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Augmented Lagrangian approach to deriving discontinuous Galerkin methods for nonlinear elasticity problems
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.ORCID iD: 0000-0001-7352-1550
Umeå Univ, Dept Math & Math Stat, Umeå, Sweden.
2022 (English)In: International Journal for Numerical Methods in Engineering, ISSN 0029-5981, E-ISSN 1097-0207, Vol. 123, no 18, p. 4407-4421Article in journal (Refereed) Published
Abstract [en]

We use the augmented Lagrangian formalism to derive discontinuous Galerkin (DG) formulations for problems in nonlinear elasticity. In elasticity, stress is typically a symmetric function of strain, leading to symmetric tangent stiffness matrices in Newton's method when conforming finite elements are used for discretization. By use of the augmented Lagrangian framework, we can also obtain symmetric tangent stiffness matrices in DG methods. We suggest two different approaches and give examples from plasticity and from large deformation hyperelasticity.

Place, publisher, year, edition, pages
John Wiley & Sons, 2022. Vol. 123, no 18, p. 4407-4421
Keywords [en]
antiplane shear plasticity, augmented Lagrangian, discontinuous Galerkin, finite elasticity, Nitsche's method
National Category
Mathematics
Identifiers
URN: urn:nbn:se:hj:diva-57046DOI: 10.1002/nme.7039ISI: 000799985600001Local ID: HOA;;816646OAI: oai:DiVA.org:hj-57046DiVA, id: diva2:1667375
Funder
Swedish Research Council, 2017-03911, 2018-05262, 2021-04925Available from: 2022-06-10 Created: 2022-06-10 Last updated: 2022-09-16Bibliographically approved

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Hansbo, Peter

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