What are the effects of different tennis racket materials on the racket?

1960, wooden rackets occupied almost all the tennis racket market. In the1970s, metal rackets replaced most wooden rackets. Today is the world of composite materials, such as carbon fiber modern racket manufacturing, which has used materials close to aerospace industry and military products. In recent twenty years, the high development of metal materials and chemical materials has laid a solid foundation for racket manufacturing. Of course, the application of these new materials and technologies is not only caused by the fierce competition of commercial products, but also the need of the rapid progress of tennis. At present, carbon fiber, glass fiber, Keweila fiber, high-tension carbon fiber, titanium, superhard carbon fiber and other materials have been widely used in racket manufacturing materials. More and more hard rackets are constantly being made to adapt to hitting faster and more powerful balls. This revolution in racket manufacturing technology is still going on today. However, the increase of hard racket and its hardness will inevitably reduce the shock absorption and rebound performance of the racket, and it is more likely to cause damage to the hands, joints and back muscles of beginners and non-strength players. It should be noted that the hardness of the material is the goal of making a racket. However, only a racket with hard material, moderate swimming form and well-designed shock absorption system is a successful racket to adapt to the development of tennis. If it is a racket with weak shock absorption ability, a shock absorber can also be installed at the lower end of the racket face. The second is all metal, all aluminum. This kind of tennis racket feels bad, is not suitable for competition and is easy to break. (200~300 price) The third kind is alloy, which is a commonly used racket, with balanced feel and strength in all aspects. It is more suitable to buy this kind. (300~500 price) The fourth kind is carbon essence, which can generally make a big racket. Early rackets were made of ash wood by skilled technicians in small workshops. Ash wood is chosen because it is strong and easy to bend and shape. The traditional steam method is used to bend rackets, which also means that the early tennis racket manufacturers were mainly furniture manufacturers. During this period, people mainly used small wooden rackets, which are still used in competitions today. With the progress of science and technology, multi-layer boards began to replace single wood. This material is composed of many thin veneer lumber to make up for the defects of a single material. Racquets made of several kinds of wood or even different materials (such as fiberglass) are more durable. During this period, many manufacturers also tried other more exquisite designs, such as' winding' rackets and steel grooves, but the standard wooden rackets still dominated. 1953, Lacoste applied for a patent for a steel racket for the first time, fixing the strings on the racket frame with steel wires, thus solving the winding problem of the metal racket. This is the first non-wooden racket sold as a commodity. 1967 The WilsonT2000 model was sold on the market. 1969 introduced the first racket made of composite materials, using the most advanced technology at that time, aluminum and plastic. Compared with its predecessors, it is a brand-new product. 1975 The prince applied for a patent for another racket. The racket head of this kind of racket is larger and made of aluminum alloy profiles, which is stronger and lighter than wooden rackets. So this racket can be much bigger without sacrificing weight or hardness. The appearance of this racket with a bigger optimal hitting point caused an uproar in the tennis world, forcing the International Tennis Association (ITF) to change the rules of the game in 1979. The changes in the 1980s and 1990s made the sales of wooden rackets greatly frustrated, and metal or composite rackets began to become the mainstream. Dunlop 1978 applied for a patent for the production of carbon fiber rackets by injection molding. Since 1990s, bigger, lighter and stronger rackets have occupied the market, and now carbon fiber rackets occupy most of the market. Modern rackets "weave" carbon fibers on unexpanded tubes. This manufacturing method makes it possible to use other materials in the high-pressure area of the racket, so the racket can be made to be different from person to person. Compared with early wooden rackets, the head of modern rackets is 40% bigger and 300% stronger, but its weight is about 30% lighter.