CN-121997396-A - Multi-material product modeling method and system for multi-material additive manufacturing

CN121997396ACN 121997396 ACN121997396 ACN 121997396ACN-121997396-A

Abstract

The application provides a multi-material product modeling method for multi-material additive manufacturing, which comprises the steps of defining three-dimensional or two-dimensional material elements based on target limiting conditions of a target object, constructing multi-material particles, expressing a material distribution function of the target object by using a field function, and carrying out optimization operation on an overlapping area of multiple materials in the target object so as to generate a multi-material product model corresponding to the target object. According to the application, the optimization operation of the overlapping area among the multi-material units is analyzed from three layers of geometry, materials, characteristics and the like, so that the material parameters of the multi-material are effectively expressed, and the multi-material product model is accurately constructed.

Inventors

LIU YUAN
HAO PAN
TIAN DONGBO
XU YILIU
HE YUN
FENG LEI
ZHANG CHUNLIU
CHEN CHANGYU
MENG SHAOHUA
NIU CHI

Assignees

北京卫星环境工程研究所

Dates

Publication Date: 20260508
Application Date: 20251224

Claims (10)

1. A multi-material product modeling method for multi-material additive manufacturing, comprising: defining a material element of a three-dimensional shape or a two-dimensional shape based on a target definition condition of a target object, and constructing a multi-material dot, wherein the target object comprises a first material and a second material which is different from the first material; expressing a material distribution function of the target object by using the field function; and carrying out optimization operation on the overlapping area of the multiple materials in the target object to generate a multiple material product model corresponding to the target object.
2. The multi-material product modeling method for multi-material additive manufacturing of claim 1, comprising: The distribution function of the first material is a linear function, so that the component proportion of the first component material changes linearly along a specific direction, wherein the specific direction comprises the length direction of the target object and the width direction of the target object.
3. The multi-material product modeling method for multi-material additive manufacturing of claim 1, comprising: The distribution function of the first material is a nonlinear function that utilizes one or more parameters for controlling the shape of the function curve to smooth the nonlinear material gradient distribution.
4. A multi-material product modeling method for multi-material additive manufacturing according to claim 3, comprising: When the first material in the target object is a gradient material consisting of metal and nonmetal, the distribution function of the first material is an exponential function, and the nonlinear material gradient distribution is smoothed by using an index for controlling the intensity of gradient change, and the target object comprises an embedded material.
5. The multi-material product modeling method for multi-material additive manufacturing of claim 4, comprising: And (3) for the material distribution array of the overlapped area, obtaining by weighted average calculation: M’ overlap ＝β'·m FGM +(1-β')·m Cu Wherein M ' overlap represents the final material composition of the overlapping region after the metal-ceramic gradient material overlaps with the pure copper, M FGM represents the metal-ceramic gradient material, M Cu represents the pure copper, and β' represents the weight coefficient of the metal-ceramic gradient material, which has a value ranging from [0,1].
6. The multi-material product modeling method for multi-material additive manufacturing of claim 1, comprising: and characterizing the material elements by adopting a material distribution array, wherein the material distribution array comprises material types and the duty ratio of each material at the space point.
7. The multi-material product modeling method for multi-material additive manufacturing of claim 1, comprising: the first material comprises a single material or a combined material; the second material comprises a single material or a combination of materials, and may be used as the embedding material.
8. The multi-material product modeling method for multi-material additive manufacturing of claim 1, comprising: The target defining condition of the target object comprises a continuous gradient transition region of a first material at a first end to a second material at a second end, the first material and the second material being different materials; the target object includes a cubic component having a heterogeneous metal gradient material, a heat dissipating component having a planar layered structure.
9. A multi-material product modeling system for multi-material additive manufacturing, comprising: A definition construction module for defining a three-dimensional shape or a two-dimensional shape of a material element based on a target definition condition of a target object, and constructing a multi-material dot, wherein the target object comprises a first material and a second material different from the first material; the expression module is used for expressing a material distribution function of the target object by using the field function; And the generating module is used for carrying out optimization operation on the overlapping area of the multiple materials in the target object so as to generate a multiple material product model corresponding to the target object.
10. The multi-material product modeling system for multi-material additive manufacturing of claim 9, comprising: The distribution function of the first material is a linear function, so that the component proportion of the first component material changes linearly along a specific direction, wherein the specific direction comprises the length direction of the target object and the width direction of the target object.

