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What is the advantages and disadvantages of carbon fiber bike?
2016-06-14
Inherent intrinsic properties of carbon fiber (CFRP) Carbon fiber not only has the carbon material, and both soft workability textile fibers. It accounted for less than a quarter of the steel, but the strength is very strong. And its outstanding corrosion resistance, is a new generation of reinforcing fibers. Carbon fibers are widely used in civilian, military, construction, aerospace and super sports cars. Advantages of carbon fiber chassis frame is characterized by "light, steel is good, good shock absorption,"
however, give full play to the excellent performance of carbon fiber, technically does not look so easy, the quality difference between each carbon fiber materials manufacturers also larger. Bicycle manufacturers consider the cost issue, unlikely to be used to produce high-grade carbon fiber frame. Despite these practical problems, but has the advantage of carbon fiber frame, or other materials that are not possible to produce a lightweight bicycle 8,9kg about this lightweight carbon fiber bike, climbing the hill when most can manifest its advantages, successfully climbing the hill and refreshing. And not as some light aluminum frame, while climbing the hill felt a pull back force. (1). The frame can be made lightweight carbon frames is facing the direction of the carbon fibers is laminated to stress, strength is obtained. Carbon fiber frame is very light, which is its density and stronger tensile strength composition. ZGL carbon fiber frame is very light, is the first professional production of carbon fiber Bicycles and various spare parts company. Mainland China's first production of a carbon fiber bike manufacturers. Carbon fiber frame between 1-1.2kg. (2) The shock-absorbing carbon fiber used to good use when making prosthetic leg disability movement, or special spring is used in various fields. Using its excellent performance in absorbing impact, without making shock absorbers bike.
As SCOTT plant ELEVATED frame is known. But the quality difference between the various manufacturers of large, some very hard, so after this ride frame in order to know good or bad. Basic molding method (3) can be manufactured in various shapes frame 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.
Frame disadvantage (1). Complex stress calculation constituting the carbon fiber frame is carbon fiber, which is characterized by strong tensile strength, shear strength but weak when processing requires complicated stress calculations (longitudinal rigidity, transverse rigidity), according to calculate the carbon fiber sheet molding overlap.
Processing technology manufacturers vary, you should choose an experienced and reliable manufacturers of products is very important. (2). Since it is difficult to change the size after prepare molding, it is difficult to change the size. Unable corresponding multi-size models of more orders. (3) Aging resin and therefore does not age? This is a problem exists, it will gradually turn white when it is placed in the sun. Of course, this phenomenon is related to the manufacturer's technical. Should not be placed in the sun.
Types of carbon fibers
All full carbon carbon fiber bicycle accessories all made of carbon fiber material. Many semi-carbon bicycle aluminum alloy + carbon fiber manufactured. For example, a frame, the tube may be made of carbon and other parts of the aluminum alloy (triangle using carbon or after ...), carbon fiber fork arm, fork tubes aluminum alloy, so it can be said that half of the carbon . Pack some carbon frame, handlebar, stem, crank, fork, seatpost and other accessories, manufacturers use aluminum production, and in the surface layer of carbon cloth bag, which is what carbon package.
Material environment
Carbon fibers and carbon fibers contain the relationship between the environment and therefore it can be said acid resin. However, carbon fibers, should give more consideration to internal factors, it is therefore the possibility of resin with a resin aging exists. Should avoid sunlight, and sunlight affect the temperature of the environment to its maximum carbon fibers bike is not used. Titanium relations and the environment, excellent corrosion resistance (used in atomic energy and related sectors), not afraid of rain, afraid of injuries, stained with water droplets do not wipe clean. Bicycle prepared using this material is a waste, but there are disadvantages as previously titanium (corrosion of dissimilar metals), such as aluminum and titanium parts are joined together when the parts are gradually etched. In addition to titanium, other metals can also occur between dissimilar metal corrosion, especially in parts of the seat tube, for example, the seat tube and aluminum chromium molybdenum steel frame joined together regardless of when the contact surface turns brown, and even Unable to extricate them down. Metal fatigue metal fatigue make the bicycle frame material chromium molybdenum steel, aluminum, titanium, carbon fiber and the like. Which used to produce the thinnest tube is chrome-molybdenum steel frame. Its workability is good, cheap materials, Riding feeling good, but it must
be made of thin-walled tubes, thin-walled tube there is such a high tensile strength and workability. Strength chrome-molybdenum steel is easier to gradually weaken, which is easier to fatigue phenomena seen in the following. (1) The same impact force applied to a variety of materials, the maximum stress (prone to damage caused by fatigue) chromium molybdenum steel thin tube occurred. (2) a long history of research on chromium-molybdenum steel, the maximum limit use of its features made extremely thin-walled tubes, each local site, although stress occurs, but for the entire tube is higher stress will occur . (3) Comprehensive corrosion caused by the rust will cause changes in the pipe wall, the result of this phenomenon and increase the stress caused by fatigue damage. (4). In the local stress concentration and rust, or recess caused by trauma, causing fatigue failure from there. (5) The shock generated when the race to make the frame a high stress occurs, the more the frequency of use of fatigue damage is gradually increasing. Above is mainly for chromium-molybdenum steel, aluminum alloy frame but the rapid development, there are many thin-walled aluminum tube frame production, whether they are above-chromium-molybdenum steel frame, like fatigue damage it? Especially aluminum no fatigue limit, minimal stress is bound to cause damage. The greater the damage to the stress, the shorter the time required. Extremely thin-walled aluminum frame tubes sold, none of the manufacturers clearly indicate its life.
Development process
Cycling is daily life indispensable means of transport, its low cost, easy maintenance, easy to use, loved by people around the world, forming a huge consumer market of bicycle, with the fast development of modern society, the bicycle has not only traffic and transportation, has a set of fitness, travel, competition and other features. Bicycle grade level depends on the choice of materials and workmanship. Typical low, medium and high-end bicycle frame are made of carbon steel, chrome molybdenum alloy and aluminum alloy and carbon fiber. Carbon fiber is a new type of composite material, it has a light weight, high strength, high specific stiffness advantages, but also can design and ease of formability, so that the design of the structure of higher structural efficiency. The world's progress in the development of countries in the world to develop new forms, new materials bike into a huge human, material and financial resources. Bicycle frame is the skeleton, which largely determine the shape and performance of the bicycle. United States, Britain and Taiwan, etc. have been developed to produce carbon fiber bicycle frame. The latest technology achievements China Light Industry Federation organized and hosted Lianyungang Yan Ying new materials limited liability company and Lianyungang Condor carbon fiber bike limited liability company to complete the "carbon fiber bike technology development" projects and technological achievements appraisal. Identification of the Committee experts listened to R & D projects completed units, the new investigation, detection and use of reports and field visits the production scene, agreed that Hong Kong City carbon fiber bicycle integrated production technology leading domestic and reached international advanced level of similar products . Ying Yan new materials and Condor carbon fiber bike limited liability company implemented "carbon fiber bike technology development" project, the use of independent research and development of carbon fiber and resin formulations using shaped built inflatable bag and cooling after solidification setting process, a good solution made of carbon fiber and resin composite interface after binding problem, ensure carbon fiber bicycle frame molding of technical stability. The project application in the implementation process 15 related patents, test indicators have reached the European Union certification standards, integrated technology leading domestic and reached international advanced level of similar products. The project achieved large-scale production of carbon fiber bicycle products have formed a series of varieties, and promote the use of a professional cycling team training and race car, good market prospects at home and abroad, China's bicycle industry to promote technological progress and product upgrade important.
Source:tieba
Author:OtrNhlai
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