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논문 기본 정보

자료유형
학술저널
저자정보
Myeong-Jin Lee (Ulsan National Institute of Science and Technology (UNIST)) Young-Ju Jeon (Ulsan National Institute of Science and Technology (UNIST)) Ga-Eun Son (Ulsan National Institute of Science and Technology (UNIST)) Sihwa Sung (Ulsan National Institute of Science and Technology (UNIST)) Ju-Young Kim (Ulsan National Institute of Science and Technology (UNIST)) Heung Nam Han (Seoul National University) Soo Gyeong Cho (Agency for Defense Development (ADD)) Sang-Hyun Jung (Agency for Defense Development (ADD)) Sukbin Lee (Ulsan National Institute of Science and Technology (UNIST))
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.24 No.4
발행연도
2018.1
수록면
845 - 859 (15page)

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We present a new comprehensive scheme for generating grain boundary conformed, volumetric mesh elements from athree-dimensional voxellated polycrystalline microstructure. From the voxellated image of a polycrystalline microstructureobtained from the Monte Carlo Potts model in the context of isotropic normal grain growth simulation, its grain boundarynetwork is approximated as a curvature-maintained conformal triangular surface mesh using a set of in-house codes. In orderto improve the surface mesh quality and to adjust mesh resolution, various re-meshing techniques in a commercial softwareare applied to the approximated grain boundary mesh. It is found that the aspect ratio, the minimum angle and the Jacobianvalue of the re-meshed surface triangular mesh are successfully improved. Using such an enhanced surface mesh, conformalvolumetric tetrahedral elements of the polycrystalline microstructure are created using a commercial software, again. Theresultant mesh seamlessly retains the short- and long-range curvature of grain boundaries and junctions as well as the realisticmorphology of the grains inside the polycrystal. It is noted that the proposed scheme is the fi rst to successfully generatethree-dimensional mesh elements for polycrystals with high enough quality to be used for the microstructure-based fi niteelement analysis, while the realistic characteristics of grain boundaries and grains are maintained from the correspondingvoxellated microstructure image.

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