Multiscale Numerical Simulation Method for Drilling of Carbon Fiber Reinforced Composite Materials

Abstract

The invention provides a multi-dimension numerical value simulation method oriendted to carbon fiber reinforcing composite material drilling. The method is characterized in that firstly substrate, fiber micro-mechanical constitutive and macro-mechanical constitutive modeling are conducted; secondly, macroscopic damage judgment is conducted, and information of a damage point is output; thirdly, a Python file is called to conduct micro-mechanical modeling analysis on the damage point; fourthly, data of micro-mechanical modeling analysis is utilized to calculate the effective rigidity of the point, and a macro-mechanical model is returned; fifthly, multi-dimension numerical value simulation system development and model evaluation are conducted. According to the multi-dimension numerical value simulation method oriented to carbon fiber reinforcing composite material drilling, full consideration is given to the difference between fiber and the substrate and the precision and efficiency of simulation. A carbon fiber reinforcing composite material drilling multi-dimension numerical value simulation method is provided.

Description

technical field

[0001] The invention relates to a mechanical processing technology, in particular to a drilling simulation method, specifically a multi-scale numerical simulation method for carbon fiber reinforced composite material drilling. Background technique

[0002] CFRP in aerospace products usually needs to be mechanically connected with other structures (composite materials, aluminum alloys, titanium alloys, etc.) by riveting, screwing, etc., which requires a large number of drilling holes for CFRP components during the assembly process of aerospace products processing operations. Since CFRP is a multiphase structure composed of fibers and matrix, it has the characteristics of heterogeneity, anisotropy, and high hardness. It is difficult to cut and process. During the drilling process, splitting at the entrance, tearing at the exit, and Damage such as burrs, interlayer separation, radial crushing, and microcracks. Thereby reducing the quality of the mechanical con...

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