Carbon fiber reinforced composite material unidirectional laminate two-dimensional cutting force modeling method

Abstract

The invention discloses a carbon fiber reinforced composite material unidirectional laminate two-dimensional cutting force modeling method.A cutting force model under any fiber direction angle can be obtained according to a directionality cutting ratio so that the two-dimensional cutting force model can predict two-dimensional cutting force under different fiber direction angles.The method comprises the following steps that fiber direction angles theta are 0 degree, 90 degrees and 135 degrees respectively for performing carbon fiber reinforced composite material unidirectional laminate two-dimensional cutting experiments to obtain basic data for modeling; according to the basic data obtained through the cutting experiments when the theta is 0 degree and 90 degrees, a two-dimensional cutting force model of the carbon fiber reinforced composite material unidirectional laminate under any direction angle along fiber is built; according to the basic data obtained by the cutting experiments when the theta is 0 degree and 135 degrees, a two-dimensional cutting force model of the carbon fiber reinforced composite material unidirectional laminate under any direction angle opposite to fiber is built.According to the carbon fiber reinforced composite material unidirectional laminate two-dimensional cutting force modeling method, influences of a cutting mechanism and anisotropism are considered, the prediction precision of the obtained two-dimensional cutting force model is higher, and the method can be used for designing and manufacturing a cutting tool for carbon fiber reinforced materials and determining cutting technological paths and parameters.

Description

technical field [0001] The present invention relates to the cutting process of carbon fiber reinforced composite material unidirectional laminated plate, and specifically relates to a modeling method of two-dimensional cutting force of carbon fiber reinforced composite material unidirectional laminated plate based on directional cutting specific energy, which belongs to mechanical cutting field of processing technology. Background technique [0002] The typical two-dimensional cutting force modeling of metal materials is mainly based on the assumption of shear slip. It is believed that there is a shear slip surface in the cutting process of metal materials, and the shear slip surface After the workpiece material reaches the shear stress limit, it slips along the shear angle and forms the final chip. The more classic calculation formulas for the shear angle during orthogonal cutting of metal materials include the M.E. Merchant model and the Lee and Shaffer model. Carbon Fib...

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Problems solved by technology

Although this kind of theoretical model explains the mechanical behavior of CFRP unidirectional laminates during cutting from the material removal mechanism to a certain extent, it is limited by the fact that the shear slip is obviously not suitable for the reverse fiber direction angle. There are restrictions on the direction of the fibers

In addition, in order to expand the applicability of the model in unidirectional long fiber reinforced materials, this kind of theoretical model is generally only based on the mechanical properties of CFRP materials, and does not introduce the data of basic cutting tests, so that the obtained cutting force model can be used to predict The accuracy is not satisfactory, resulting in the lack of quantitative guidance in guiding cutting process optimization and tool design

[0003] After searching the existing literature, no public reports have been found on the CFRP two-dimensional cutting cutting force modeling method based on the cutting specific energy under different fiber orientation angles.

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