K carbon fiber, which is even stronger than steel and has a lifetime warranty.
In general, carbon fiber as a bicycle material has the following characteristics:
1. Extremely light weight: 1200 grams of carbon fiber road racks have been seen everywhere. Since the mass of carbon is only 1.6 g/cm3, it is no longer a dream to make a frame of about 1 kg.
2. It has good shock absorption performance. Carbon fiber can effectively absorb vibrations and maintain good rigidity. This feature makes it a good competitive grade material.
3. Can make various shapes of frame. Unlike the general metal frame manufacturing process, the carbon fiber frame is generally made of molds first, then carbon fiber sheets are put on the molds, and finally, the epoxy resin is used for fixing. This production process can use aerodynamics to create a frame with minimal wind resistance.
The current problems with this material are mainly the following two points:
1. Complex stress calculations. The carbon fiber frame is composed of carbon fiber, which is characterized by strong tensile strength, but weak shear strength. It requires complex stress calculations (longitudinal rigidity and transverse rigidity) during processing, and superposition molding of carbon fiber sheets according to calculations. In general, carbon fiber impact resistance is quite good and puncture resistance is poor. That means that if you slam horizontally, it doesn't matter if you're afraid that it's a sharp pebble in the process of slamming the vertical shot. It's not something you can fix by welding.
2. The price is high, compared with titanium alloy, carbon fiber frame prices are even worse than the price of carbon fiber frame to the top tens of thousands, while the price of the C40 and C50 in Corongo even more than 20,000 yuan. This is mainly because the manufacturing process of carbon fiber frames requires a lot of manual work, and the scrap rate is high, causing a large increase in costs.
From the appearance we can easily distinguish the frame. Rough style, modeling wild aluminum frame; tube slim, full of bone is the steel frame; and that there is no coating, the metal frame is exudes a metallic sheen is titanium frame; carbon fiber surface is covered with a variety of 3D cloth The surface is very modern.
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