Molding method of pulse current curing carbon fiber composite material

Abstract

According to the forming method for curing the carbon fiber composite material through the pulse current, metal materials with good conductivity are arranged at the two ends, in the fiber length direction, of the carbon fiber composite material correspondingly to serve as electrodes, a pulse power source is connected with the electrodes through wires, and the pulse current with the controllable frequency and peak value is provided; joule heat is generated in the carbon fibers under the thermal effect of current, temperature control is performed by adjusting the magnitude of average current, and meanwhile, the skin depth of the skin effect is changed by adjusting the frequency of pulse current, so that the effective resistance of the carbon fibers is changed, and the temperature of the material is cooperatively controlled; and under the auxiliary condition that uniform pressure is applied to the carbon fiber composite material, curing molding of the carbon fiber composite material is carried out according to the curing temperature requirement of the composite material.

Description

technical field [0001] The application relates to the field of curing and molding of carbon fiber composite materials, and in particular to a molding method of pulse current curing carbon fiber composite materials. Background technique [0002] Compared with metal materials or other engineering materials, carbon fiber composites have higher specific strength, specific modulus, good fatigue resistance and corrosion resistance, and most carbon fiber composites can be designed by designing the orientation and amount of reinforcing fibers. The performance of structural materials is tailored to optimize performance. As an important part of aerospace high-tech products, carbon fiber composite materials can effectively reduce the structural mass of aircraft, increase payload and range, and reduce costs. Aircraft such as the Boeing 787 (Boeing) and Airbus A350 (Airbus) have replaced more than 50 percent of the fuselage with carbon fiber composites. As the excellent properties of c...

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Problems solved by technology

However, the high electrical conductivity of carbon fiber makes the current required when the material reaches the curing temperature too large. For example, the current required to heat a carbon fiber composite material with a length of 80 mm, a width of 50 mm, and a thickness of 1 mm to 130 ° C is about 50 A, and a large current is generated. A large amount of Joule heat will also produce current etching on the carbon fiber itself, which will seriously cause perforation of the carbon fiber, thereby affecting the overall mechanical properties of the carbon fiber composite component

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