FRP is our common high-performance composite material, but carbon fiber resin composite material exceeds FRP in many properties, and its strength and elastic modulus mainly depend on the properties of raw fiber. Compared with glass fiber, carbon fiber has a high elastic modulus, which is 4-6 times that of glass fiber, and its tensile strength is slightly higher than it. For example, the strength and elastic modulus of carbon fiber-epoxy resin composites are higher than aluminum alloys, and even close to high-strength steel, which makes up for the disadvantage of low elastic modulus of FRP. At the same time, the relative density is smaller than that of FRP, so it has become one of the composite materials with the highest specific strength and specific modulus. Below, my editor from China Be-cu Prototype Material Technology Co., Ltd. will explain it in detail.
Due to the highest elastic modulus of carbon fiber, its composite parts
can be allowed to work under the state of ultimate stress, which overcomes the disadvantage that glass fiber resin composites are only allowed to be thrown under the condition of 60% lower than the ultimate stress. The mechanical properties of carbon fiber resin composites It also improved with increasing fiber content. The composite material contains 60%-70% of fiber is the best. At higher fiber content, the integrity of the composite is destroyed and performance is reduced.
Carbon fiber composite materials have excellent fatigue resistance. This is because the interface between the carbon fiber and the matrix in the composite material can hinder the expansion of the crack, and the imperfect combination of the fiber and the matrix is conducive to the blunting of the front part of the propagating crack, so that the expansion of the crack in the direction of the load stops. On the one hand, the composite The soft base of the material also has a hysteresis and hindering effect, so that the brittle fracture will not continue to expand. Carbon fiber composite components, if subjected to a force of about four tons per square centimeter, can withstand cycles of up to 20 to 30 million times without fatigue damage.
Carbon fiber composite materials have good impact resistance. Someone shot a piece of carbon fiber composite material less than a centimeter thick with a gun from ten paces away, but couldn’t penetrate it. Interestingly, when other fibers are mixed with carbon fibers as composite reinforcements, the impact properties of such hybrid fiber composites can be made 2-3 higher than those of carbon fiber composites. times.
In addition, the strength loss of carbon fiber composites in the high temperature aging test is also smaller than that of FRP, in terms of self-lubricating properties. Corrosion resistance and heat resistance have significant advantages. The anisotropy of mechanical properties of broken fiber composites exceeds that of boron fiber composites, especially glass fiber reinforced plastics. When the composites are filled with fibers in the form of spatial multi-dimensional weaving, this phenomenon is smaller than that when filled with reinforced filaments. In one case, cross-laying fibers can also reduce this phenomenon. If you need carbon fiber materials, you can contact the online customer service on the right. China Be-cu Prototype Material Technology Co., Ltd. specializes in the production of carbon fiber rods, tubes, cloth, plates, aramid cloth, glass fiber mesh cloth and other products. 7 years of production history, worthy of your trust!