Device and method for repairing layering damage of carbon fiber reinforced thermosetting resin-based composite material

Abstract

The invention discloses a device and method for repairing layering damage of a carbon fiber reinforced thermosetting resin-based composite material. The repairing device comprises an electrode, a pressure head assembly and an external power source, wherein the pressure head assembly clamps to-be-repaired carbon fiber reinforced thermosetting resin matrix composite components up and down in the pressure head assembly, the pressure head assembly can adjust the pressure according to different working conditions under the synergistic effect of a built-in power source and a pressure sensor, and the external power supply can adjust current parameters according to carbon fiber reinforced thermosetting resin matrix composite components with different sizes and material components under the synergistic effect of the built-in power supply and a transformer. According to the device and method, the layering damage of the repaired composite material components is not expanded, the performance can be recovered to 80%-90% of that before the damage, the actual maintenance requirement is met, the repairing period is greatly shortened, component replacement type maintenance is changed into repairing type maintenance, and the maintenance cost is greatly saved.

Description

technical field [0001] The invention relates to the field of repairing composite materials, in particular to a device for repairing layered damage of carbon fiber-reinforced thermosetting resin-based composite materials and a repairing method thereof. Background technique [0002] Carbon fiber reinforced composite materials have the characteristics of light weight, high strength, high temperature resistance, good durability and excellent electrical conductivity, and are widely used in aerospace, civil engineering and other fields. With the maturity of the preparation process and the continuous improvement of material properties, the application of composite materials has gradually shifted from decorative and secondary load-bearing components to primary load-bearing components. However, the composite material structure will inevitably be subjected to low-speed impact and other dynamic loads during service, which will cause damage such as delamination between layers, resulting...

AI Technical Summary

Problems solved by technology

The disadvantage of the dig-and-fill method is that the interlayer performance of the composite laminate is damaged, and for thermosetting resin-based composite materials, it is difficult to peel off a single damaged layer or the matrix material is easy to stick after peeling, resulting in complex processes and demanding conditions; The disadvantage of the subsidy method is that it seriously affects the appearance size of the component, and it cannot be applied to the appearance covering parts and components with strict requirements on the appearance size; the disadvantage of the mechanical connection repair method is that the continuity of the fiber is destroyed and the bolt connection is prone to electrochemical corrosion. and stress corrosion causing further damage

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