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Proceedings of CAD'17, 2017, 132-137
Recognition and Decomposition of Rib Features in Thin-Shell Plastic Parts for Finite Element Analysis

Jiing-Yih Lai, Ming-Hsuan Wang, Pei-Pu Song, National Central University, Zhongli, Taiwan
Chia-Hsiang Hsu, Yao-Chen Tsai, CoreTech System (Moldex3D) Co., Ltd., Hsinchu, Taiwan

Abstract. Mold flow analysis is commonly used in injection molding to assist in designing injection molds as well as setting the process parameters. In mold flow analysis, it is necessary to convert the computer-aided design (CAD) model into solid meshes so that the solver can perform computations. Traditionally, tetrahedral meshes are used because they are easy to generate automatically, but this type of mesh is of the lowest quality compared with other types (e.g., pyramidal, prismatic, or hexahedral). Hexahedral meshes are highly preferable to tetrahedral meshes for their greater accuracy, convergence, and application specificity. However, hexahedral meshes are inherently trickier to generate because they require the careful decomposition of the CAD model. The generation of entirely hexahedral meshes on a CAD model may be difficult, but a hybrid combination of hexahedral and prismatic meshes is possible and can solve the problems of tetrahedral meshes.

Keywords. Rib Recognition, Feature Recognition, Rib Decomposition, Meshing, B-rep Model

DOI: 10.14733/cadconfP.2017.132-137