Grain Boundary Conformed Volumetric Mesh Generation from a Three-Dimensional Voxellated Polycrystalline Microstructure
| Autor: | Ju-Young Kim, Sihwa Sung, Gaeun Son, Heung Nam Han, Sang-Hyun Jung, Soo Gyeong Cho, Young-Ju Jeon, Sukbin Lee, Myeong-Jin Lee |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Metals and Alloys Geometry Context (language use) 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Curvature Microstructure 01 natural sciences Finite element method Grain growth Computer Science::Graphics Mechanics of Materials Mesh generation 0103 physical sciences Triangle mesh Materials Chemistry Grain boundary 0210 nano-technology ComputingMethodologies_COMPUTERGRAPHICS |
| Zdroj: | Metals and Materials International. 24:845-859 |
| ISSN: | 2005-4149 1598-9623 |
| Popis: | We present a new comprehensive scheme for generating grain boundary conformed, volumetric mesh elements from a three-dimensional voxellated polycrystalline microstructure. From the voxellated image of a polycrystalline microstructure obtained from the Monte Carlo Potts model in the context of isotropic normal grain growth simulation, its grain boundary network is approximated as a curvature-maintained conformal triangular surface mesh using a set of in-house codes. In order to improve the surface mesh quality and to adjust mesh resolution, various re-meshing techniques in a commercial software are applied to the approximated grain boundary mesh. It is found that the aspect ratio, the minimum angle and the Jacobian value of the re-meshed surface triangular mesh are successfully improved. Using such an enhanced surface mesh, conformal volumetric tetrahedral elements of the polycrystalline microstructure are created using a commercial software, again. The resultant mesh seamlessly retains the short- and long-range curvature of grain boundaries and junctions as well as the realistic morphology of the grains inside the polycrystal. It is noted that the proposed scheme is the first to successfully generate three-dimensional mesh elements for polycrystals with high enough quality to be used for the microstructure-based finite element analysis, while the realistic characteristics of grain boundaries and grains are maintained from the corresponding voxellated microstructure image. |
| Databáze: | OpenAIRE |
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