Direct Modification of Semantically-Enriched Finite Element Meshes

Lou, Ruding; Giannini, Franca; Falcidieno, Bianca; Pernot, Jean-Philippe; Véron, Philippe; Mikchevitch, Alexei; Marc, Raphaël

doi:10.1142/s0218654310001298

Cited by 2 publications

(8 citation statements)

References 15 publications

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“…It is not only very suitable when the original CAD model is not available, as in the case of maintenance, but also for the preliminary design phases where many alternative solutions often have to be tested. The concept of the CAD-less framework has been proposed in Lou et al (2010b) and is improved in this paper to better highlight the "generic" character of the CAD-less operators. This framework consists in a general operator structure which relies on sub-operators treating various aspects of the three levels of information (geometry and topology of the mesh, FE mesh group and FE simulation semantics) characterising a FEA mesh model.…”

Section: Related Workmentioning

confidence: 99%

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Filleting sharp edges of multi-partitioned volume finite element meshes

Lou

Pernot

Giannini

et al. 2015

Engineering Computations

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International audiencePurpose – The purpose of this paper is to set up a new framework to enable direct modifications of volume meshes enriched with semantic information associated to multiple partitions. An instance of filleting operator is prototyped under this framework and presented in the paper.Design/methodology/approach – In this paper, a generic mesh modification operator has been designed and a new instance of this operator for filleting finite element (FE) sharp edges of tetrahedral multi-partitioned meshes is also pro-posed. The filleting operator works in two main steps. The outer skin of the tetrahedral mesh is first deformed to round user-specified sharp edges while satisfying constraints relative to the shape of the so-called Virtual Group Boundaries. Then, in the filleting area, the positions of the inner nodes are relaxed to improve the aspect ratio of the mesh elements.Findings – The classical mainstream methodology for product behaviour optimization involves the repetition of four steps: CAD modelling, meshing of CAD models, enrichment of models with FE simulation semantics and FEA. This paper highlights how this methodology could be simplified by two steps: simulation model modification and FEA. The authors set up a new framework to enable direct modifications of volume meshes enriched with semantic information associated to multiple and the corresponding fillet operator is devised.Research limitations/implications – The proposed framework shows only a paradigm of direct modifications of semantic enriched meshes. It could be further more improved by adding or changing the modules inside. The fillet operator does not take into account the exact radius imposed by user.With this proposed fillet operator the mesh element density may not be enough high to obtain wished smoothness.Originality/value – This paper fulfils an identified industry need to speed up the product behaviour analysis process by directly modifying the simulation semantic enriched meshes

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Section: Related Workmentioning

confidence: 99%

“…In Lou et al (2010a), we describe the implemented operator for merging two meshes, while Lou et al (2010b) presents the drilling and cracking operators for complex 2D and 3D FE meshes. In this paper, a new instance of the CAD-less operator is presented.…”

Section: Instances Of the Generic Operatormentioning

confidence: 99%

Filleting sharp edges of multi-partitioned volume finite element meshes

Lou

Pernot

Giannini

et al. 2015

Engineering Computations

Self Cite

View full text Add to dashboard Cite

show abstract

“…Currently, advanced industrial production systematically relies on the following cycle: computer-aided design (CAD), meshing/data preparation for simulation, finite element analysis and optimization. When the product needs only partial optimization or small modifications, returning to the CAD modeling stage is not a good choice (Lou et al , 2010b, 2010a; Onodera et al , 2011; Zhu et al , 2012; Graysmith and Shaw, 1997). Especially for large companies, wherein product designers and simulators often come from different departments.…”

Section: Introductionmentioning

confidence: 99%

“…In this way, the partition surface can be guaranteed; however, there is a possibility of generating degenerate elements. Lou et al (2010a) proposed a method similar to the method proposed by Nienhuys and Stappen (2001). However, to avoid generating degenerate elements, the possible degenerate elements are split or deleted before the nodes are moved.…”

Section: Introductionmentioning

confidence: 99%

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Direct modifications of tetrahedral meshes

Guo

Hai

Liu

2020

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Purpose During the industrial design process, a product is usually modified and analyzed repeatedly until reaching the final design. Modifying the model and regenerating a mesh for every update during this process is very time consuming. To improve efficiency, it is necessary to circumvent the computer-aided design modeling stage when possible and directly modify the meshes to save valuable time. The purpose of this paper is to develop a method for mesh modifications. Design/methodology/approach In contrast to existing studies, which focus on one or a class of modifications, this paper comprehensively studies mesh union, mesh gluing, mesh cutting and mesh partitioning. To improve the efficiency of the method, the paper presents a fast and effective surface mesh remeshing algorithm based on a ball-packing method and controls the remeshing regions with a size field. Findings Examples and results show that the proposed mesh modification method is efficient and effective. The proposed method can be also applied to meshes with different material properties, which is very different with previous work that is only suitable for the meshes with same material property. Originality/value This paper proposes an efficient and comprehensive tetrahedral mesh modification method, through which engineers can directly modify meshes instead of models and save time.

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Direct Modification of Semantically-Enriched Finite Element Meshes

Cited by 2 publications

References 15 publications

Filleting sharp edges of multi-partitioned volume finite element meshes

Filleting sharp edges of multi-partitioned volume finite element meshes

Direct modifications of tetrahedral meshes

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