What are the advantages of the main applications of composite materials in those fields?

The following are all fiber reinforced composite materials, which I hope will help you.

Let's talk about the advantages first (taking fiber reinforced composites as an example)

The relative density of light weight and high strength is between 1.5~2.0, which is only 1/4~ 1/5 of carbon steel, but its tensile strength is close to or even higher than that of carbon steel, and its specific strength is comparable to that of high-grade alloy steel. Therefore, outstanding achievements have been made in aviation, rockets, spacecraft, high-pressure vessels and other products that need to reduce their own weight. The tensile, bending and compressive strength of some epoxy FRP can reach above 400Mpa.

Glass fiber reinforced plastic with good corrosion resistance is a good corrosion-resistant material, which has good tolerance to atmosphere, water, acid, alkali, salt and various oils and solvents with general concentration. It has been applied to all aspects of chemical corrosion protection and is replacing carbon steel, stainless steel, wood and non-ferrous metals.

Good electrical properties are excellent insulating materials used as insulators. And can still protect good dielectric property at high frequency. Microwave has good permeability and has been widely used in radome.

The thermal conductivity of FRP with good thermal performance is low, which is1.25 ~1.67 kj/(m h k) at room temperature, which is only1100 ~1/of metal. In the case of instantaneous ultra-high temperature, it is an ideal heat-resistant and ablation-resistant material, which can protect spacecraft from high-speed airflow above 2000℃.

Good designability (1). Products with various structures can be designed flexibly according to needs to meet the use requirements and make the products have good integrity.

(2) The selection of materials can fully meet the performance of the product, such as corrosion resistance, instantaneous high temperature resistance, particularly high strength in a certain direction of the product, good dielectric property, and so on.

Excellent manufacturability (1). The molding process can be flexibly selected according to the shape, technical requirements, use and quantity of the product.

(2) The process is simple, it can be molded at one time, and the economic effect is outstanding, especially for products with complex shapes and small quantity that are difficult to be molded, which highlights its technical advantages.

Application field:

Application field of FRP

1. Application of FRP in China's construction field

Before 1980s, FRP was mainly used in military products. Due to confidentiality restrictions, it was difficult for institutions to communicate with each other. Architects don't understand the excellent performance of FRP and can't get reliable performance data, so it has not been widely used in building structures.

Since 1990s, with the deepening of the research on FRP, the defects of FRP have been overcome and the product price has dropped. The application in large-scale building structures has achieved good results. Here are a few examples:

(1) Large FRP machine room: 199 1 built in Hangzhou. The computer room is in harmony with the hotel below, which is difficult to distinguish from the outside, and the effect is very good;

(2) The cylindrical roof of Karaoke Entertainment Hall: 26m long, with a span of 10m, built on the roof of 1992 Shanghai Greater China Rubber Factory, which is very beautiful and practical;

(3) The spherical roof of the revolving restaurant: the spherical diameter is 45m, which was built in Shanghai Changjiang Estuary Mall1993;

(4) The hyperboloid roof and interior decoration of the lobby of Oriental Pearl TV Tower: 60m in diameter, with a total area of about 5000m2, 1994 completed. It only took more than three months from the signing of the contract to the completion of the installation, and the effect has been good so far;

(5) The spire of the Ark Building (7m high) and the assembled roof (about 300 m2): 1996 completed,1March 997 installed.

There are many kinds of FRP used in foreign construction fields.

The amount of composite materials in the whole engineering materials will increase from 2% in 1950 to 14.7% in 2000, and it is expected to reach 18.4% in 2020. In the United States, the consumption of 1993 is 237,000 t, accounting for 20% of the total, which is the second largest application field after transportation. UK 1992 accounts for 26.6% of the total consumption, which is the largest application field; The consumption of 1992 in western Europe is 247,000 t, accounting for 2 1.3% of the total, and it is the second largest application field. The consumption of Japan 1993 is 237,000 t, accounting for about 55% of the total consumption, and it is the largest application field.

The application examples of FRP in foreign construction fields are as follows

① All-glass fiber reinforced plastic spherical casino, with a diameter of 66m: The building is located in Reno near San Francisco on the west coast of the United States, and is assembled by more than 2,000 quadrilateral glass fiber reinforced plastic units;

② Trump Taj Mahal Complex Casino in New Jersey and Atlantic City, USA: It covers an area of 390,000 m2, with a facade length of 1.6km, and most of them are glass fiber reinforced plastic art decorative pieces, with more than 23,000 pieces, with a total value of about150,000 USD;

③ The glass fiber reinforced plastic Coca-Cola billboard in new york, USA: stereoscopic l2.5m× 19.8m, "coca-cola bottle" height 12.8m, and ice cube height 3m;

④ FRP; Doors and windows, facades, railings, cornices and decorative arches used in many buildings in Boston, USA;

⑤ The high-rise building of Atlanta Bank Hall is made of glass fiber reinforced plastic, and the C & ampS bank Building in Tampa, Florida (the tallest building on the west coast of the state, with 43 floors) is made of semi-conical glass fiber reinforced plastic roof, which is 7.9m high and has multiple functions such as anticorrosion, wave permeability and wind resistance. FRP is also used in airports and weather radomes.

