Relevant bibliographies by topics / All-Hexahedral Mesh Generation

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'All-Hexahedral Mesh Generation'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "All-Hexahedral Mesh Generation"

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Gheni, Mamtimin, X. F. Wang, and Masanori Kikuchi. "Study on Self-Consistent Mesh Generating Method of Hexahedron Element Based on the Local Waveform Method with Damping." Key Engineering Materials 306-308 (March 2006): 607–12. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.607.

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Three-dimensional finite element method (FEM) is widely used as an effective numerical simulation technique to solve the complex engineering problem. In the FEM simulation technique at first it needs to discrete the problem. However, the almost all of the engineering problem have very complicated structure and shape, so that the mesh generation also have much difficulty. Furthermore, the correct generation of mesh is one of the most significant issues that directly affect to the accuracy of the FEM simulation. Though in extensive commercial software have an excellent automatic mesh generating system, however the problem of hexahedral automatic mesh generation and its adaptation are not enough to solve for practical applications, because for the mesh generation of complex shape is very difficult and still intensive labor work by hand. In this paper we present a new method to generate an appropriate mesh using existing regular hexahedral mesh and hexahedron mesh generation technique. This technique based on the wave transmits theory with damp named Waveform Mesh Generating (WMG) method. The results shown that the complex shaped FEM discrete hexahedral mesh model generated when shape of the side apply to regular mesh side as a waveform constraint.
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Islam, Md Shahidul, and Gazi Md Khalil. "MODIFICATION OF SURFACE MESH FOR THE GENERATION OF KNIFE ELEMENT FREE HEXAHEDRAL MESH." Journal of Mechanical Engineering 41, no. 2 (2011): 103–13. http://dx.doi.org/10.3329/jme.v41i2.7505.

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Hexahedral elements provide greater accuracy and efficiency over tetrahedral elements for finite element analysis of solids and for this reason the all-hexahedral element auto meshing has a growing demand. The whisker-weaving based plastering algorithm developed by the authors can generate hexahedral mesh (HM) automatically. In this method the prerequisite for generating HM is quadrilateral surface mesh (SM). From the given SM, combinatorial dual cycles or whisker sheet loops for whisker weaving algorithm are generated to produce HM. Generation of good quality HM does not depend only on the quality of quadrilaterals of the SM but also on the quality of the dual cycles generated from it. If the dual cycles have self-intersection, it could cause the formation of degenerated hexahedron called knife element, which is not usable in finite element analysis. In this paper a detailed method is proposed to modify the SM to remove self-intersections from its dual loops. The SM modification procedure of this proposed method has three basic steps. These steps are (a) face collapsing, (b) new face generation and (c) template application. A fully automatic computer program is developed on the basis of this proposed method and a number of models are analyzed to show the effectiveness of the proposal.DOI: http://dx.doi.org/10.3329/jme.v41i2.7505
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Wada, Yoshitaka, Jun'ichi Shinbori, and Masanori Kikuchi. "Adaptive FEM Analysis Technique Using Multigrid Method for Unstructured Hexahedral Meshes." Key Engineering Materials 306-308 (March 2006): 565–70. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.565.

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MG (multigrid) method is one of the most promising solvers for large scale problems. Hexahedral mesh generation and its adaptation are not enough to use for practical applications, because its mesh generation is very difficult and still labor intensive work by hand. We have developed hexahedral local refinement technique controlled by posterior error estimation. We have proposed a MG technique for unstructured hexahedral meshes with local mesh refinement. In this paper, the proposed technique is evaluated to check its performance and severe analyses of bending cantilevers. Performance of MG for unstructured hexahedral meshes is compared with that of the PCG (preconditioned conjugate gradient) through several benchmark examples of 3-D static elastic analysis. Proposed MG is faster than PCG for all problems as number of freedoms increases. Finally limitation of the proposed technique is presented.
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Li, Hua, and Gengdong Cheng. "New method for graded mesh generation of all hexahedral finite elements." Computers & Structures 76, no. 6 (2000): 729–40. http://dx.doi.org/10.1016/s0045-7949(99)00193-5.

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Calvo, Nestor A., and Sergio R. Idelsohn. "All-hexahedral element meshing: Generation of the dual mesh by recurrent subdivision." Computer Methods in Applied Mechanics and Engineering 182, no. 3-4 (2000): 371–78. http://dx.doi.org/10.1016/s0045-7825(99)00199-1.

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Hu, Kangkang, and Yongjie Jessica Zhang. "Centroidal Voronoi tessellation based polycube construction for adaptive all-hexahedral mesh generation." Computer Methods in Applied Mechanics and Engineering 305 (June 2016): 405–21. http://dx.doi.org/10.1016/j.cma.2016.03.021.

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Li, Mengfei, and Ruofeng Tong. "All-hexahedral mesh generation via inside-out advancing front based on harmonic fields." Visual Computer 28, no. 6-8 (2012): 839–47. http://dx.doi.org/10.1007/s00371-012-0707-y.

