Multi-scale multiphysics coupling simulation method of metal additive manufacturing

Abstract

The invention provides a multi-scale multiphysics coupling simulation method of metal additive manufacturing. The method comprises the following steps: S1, establishing a metal additive manufacturing technology data model; S2, carrying out first-principles calculation by calculation software on a microscale through first principles to acquire micro physical properties of additive metal material; S3, establishing an NxNxN super-cell model of the additive metal material, and carrying out molecular dynamics simulation calculation through molecular dynamics simulation software; S4, studying plasma, which is generated in a melting process of metal powder heated by an electron beam or a laser, on a mesoscale; S5, utilizing a flow-heat-solid-magnet multiphysics coupling simulation platform for simulation calculation; and S6, establishing a technology parameter feedback control model for different types and distribution situations of defects, and optimizing metal additive manufacturing technology parameters. The method forms a macro-micro-integration metal additive manufacturing product quality prediction system by means of multi-scale multiphysics coupling simulation.

Description

technical field [0001] The invention relates to the field of metal additive manufacturing, in particular to a multi-scale and multi-physical field coupling simulation method for metal additive manufacturing. Background technique [0002] Metal additive manufacturing technology is a manufacturing method that increases materials layer by layer to form three-dimensional complex structural parts. It is specifically divided into synchronous powder feeding (wire feeding) laser (electron beam, arc, etc.) cladding forming technology and laser (electron beam) There are two types of powder bed forming techniques for selective melting. Since 1995, the U.S. Defense Advanced Research Projects Agency and the Office of Naval Research have conducted a series of studies on the technology, with plans to engineer it within a few years. However, limited by key technical issues such as laser stability and control system technology level at that time, metal additive manufacturing technology has ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies of the existing metal additive manufacturing technology, and propose a method that can reveal the microstructure evolution law, the formation and development mechanism of metallurgical defects, residual stress and deformation, and precise shape control during the additive manufacturing process. The multi-scale multi-physics field coupling simulation method of the mechanism establishes a material-process-defect evolution-performance metal additive manufacturing accurate prediction model

Images