Asynchronous time integration while achieving zero interface energy

0580081 - ÚT 2024 RIV CZ eng C - Conference Paper (international conference)
Dvořák, Radim - Kolman, Radek - Falta, J. - Neühauserová, M.
Asynchronous time integration while achieving zero interface energy.
Acta Polytechnica CTU Proceedings. Vol. 42. Prague: Czech Technical University in Prague, 2023 - (Kytýř, D.; Doktor, T.; Zlámal, P.), s. 6-11. E-ISSN 2336-5382.
[Youth Symposium on Experimental Solid Mechanics /18./. Telč (CZ), 11.06.2023-14.06.2023]
R&D Projects: GA ČR(CZ) GF22-00863K
Grant - others:AV ČR(CZ) EstAV-21-02
Program: Bilaterální spolupráce
Institutional support: RVO:61388998
Keywords : finite element method * direct time integration * asynchronous integration * domain decomposition * localized lagrange multipliers
OECD category: Applied mechanics

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.
Permanent Link: https://hdl.handle.net/11104/0349431