Brittle material grinding process modeling simulation method

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...

AI Technical Summary

Problems solved by technology

However, just like other experimental methods, due to the limitations of processing and observation conditions, the single-grain grinding experiment can only observe part of the processing results, which cannot well show the behavior of materials at the micro-nano scale during processing.

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