Typical technological operations in repairing dents on the PCM honeycomb structures

Abstract

Products made of composite materials are widely used in all areas of mechanical engineering. As a rule, such materials are applied in aviation in manufacturing the airframe components. Damage to the composite components (dents) is possible during manufacturing process, storage and operation. The known techniques to repair dents on components made of the composite materials have significant drawbacks, such as decrease in strength and aerodynamic characteristics of the components at the repair point, increase in its mass, etc. Proposals were developed to improve the known repair methods. The updated repair technique was considered using the example of the honeycomb skin structures made of the epoxy matrix and a filler of carbon or glass fabric and honeycomb core of the polymer paper. The described technologies for the honeycomb structures repair would make it possible to restore the original strength, aerodynamic and other important characteristics of the repaired component or the assembly unit. Having the necessary equipment and using the described technological processes, it becomes possible to repair a structure without removing it from the aircraft, which would reduce costs and the repair cycle.