Function gradient material hidden model building method based on distance field

Abstract

The invention provides a function gradient material hidden model building method based on a distance field. The method comprises the following concrete steps that (1) a geometric distance field is created: an entity prototype is measured, surface point cloud data is obtained, the point cloud data is a position coordinate value, a surrounding box is used for surrounding the position coordinate, the surrounding box is uniformly divided, and signed distance fields of the point cloud data of all dividing lattice top points in the surrounding box are calculated for displaying a geometric model of the entity; (2) a material distance field is created: the material features are determined according to the material design intention of the function gradient materials, so that the material distance field is calculated; (3) function gradient materials are subjected to hidden modeling. The functional gradient material geometric distance field and the material field modeling are creatively combined, and the hidden function mode of the distance field is used for completely expressing the geometric and material information. Through the self-adaptive characteristic of the distance field, the method is applicable to any complicated models, and the Boolean operation can be conveniently carried out.

Description

technical field [0001] The invention belongs to the technical field of functionally graded materials, in particular to an implicit modeling method for functionally graded materials based on a distance field. Background technique [0002] Functionally Graded Material (Functionally Graded Material, FGM) is a new type of functional material first proposed by Japanese scientist Masaoyuki Hirai in 1986 in order to solve the problem that the material can work normally in a special environment. FGM is a composite material in which two or more materials are fused microscopically to form a composite material in which the volume fraction of each component material changes continuously along a certain direction or multiple directions. During the fusion process, the properties of the FGM component materials themselves do not change, and the physical properties of the material are related to the volume fraction function of various component materials, and change continuously along the di...

AI Technical Summary

Problems solved by technology

[0008] (5) Feature modeling shows material composition and material change information. This method only uses points, straight lines and planes as features, and does not consider functionally gradient material modeling of arbitrary contour features.

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