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Development and implementation of 3D geometry extraction method for topological optimization
Šotola, M. ; Rybanský, D. ; Maršálek, P. ; Halama, R. ; Kopačka, Ján ; Ježek, Ondřej ; Gabriel, Dušan ; Tejc, J. ; Pašek, M. ; Kovář, L.
This research report TN01000024/08-V012 is an output of the subtask of the project TN1000024/08 Automation and production system optimization, one of the objectives of which is to develop methods of post-processing of topological optimization (TO) results in cooperation with MECAS ESI Ltd. Three different smoothing approaches are discussed: the Taubin method, volume representation using radial basis functions and smoothing by remeshing using the Netgen library.
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Review of methods for the post-processing of topological optimization results
Kopačka, Ján ; Ježek, Ondřej ; Gabriel, Dušan ; Šotola, Martin ; Rybanský, David ; Maršálek, Pavel ; Halama, R. ; Tejc, J. ; Pašek, M. ; Kovář, L.
The research report is an output of the sub-project TN1000024/08: Automation and production system optimization in cooperation with MECAS ESI Ltd on the development of methods for post-processing of topological optimization (TO) results. In this report a detailed survey of these methods is introduced as necessary tool for seamless integration of the results TO with subsequent numerical simulations and additive manufacturing. The selected method for post-processing based on a level-set approach using radial basis functions has been implemented and successfully tested on a well-known 2D Messerschmitt-Bölkow-Blohm (MBB) beam test problem.
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Assessment of post-processing capabilities in selected software for topology optimization
Ježek, Ondřej ; Kopačka, Ján ; Gabriel, Dušan
Topology optimization (TO) has come to the fore in recent years, especially with the development of 3D printing. Finite element systems often include TO functionality based on either\ndensity-based or level set methods. In the case of the first-mentioned method, the results of TO are further processed into geometry suitable for additive manufacturing. However, current\nprograms only include basic post-processing capabilities with minimal customization options. This paper will first briefly summarize the theoretical background of TO and post-processing\nmethods. Next, selected commercial TO programs will be compared from the perspective of shape post-processing. The final part will be devoted to applying the level set method for shape\npost-processing of a topologically optimized industrial robot gripper.
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Optimization of 3D printing for Flexible Machines
Novotný, Jaroslav ; Kopačka, Ján ; Čertíková, Marta ; Joch, Jaroslav ; Ježek, Ondřej
The presented research report is the main result of the project task. It is concerned with the theory of topology optimization (TO), as well as with the overview of related methods, and with the description of algorithms. Further, our own algorithm of TO is described and complemented by 2D and 3D examples. The process of TO for a griper of flexible robots is demonstrated, including the subsequent TO post-processing, preparation of 3D print-file, and 3D printing. Properties of prints, when using various 3D printers, are analyzed and documented on printed samples, including a basic economic evaluation.
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