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Qian, Jin, and Yongjie Zhang. "Automatic unstructured all-hexahedral mesh generation from B-Reps for non-manifold CAD assemblies." Engineering with Computers 28, no. 4 (2011): 345–59. http://dx.doi.org/10.1007/s00366-011-0232-z.

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Zhang, Yongjie, Xinghua Liang, and Guoliang Xu. "A robust 2-refinement algorithm in octree or rhombic dodecahedral tree based all-hexahedral mesh generation." Computer Methods in Applied Mechanics and Engineering 256 (April 2013): 88–100. http://dx.doi.org/10.1016/j.cma.2012.12.020.

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Lu, Jean Hsiang-Chun, William Roshan Quadros, and Kenji Shimada. "Evaluation of user-guided semi-automatic decomposition tool for hexahedral mesh generation." Journal of Computational Design and Engineering 4, no. 4 (2017): 330–38. http://dx.doi.org/10.1016/j.jcde.2017.05.001.

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Abstract Volumetric decomposition is essential for all-hexahedral mesh generation. Because fully automatic decomposition methods that can generate high-quality hexahedral meshes for arbitrary volumes have yet to be realized, manual decomposition is still required frequently. Manual decomposition is a laborious process and requires a high level of user expertise. Therefore, a user-guided semi-automatic tool to reduce the human effort and lower the requirement of expertise is necessary. To date, only a few of these approaches have been proposed, and a lack of user evaluation makes it difficult to improve upon this approach. Based on our previous work, we present a user evaluation of a user-guided semi-automatic tool that provides visual guidance to assist users in determining decomposition solutions, accepts sketch-based inputs to create decomposition surfaces, and simplifies the decomposition commands. This user evaluation investigated (1) the usability of the visual guidance, (2) the types of visual guidance essential for decomposition, (3) the effectiveness of the sketch-based decomposition, and (4) the performance differences between beginner and experienced users using the sketch-based decomposition. The result and user feedback indicate that the tool enables users who have limited prior experience or familiarity with the computer-aided engineering software to perform volumetric decomposition more efficiently. The visual guidance increases the success rate of the user's decomposition solution by 28%. The sketch-based decomposition significantly reduces 46% of the user's time on creating decomposition surfaces and setting up decomposition commands. Highlights Evaluations of the user-guided semi-automatic decomposition tool were performed. The visual guidance lowers the required user's expertise level. Sweeping schemes and sweepable regions are essential visual guidance to guide users. The sketch-based decomposition significantly reduces time cost and human efforts.
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Dissertations / Theses on the topic "All-Hexahedral Mesh Generation"

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Earp, Matthew N. "All Hexahedral Meshing of Multiple Source, Multiple Target, Multiple Axis Geometries Via Automatic Grafting and Sweeping." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd762.pdf.

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Yilmaz, Asim Egemen. "Finite Element Modeling Of Electromagnetic Scattering Problems Via Hexahedral Edge Elements." Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608587/index.pdf.

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In this thesis, quadratic hexahedral edge elements have been applied to the three dimensional for open region electromagnetic scattering problems. For this purpose, a semi-automatic all-hexahedral mesh generation algorithm is developed and implemented. Material properties inside the elements and along the edges are also determined and prescribed during the mesh generation phase in order to be used in the solution phase. Based on the condition number quality metric, the generated mesh is optimized by means of the Particle Swarm Optimization (PSO) technique. A framework implementing hierarchical hexahedral edge elements is implemented to investigate the performance of linear and quadratic hexahedral edge elements. Perfectly Matched Layers (PMLs), which are implemented by using a complex coordinate transformation, have been used for mesh truncation in the software. Sparse storage and relevant efficient matrix ordering are used for the representation of the system of equations. Both direct and indirect sparse matrix solution methods are implemented and used. Performance of quadratic hexahedral edge elements is deeply investigated over the radar cross-sections of several curved or flat objects with or without patches. Instead of the de-facto standard of 0.1 wavelength linear element size, 0.3-0.4 wavelength quadratic element size was observed to be a new potential criterion for electromagnetic scattering and radiation problems.
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Book chapters on the topic "All-Hexahedral Mesh Generation"

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Maréchal, Loïc. "Advances in Octree-Based All-Hexahedral Mesh Generation: Handling Sharp Features." In Proceedings of the 18th International Meshing Roundtable. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-04319-2_5.

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Zhang, Yongjie, Xinghua Liang, and Guoliang Xu. "A Robust 2-Refinement Algorithm in Octree and Rhombic Dodecahedral Tree Based All-Hexahedral Mesh Generation." In Proceedings of the 21st International Meshing Roundtable. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-33573-0_10.

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Conference papers on the topic "All-Hexahedral Mesh Generation"

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Shih, Bih-Yaw, and Hiroshi Sakurai. "Automatic Regular Hexahedral Mesh Generation by Regular Volume Decomposition." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/cie-4497.

