Automatic surface repairing, defeaturing and meshing algorithms based on an extended B-rep
•A new data structure that combines the continuous and discrete surface representations is proposed.•A sequence of repairing, defeaturing and meshing algorithms that can exploit the strengths of both representations is developed.•The repairing algorithm is defined on the discrete model but can outpu...
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| Published in: | Advances in engineering software (1992) Vol. 86; pp. 55 - 69 |
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01-08-2015
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| Abstract | •A new data structure that combines the continuous and discrete surface representations is proposed.•A sequence of repairing, defeaturing and meshing algorithms that can exploit the strengths of both representations is developed.•The repairing algorithm is defined on the discrete model but can output a correct B-rep.•The output mesh is loyal to the input continuous model and therefore more geometrically accurate.
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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| AbstractList | 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. •A new data structure that combines the continuous and discrete surface representations is proposed.•A sequence of repairing, defeaturing and meshing algorithms that can exploit the strengths of both representations is developed.•The repairing algorithm is defined on the discrete model but can output a correct B-rep.•The output mesh is loyal to the input continuous model and therefore more geometrically accurate. 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. |
| Author | Zheng, Yao Li, Chenfeng Chen, Jianjun Cao, Bingwan Xie, Lijun Xiao, Zhoufang |
| Author_xml | – sequence: 1 givenname: Jianjun surname: Chen fullname: Chen, Jianjun organization: Center for Engineering and Scientific Computation, and School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China – sequence: 2 givenname: Bingwan surname: Cao fullname: Cao, Bingwan organization: Center for Engineering and Scientific Computation, and School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China – sequence: 3 givenname: Yao surname: Zheng fullname: Zheng, Yao organization: Center for Engineering and Scientific Computation, and School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China – sequence: 4 givenname: Lijun surname: Xie fullname: Xie, Lijun email: zdxlj@zju.edu.cn organization: Center for Engineering and Scientific Computation, and School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China – sequence: 5 givenname: Chenfeng surname: Li fullname: Li, Chenfeng organization: Zienkiewicz Centre for Computational Engineering, and Energy Safety Research Institute, Swansea University, Swansea SA2 8PP, UK – sequence: 6 givenname: Zhoufang surname: Xiao fullname: Xiao, Zhoufang organization: Center for Engineering and Scientific Computation, and School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China |
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| Cites_doi | 10.1007/s00466-012-0736-4 10.1016/S0045-7949(02)00105-0 10.1016/j.compstruc.2010.11.016 10.1016/S0045-7825(97)00103-5 10.1016/j.cag.2013.10.031 10.1002/nme.2263 10.1016/j.cag.2010.06.007 10.1016/j.advengsoft.2010.07.003 10.1142/S0218195900000188 10.1002/fld.1166 10.1115/1.3593414 |
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| SubjectTerms | Algorithms Boundaries Boundary representation Defeaturing Face clustering Finite element method Maintenance Mathematical models Mesh generation Meshing Repairing Representations Virtual topology |
| Title | Automatic surface repairing, defeaturing and meshing algorithms based on an extended B-rep |
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