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

A technology of reinforced composite materials and numerical simulation, applied in the field of mechanical processing, can solve the problems of low precision and efficiency, and achieve the effect of high precision and fast speed

Active Publication Date: 2020-08-25
江苏航浦国创复材研究院有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of premature failure of materials and low precision and efficiency in drilling simulation of CFRP, and to invent a multi-scale numerical simulation method for drilling of carbon fiber reinforced composite materials, which fully considers the difference between fiber and matrix , and the accuracy and efficiency of the simulation

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

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Embodiment Construction

[0028] Below in conjunction with example the present invention is further described.

[0029] A multi-scale numerical simulation method for drilling carbon fiber reinforced composite materials, which includes the following steps:

[0030] First, the meso-constitutive and macro-constitutive modeling of the matrix and fibers is carried out. Take T700 carbon fiber reinforced composite single-layer unidirectional (0°) plate as an example. Through experiments, its longitudinal tensile ultimate strength is 1830.7MPa, longitudinal ultimate compressive strength is 895.16MPa, transverse tensile limit is 31.31MPa, transverse compressive limit is 124.54MPa, longitudinal Young's modulus is 99.22GPa, and transverse Young's modulus is 7.05GPa. The material is divided into infinitely small stress units, and the tensile (compressive) ultimate stress in the X, Y, and Z directions and the ultimate shear stress in the XY, XZ, and YZ planes are calculated according to the classical material mech...

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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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/20G06F111/08G06F113/26G06F119/14
CPCG06F30/20
Inventor 齐振超李玖阳杨晓伟张若凡杨家伟尚一鸣
Owner 江苏航浦国创复材研究院有限公司
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