According to rough statistics, the application of FRP in the construction field mainly includes the following five aspects:

① Various special-shaped building structures: radome, sentry box, billboard (object), spherical casino, ball curtain theater, long-span hangar, garage, warehouse, revolving restaurant roof, karaoke entertainment hall column top, stadium long-span grandstand roof, indoor gymnasium roof, conical roof of high-rise building, etc. ② Various functional buildings: TV tower wave-transparent wall, wave-transparent machine room, shielding room, sound insulation wall, chemical plant anti-corrosion workshop, FRP and metal composite pier, hospital radiation composite wall, large cooling tower, anti-corrosion plate of sewage treatment plant, large anti-corrosion tank, storage tank, etc. (3) Interior and exterior decoration of various buildings: eaves, cornices, lintels, riding corridors, lamp troughs, lighting, Roman columns, ceilings, artistic vases, rockery waterfalls, auspicious animals (lions, cows, elephants, etc.). ), etc. ④ Building components of well-off houses and offices: doors, partitions, partitions, furniture, kitchen utensils, garden railings, fences, small garages, swimming pools, various window frames, bonsai, etc. ⑤ Various sanitary wares: integral sanitary box room, integral shower room, water tank, portable toilet, purification pool, washbasin, toilet, bathtub, solar water heater, etc.

2. Transportation sector: the growth rate centered on automobiles is 1.7%. Although the number of buses sold has decreased, glass fiber reinforced plastic (FRP) products have steadily increased. More than 400 kinds of parts used in automobile main body are SMC products. In 2007, more than 100 kinds of parts were used in new cars. The use of glass fiber reinforced thermoplastic (FRTP) is increasing rapidly. Fr- nylon intake pipe for automobile engine. It is more efficient and economical than aluminum automobile engine. The automobile transmission shaft is pultruded and made of carbon fiber, vinyl ester and aluminum tube. At present, it has been active in the automobile market. The most important thing is the air conditioning ventilation pipe formed by pultrusion. The Ministry of Railways has conducted field tests on all FRP vehicles and put them on the market this year.

Third, the field of civil architecture: FRP products are also increasing in the residential field. In terms of infrastructure, there are trunk highway bridges, pedestrian bridges and port terminals. In addition, FRP bars are also widely used to strengthen concrete.

Corrosion-resistant equipment: FRP is widely used in equipment. Semiconductor industry and chemical industry, sewage treatment and sewer treatment, oil and gas platforms, chemical storage tanks, etc.

Five: the boat.

6. Electrical and electronic: There is a great demand for printed circuit boards and radomes. The lamp poles produced by FW have a growing trend, and the field experiment of lamp poles has begun. It has been mass-produced in Europe. The United States also put it on the market. The elimination of electronic products also needs stimulation. It is expected that FRP and FRTP products will also be used in mobile phones in the future.

Seven: consumer materials: FRP is aging-resistant and beautiful in appearance, replacing the original materials. Sales of satellite broadcasting antennas and DBS antennas are increasing, especially DBS antennas. There are more and more golf clubs made of carbon fiber, and the manufacturers of carbon fiber have also increased their equipment.

Eight: Household appliances and office equipment: The sales of newly designed sewing machine shells are also increasing. At present, new houses are affected by resale, and home appliances are also growing. Office equipment has a large market, wide sales and strong foundation. FRTP glass fiber reinforced plastic grille has excellent corrosion resistance, heat resistance, rigidity and flame retardancy, so it is dominant in the use of household appliances and office equipment.

Nine: aviation and national defense.

Application examples of FRP profiles

Glass fiber reinforced plastic tool handle This series of products are mainly used for garden tools and hardware tools, including shovels, rakes, hoes, scissors, hammers, etc.

This series of FRP pultruded round tubes are suitable for making tents, mosquito nets, bags, handbags, X-frames, tool handles, windmills, golf balls (ball bags, flagpoles, practice poles, practice nets), tripods, spray poles, tripod poles, toy skeletons, flying saucer skeletons, diabolo handles, kite poles, etc.

This series of FRP pultruded round bars are suitable for making umbrella ribs, kite skeletons, PCB equipment, airplane models, support blankets, beach mats, rotating shafts, shaft cores, curtain rods, toys, bags, flying butterflies, flagpoles (table flags, car flags, waving flags, knife-shaped flags), plant support frames, fences, chimney poles, game blanket support frames and curtain rotation/shifting.

This series of products is suitable for making yoga fitness circle, magic circle, fitness equipment, toy bow, curtain belt, luggage, handbag, flagpole stick, tool handle and so on.

Glass fiber reinforced plastic grille platform series This series of products mainly includes glass fiber reinforced plastic grille, anti-corrosion platform, walkway and fence system, insulation ladder, cooling tower support frame, cable tray, subway track cover and so on.

We wrap PP PE PVC on the surface of glass fiber rod, glass fiber tube and glass fiber rod according to customer's demand. This product has been widely used in horticulture and agriculture.