Metal material J-C constitutive equation acquisition method based on orthogonal milling experiment

A technology of metal materials and constitutive equations, applied in the direction of measuring force components, force sensors related to bearings, instruments, etc., can solve the problems that the rheological behavior of metal materials with large strain cannot be applied, time-consuming and labor-intensive, etc., and achieve J-C constitutive The equation is accurate, the mechanical model is stable and simple, and the effect is easy to obtain

Active Publication Date: 2018-03-23
BEIHANG UNIV
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Problems solved by technology

However, it is time-consuming and labor-intensive to carry out such a large number of material mechanics experiments, and the obtained J-C constitutive equation of metal materials at low strain rate and temperature cannot be applied to the flow of metal materials at large strain, high strain rate and high temperature. variable behavior research

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  • Metal material J-C constitutive equation acquisition method based on orthogonal milling experiment
  • Metal material J-C constitutive equation acquisition method based on orthogonal milling experiment
  • Metal material J-C constitutive equation acquisition method based on orthogonal milling experiment

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Embodiment Construction

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] Under different cutting parameters, by changing the cutting speed V and the feed rate t 1 (i.e. undeformed chip thickness), measuring the three-way cutting force F during the experiment x , F y , F z and chip thickness after cutting t 2 to get the feed force F f , back force F t and the shear angle φ c , and then use the mechanics theory in orthogonal cutt...

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Abstract

The invention provides a metal material J-C constitutive equation acquisition method based on an orthogonal milling experiment. Side edge orthogonal milling or bottom edge orthogonal milling is carried out on a workpiece made of a to-be-tested metal material, and the feeding force Ff, the back force Ft and the shear angle phi c which correspond to multiple different milling parameters at a presetmoment in the machining process are obtained; on the basis of the feeding force Ff, the back force Ft and the shear angle phi c which correspond to the different milling parameters, a J-C constitutiveequation of the to-be-tested metal material is obtained. By constructing the special orthogonal milling experiment, a mechanical model in the cutting process is stable and simple, the feeding force Ff, the back force Ft and the shear angle phi c can be obtained more easily, and then the J-C constitutive equation of the to-be-tested metal material can be obtained more easily.

Description

technical field [0001] Embodiments of the present invention relate to the technical fields of cutting processing and material performance testing, and more specifically, relate to a method for obtaining J-C constitutive equations of metal materials based on orthogonal milling experiments. Background technique [0002] The J-C constitutive equation of materials is a physical equation describing the rheological behavior of materials under large deformation, high strain rate, and high temperature conditions. The J-C constitutive equation is especially suitable for metal materials under large deformation, high strain rate, and high temperature conditions. change behavior. The J-C constitutive equation has a simple form, few parameters, and is widely used in engineering. Its expression is as follows: [0003] [0004] Among them, σ flow is Mises flow stress, ε eff is the effective plastic strain, is the dimensionless equivalent plastic strain rate, T * is the same temper...

Claims

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Application Information

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IPC IPC(8): G06F17/50G01L5/00G01L5/16
CPCG01L5/008G01L5/16G06F30/20
Inventor 孙剑飞黄顺陈五一
Owner BEIHANG UNIV
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