Brittle material grinding process modeling simulation method

A brittle material and grinding technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as not being well displayed, and achieve the effect of avoiding difficulty in online observation and saving labor costs

Inactive Publication Date: 2017-05-10
DALIAN UNIV OF TECH
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Problems solved by technology

However, just like other experimental methods, due to the limitations of processing and observation conditions, the single-grain grinding experi

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  • Brittle material grinding process modeling simulation method
  • Brittle material grinding process modeling simulation method
  • Brittle material grinding process modeling simulation method

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Embodiment Construction

[0036] The specific implementation examples of the present invention will be described in detail below in conjunction with the accompanying drawings and technical solutions.

[0037] attached figure 1 It is a flow chart of the implementation process of the present invention, taking quartz glass as an example to explain in detail the simulation method for the single particle grinding process of brittle materials based on the SPH algorithm. Specific steps are as follows:

[0038] Step 1: Set the size of the single abrasive grain and the material to be processed. The single abrasive material is diamond with a density of 3.51g / cm 3 , elastic modulus of 1141GPa, Poisson's ratio of 0.07, abrasive particles approximate to a sphere at the micro-nano scale, and grinding speed of 10m / s. The quartz glass workpiece is designed to be 8×5×8μm 3 cube.

[0039] Step 2: Establish a three-dimensional abrasive particle finite element model in ANSYS. Since the hardness of diamond is much hi...

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Abstract

The invention discloses a brittle material grinding process simulation method, belongs to the field of micro-nano ultraprecision machining numeric simulation, and relates to a three-dimensional micro-nano single grain grinding simulation method based on a smoothed particle hydrodynamics method. The method comprises the steps of firstly setting the sizes of a grinding grain and a machined material; secondly, building a three-dimensional single grinding grain finite element model in ANSYS, building an SPH model of a workpiece material in LS-PrePost, setting related model parameters, and performing calculation in LS-DYNA; and finally, analyzing a simulation result. According to the simulation method, data such as a stress, a strain, density and the like in the grinding process can be obtained more clearly and accurately; a brittle material is removed in a plastic region by controlling a processing depth, and a damage mechanism of the brittle material is analyzed, so that relatively ideal surface quality is obtained; and a large amount of labor costs, experimental costs and economic costs are reduced and the difficult problem of difficult online observation of an experimental method is avoided.

Description

technical field [0001] The invention belongs to the field of numerical simulation of micro-nano ultra-precision machining, and relates to a three-dimensional micro-nano grinding processing simulation method based on a smooth particle fluid dynamics method. Background technique [0002] With the development of science and technology, optical glass is more and more widely used in the fields of optoelectronic communication, aerospace and national defense industry. However, due to its high brittleness, high hardness, and low fracture toughness, it is difficult to obtain an ultra-smooth surface that can meet the growing requirements of optical technology. Traditional methods of machining brittle materials are prone to microcracks during loading and machining. These microcracks are more likely to lead to brittle fracture during subsequent processing, and it is difficult to obtain nano-scale optical surfaces, which seriously affects the application of brittle materials such as qua...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 郑桂林郭晓光李洋史宇同王晓丽陈冲李春晖康仁科金洙吉
Owner DALIAN UNIV OF TECH
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