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Hybridized augmented Lagrangian methods for contact problems
Mathematics, University College London, United Kingdom.
Mechanical Engineering, Jönköping University, Sweden.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för matematik och matematisk statistik.ORCID-id: 0000-0001-5589-4521
2025 (engelsk)Inngår i: Computer Methods in Applied Mechanics and Engineering, ISSN 0045-7825, E-ISSN 1879-2138, Vol. 445, artikkel-id 118175Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This paper addresses the problem of friction-free contact between two elastic bodies. We develop an augmented Lagrangian method that provides computational convenience by reformulating the contact problem as a nonlinear variational equality. To achieve this, we propose a Nitsche-based method incorporating a hybrid displacement variable defined on an interstitial layer. This approach enables complete decoupling of the contact domains, with interaction occurring exclusively through the interstitial layer. The layer is independently approximated, eliminating the need to handle intersections between unrelated meshes. Additionally, the method supports introducing an independent model on the interface, which we leverage to represent a membrane covering one of the bodies as well as a plate resting on one of the bodies. We present the formulation of the method, establish stability and error estimates, and demonstrate its practical utility through illustrative numerical examples.

sted, utgiver, år, opplag, sider
2025. Vol. 445, artikkel-id 118175
Emneord [en]
Augmented Lagrangian, Elastic contact, Hybridization
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-242106DOI: 10.1016/j.cma.2025.118175Scopus ID: 2-s2.0-105009630302OAI: oai:DiVA.org:umu-242106DiVA, id: diva2:1983371
Forskningsfinansiär
Swedish Research Council, 2021-04925Swedish Research Council, 2022-03908eSSENCE - An eScience CollaborationTilgjengelig fra: 2025-07-10 Laget: 2025-07-10 Sist oppdatert: 2025-07-10bibliografisk kontrollert

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Larson, Mats G.

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