An unbiased self-contact formulation for explicit FEA stabilized by the bipenalty method

0518691 - ÚT 2020 RIV DE eng C - Konferenční příspěvek (zahraniční konf.)
Kopačka, Ján - Gabriel, Dušan - Kolman, Radek
An unbiased self-contact formulation for explicit FEA stabilized by the bipenalty method.
GACM Colloquium on Computational Mechanics For Young Scientists From Academia and Industry. Kassel, Germany: University of Kassel, Germany, 2019 - (Gleim, T.; Lange, S.), s. 255-258. ISBN 978-3-7376-5093-9.
[GACM Colloquium on Computational Mechanics For Young Scientists From Academia and Industry /8./. University of Kassel (DE), 28.08.2019-30.08.2019]
Grant CEP: GA AV ČR(CZ) GA19-04956S; GA MŠMT(CZ) EF15_003/0000493
Institucionální podpora: RVO:61388998
Klíčová slova: finite element method * self-contact * bipenalty method
Obor OECD: Applied mechanics

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.
Trvalý link: http://hdl.handle.net/11104/0304520