Automatic surface repairing,defeaturing and meshing algorithms based on an extended B-rep |
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Affiliation: | 1. State Key Lab. of CAD&CG, Zhejiang University, Hangzhou 310027, PR China;2. School of Mechanical Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China |
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Abstract: | This paper presents an extended surface boundary representation (B-rep), where each topology entity can have dual geometric representations to accommodate various defects (e.g., gaps and overlaps) commonly present in CAD models. Keeping a uniform B-rep and the unsuppressed geometry data enables the use of various existing repairing, defeaturing and meshing algorithms to process CAD models with small gaps and overlaps on surface boundaries. The continuous geometry of the input model remains untouched in the repairing, defeaturing and meshing process, and the output mesh is loyal to this geometry. Such feature is often desirable in numerical simulations that require meshes with high geometry fidelity. |
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Keywords: | Mesh generation Repairing Defeaturing Boundary representation Virtual topology Face clustering |
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