Representation method of drilling damage to carbon fiber composite

Abstract

The invention belongs to the field of damage evaluation, and relates to a representation method of drilling damage to a carbon fiber composite, in particular to a comprehensive representation method of drilling damage to a carbon fiber composite. According to the representation method, delamination damage, burr damage and tear damage generated in the actual machining process of the composite are considered, a damage representation factor formula is derived through weight coefficients of influences of the three kinds of damage on workpiece performance, and after the weight coefficients of the three kinds of damage are determined, a comprehensive representation factor of the machining damage is obtained by establishing a regression model between the three damage factors of delamination, burrs and tear and workpiece mechanical performance parameters. Calculation is simple, results are accurate, the comprehensive damage evaluation factor obtained through calculation is more convincing, and therefore the method has good engineering application prospects.

Description

technical field [0001] The invention belongs to the field of damage evaluation and relates to a comprehensive characterization method for drilling damage of carbon fiber composite materials. Background technique [0002] Carbon fiber composite materials have many advantages such as light weight, high strength, corrosion resistance, etc., can greatly improve payload and fuel consumption, and have been widely used in aerospace, automobiles, ships and other fields. However, since the components of carbon fiber composite materials cannot be connected by welding, mechanical connection using bolts has become the only option for the assembly process of carbon fiber composite materials. In order to meet the dimensional accuracy requirements of connection assembly, cutting of carbon fiber composite parts is one of the indispensable links in the manufacturing process of carbon fiber composite materials. Drilling is the most important cutting processing form of carbon fiber composite ...

AI Technical Summary

Problems solved by technology

In 1997, in the article "Some experimental investigations indrilling of carbon fiber-reinforced plastic (CFRP) composite laminates" published in "International Journal of Machine Tools and Manufacture" No. 37, pages 1097 to 1108, Chen of Taiwan Dahua Business School proposed a layering factor of the ratio diameter method to characterize drilling damage; in 2009, Dortmund, Germany In the article "Cutting edge rounding: An innovative tool wear criterion in drilling CFRP composite laminates" published by Ali Faraz of the University of Technology in "International Journal of Machine Tools and Manufacture" 49th issue 1185 to 1196, he proposed that the layered factor of the specific area method is used to characterize the drilling damage. However, various damages are often accompanied by the actual processing.

The above methods only characterize the drilling damage from a single aspect, and do not comprehensively consider the burr, tear and delamination damage caused by drilling, as well as the influence of the burr generation area, resulting in the inability to accurately characterize the degree of processing damage

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