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An unbiased self-contact formulation for explicit FEA stabilized by the bipenalty method
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SYSNO ASEP 0518691 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title An unbiased self-contact formulation for explicit FEA stabilized by the bipenalty method Author(s) Kopačka, Ján (UT-L) RID, ORCID
Gabriel, Dušan (UT-L) RID, ORCID
Kolman, Radek (UT-L) RIDNumber of authors 3 Source Title GACM Colloquium on Computational Mechanics For Young Scientists From Academia and Industry. - Kassel, Germany : University of Kassel, Germany, 2019 / Gleim T. ; Lange S. - ISBN 978-3-7376-5093-9 Pages s. 255-258 Number of pages 4 s. Publication form Online - E Action GACM Colloquium on Computational Mechanics For Young Scientists From Academia and Industry /8./ Event date 28.08.2019 - 30.08.2019 VEvent location University of Kassel Country DE - Germany Event type WRD Language eng - English Country DE - Germany Keywords finite element method ; self-contact ; bipenalty method Subject RIV JC - Computer Hardware ; Software OECD category Applied mechanics R&D Projects GA19-04956S GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) EF15_003/0000493 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UT-L - RVO:61388998 Annotation In the explicit finite element analysis (FEA), contact boundary conditions are often enforced by the penalty method. However, it is well known that the penalty parameter negatively affects the size of the critical time step of the explicit time integration scheme. A remedy to this issue could provide the bipenalty method. Recently, promising results for 1D contact-impact problems have con rmed this idea. Therefore,further development and testing for higher spatial dimensions followed. The objective of this contribution is to present the energy conservation properties of the bipenalty method and thus to prove the suitability of this approach for solving the explicit FEA contact-impact problems. To this end, a symmetry preserving contact algorithm has been modifed to consider self-contact. Several numerical examples will be presented to demonstrate the performance of the proposed contact algorithm. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2020
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