Original title: Asynchronous time integration while achieving zero interface energy
Authors: Dvořák, Radim ; Kolman, Radek ; Falta, J. ; Neühauserová, M.
Document type: Papers
Conference/Event: Youth Symposium on Experimental Solid Mechanics /18./, Telč (CZ), 20230611
Year: 2023
Language: eng
Abstract: This contribution deals with an asynchronous direct time integration of the finite-element model. The proposed method is applied to the phenomenon of wave propagation through an elastic linear continuum. The numerical model is partitioned into individual subdomains using the domain decomposition method by means of localized Lagrange multipliers. For each subdomain, different time discretizations are used. No restrictions for relation between subdomain’s time steps are imposed. The coupling of the subdomains is forced by an acceleration continuity condition. Additionally, we use the a posteriori technique to also provide the displacement and velocity continuity at the interfaces, and hence we obtain exact continuity of all three kinematic fields. The proposed method is experimentally validated using the modified SHPB (split Hopkinson pressure bar) setup.
Keywords: asynchronous integration; direct time integration; domain decomposition; finite element method; localized lagrange multipliers
Project no.: EstAV-21-02, GF22-00863K (CEP)
Funding provider: AV ČR, GA ČR
Host item entry: Acta Polytechnica CTU Proceedings

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: https://hdl.handle.net/11104/0349431

Permalink: http://www.nusl.cz/ntk/nusl-613863


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Research > Institutes ASCR > Institute of Thermomechanics
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