Description

Multi-material product modeling method and system for multi-material additive manufacturing Technical Field The application relates to the technical field of modeling of material products, in particular to a multi-material product modeling method and system for multi-material additive manufacturing. Background Additive manufacturing technology has been gradually popularized and applied to the manufacture of a series of light-weight structures such as wire frames, face shells, multiple holes and inner cavities which are difficult to process or cannot process at all in the past, and the performances of the structures and products adopting the structures are obviously improved. However, the parts manufactured by additive materials still have the main characteristics of single materials and uniform materials distributed inside. Along with the increasing requirements of modern manufacturing industry on the performance of products, heterogeneous material parts combining multiple materials can have excellent mechanical, electric, thermal, acoustic, optical and other performances which are not possessed by single material parts, and the heterogeneous material parts have great development prospect and wide application space. Aiming at the design research of multi-material or heterogeneous products, a rapid and effective heterogeneous interface modeling method is provided in the prior art, possible contact surface orientations are respectively selected by means of material simulation software, then the lattice matching degree of two materials is calculated, and the lattice matching is completed by adjusting the lattice constant of the contact surfaces, but the method does not involve material component matching. In addition, the prior art also has the problems that research on material fusion between research layers is lacking, accurate regulation and control of material components cannot be realized, gradient change of 1-dimensional material components can be realized, product design with more complex material distribution cannot be realized, and a geometric model, a material model and an isogeometric analysis model in an isogeometric analysis method cannot be subjected to unified digital expression. The Functional Gradient Material (FGM) is a novel heterogeneous composite material, and the internal material components and the microstructure of the material are in continuous gradient change in space, so that the macroscopic properties (such as mechanical, thermal and electrical properties) of the material also show corresponding gradient change. The design can effectively relieve huge interface stress generated by unmatched thermal expansion coefficients when dissimilar materials (such as metal and ceramic) are connected, avoid interface layering and cracking, and has wide application prospects in the fields of aerospace, biomedical treatment, energy sources and the like. However, existing material design methods often have difficulty defining and controlling complex material gradients accurately and flexibly. For example, direct geometric splicing of two or more materials can produce abrupt changes in performance at the interface, failing to achieve the gradient transition effect. While some advanced modeling methods can realize gradients, when processing complex geometries, embedding heterogeneous functional structures (such as embedding heat dissipation channels in thermal barrier coatings) or fusing multiple different gradient fields, the process is complex, the calculation amount is large, smooth transition between different material areas is difficult to ensure, and abrupt performance changes are easy to cause. Therefore, it is necessary to provide a multi-material product modeling method and system for multi-material additive manufacturing to solve one of the above-mentioned problems. Disclosure of Invention The application aims to provide a multi-material product modeling method and system for multi-material additive manufacturing, which can solve at least one technical problem. The specific scheme is as follows: According to the specific embodiment of the application, the multi-material product modeling method for multi-material additive manufacturing comprises the steps of defining three-dimensional or two-dimensional material elements based on target limiting conditions of a target object, constructing multi-material particles, expressing a material distribution function of the target object by using a field function, and carrying out optimization operation on overlapping areas of multiple materials in the target object to generate a multi-material product model corresponding to the target object. The application further provides a multi-material product modeling system oriented to multi-material additive manufacturing, which comprises a definition construction module, a generation module and a generation module, wherein the definition construction module is used for defining three-dimensional shape or tw