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Abstract A method has been developed to generate regular hexahedral meshes automatically from arbitrary solid models by volume decomposition. This method first decomposes a solid model having a complex shape into volumes having simple shapes. Then, shape-specific meshing methods like mapping are applied to generate regular hexahedral meshes from these volumes. Finally, all regular hexahedral meshes of these volumes are combined into a regular hexahedral mesh of the original solid model. Thus the method generates regular hexahedral meshes automatically in a way similar to the way a human does interactively. This is in contrast to the previous methods of automatic hexahedral mesh generation, which try to generate hexahedral meshes from solid models directly.
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Andueza, Alejandro, and Segen F. Estefen. "New Algorithm for Full Hexahedral Finite Element Mesh Generation of Pipe Models With Multiple Corrosion Defects." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57526.

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Analysis of corroded pipelines using simulation techniques has become an essential step for the evaluation of the residual ultimate strength of damaged pipes. Problems with multiple corrosion defects present highly complex geometries mainly when the defects are close enough to produce interacting stress fields. In such cases it is easier the mesh generation with all-tetrahedral elements using mature algorithms implemented in commercial programs like Ansys or Patran. The use of all-tetrahedral meshes in many applications yields to less accurate analysis results. Unfortunately, the algorithm for mesh generation of all-hexahedral elements is much more complex than the generation of all-tetrahedral element mesh. Currently, the problem associated with general all-hexahedral element mesh algorithm is a research subject in progress. This paper presents a new algorithm for the mesh generation of all-hexahedral elements to be used in the analysis of damaged pipelines. The algorithm is currently under development and was designed to deal with any number of corrosion defects of arbitrary shape. The application of the new methodology is demonstrated performing the mesh generation of models with one, two and three corrosion defects in order to demonstrate both efficiency and robustness of the new methodology. Finally, computer simulations for the generated models are performed in order to determine the failure pressure of the damaged pipes. The obtained results are compared to the values predicted by the standard DNV RP-F101.
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Zhu, Hua, Shuming Gao, and Chuhua Xian. "Hexahedral Mesh Cutting Using Geometric Model With New Boundaries Well Matched." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70856.

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Hexahedral mesh generation is difficult and time-consuming. To avoid the complicated hexahedral mesh regeneration after each variational design, hexahedral mesh editing can be used. In this paper, an accurate hexahedral mesh cutting approach using geometric model is proposed, and the part of the geometric model inside the mesh model can be complex and arbitrary. In the approach, all the newly added geometric entities resulted from mesh cutting are first generated by performing the subtraction operation between the mesh model and the geometric model. Then, for each newly added geometric element, including point, edge and face, the mesh nodes that need to be moved onto it, are determined and repositioned with the mesh quality considered. To ensure the rationality of mesh nodes determination, for each newly added edge, the mesh nodes are identified using shortest path algorithm. Finally, the mesh elements that should not be in the resultant mesh model are deleted, Pillowing and Smoothing operations are further conducted to improve the mesh quality. Some preliminary results are given to show the feasibility of the approach.
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Kaszynski, Alex A., Joseph A. Beck, and Jeffrey M. Brown. "Automated Meshing Algorithm for Generating As-Manufactured Finite Element Models Directly From As-Measured Fan Blades and Integrally Bladed Disks." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76375.

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Automated tetrahedral meshing from manifold tessellated optical scan data is investigated to determine its viability as an approach for finite element analysis. This approach avoids the costs of constructing a volumetric representation of the scan data that can be meshed with conventional grid generation approaches. This paper demonstrates an auto-meshing algorithm for inserted airfoil and integrally bladed rotor hardware. These automatically generated models are compared to experimentally obtained frequencies and mode shapes for validation. In an effort to compare the fidelity as well as the effect of mesh density on analytical convergence rate, manually generated all-hexahedral models are compared against the auto-meshed tetrahedral finite element models. CPU time, solution accuracy, and mesh convergence are evaluated to determine the viability of automatically generated tetrahedral meshes versus the standard approach of manually generating hex-dominant meshes. This paper demonstrates that given the power of modern CPUs, automatically generated all-tetrahedral meshes can serve as a viable alternative to manually generated hex-dominant finite element models, especially when these meshes can be refined for solution convergence within the auto-mesher. This new approach effectively solves both the mesh convergence problem while demonstrating that models based on as-measured geometry can be rapidly built with virtually no human interaction.
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Shivanna, Kiran H., Nicole A. Kallemeyn, Srinivas C. Tadepalli, Nicole A. DeVries, Vincent A. Magnotta, and Nicole M. Grosland. "IA-FEMesh: An Interactive All Hexahedral Mesh Generator for Discrete Anatomic Closed Surfaces." In ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-192782.

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The broad objective of our software, IA-FEMesh is to aid patient-specific finite element (FE) model development. Patient-specific models hold the potential to enable surgeons to plan care using objective analysis-based tools. Thus, they can better evaluate alternate surgical protocols and treatments, thereby contributing to improved surgical outcome. Our previous efforts were focused on projection techniques specific to the geometry under consideration [1]. The current meshing technique is the generalization of projection techniques that builds upon a multi-block approach, with considerable attention given to incorporating interactive tools to ease the model development process, thereby creating a user friendly approach to anatomic modeling.
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