Regularity and approximation of strong solutions to rate-independent systems
Rate-independent systems arise in a number of applications. Usually, weak solutions to such problems with potentially very low regularity are considered, requiring mathematical techniques capable of handling nonsmooth functions. In this work, we prove the existence of Hölder-regular strong solutions...
| Egile Nagusiak: | , , |
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| Formatua: | Journal article |
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World Scientific Publishing
2017
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| _version_ | 1826306235206467584 |
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| author | Rindler, F Schwarzacher, S Süli, E |
| author_facet | Rindler, F Schwarzacher, S Süli, E |
| author_sort | Rindler, F |
| collection | OXFORD |
| description | Rate-independent systems arise in a number of applications. Usually, weak solutions to such problems with potentially very low regularity are considered, requiring mathematical techniques capable of handling nonsmooth functions. In this work, we prove the existence of Hölder-regular strong solutions for a class of rate-independent systems. We also establish additional higher regularity results that guarantee the uniqueness of strong solutions. The proof proceeds via a time-discrete Rothe approximation and careful elliptic regularity estimates depending in a quantitative way on the (local) convexity of the potential featuring in the model. In the second part of the paper, we show that our strong solutions may be approximated by a fully discrete numerical scheme based on a spatial finite element discretization, whose rate of convergence is consistent with the regularity of strong solutions whose existence and uniqueness are established. |
| first_indexed | 2024-03-07T06:44:51Z |
| format | Journal article |
| id | oxford-uuid:fa885ba2-07b4-4ffb-91aa-d2e0d838b14d |
| institution | University of Oxford |
| last_indexed | 2024-03-07T06:44:51Z |
| publishDate | 2017 |
| publisher | World Scientific Publishing |
| record_format | dspace |
| spelling | oxford-uuid:fa885ba2-07b4-4ffb-91aa-d2e0d838b14d2022-03-27T13:06:39ZRegularity and approximation of strong solutions to rate-independent systemsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:fa885ba2-07b4-4ffb-91aa-d2e0d838b14dSymplectic Elements at OxfordWorld Scientific Publishing2017Rindler, FSchwarzacher, SSüli, ERate-independent systems arise in a number of applications. Usually, weak solutions to such problems with potentially very low regularity are considered, requiring mathematical techniques capable of handling nonsmooth functions. In this work, we prove the existence of Hölder-regular strong solutions for a class of rate-independent systems. We also establish additional higher regularity results that guarantee the uniqueness of strong solutions. The proof proceeds via a time-discrete Rothe approximation and careful elliptic regularity estimates depending in a quantitative way on the (local) convexity of the potential featuring in the model. In the second part of the paper, we show that our strong solutions may be approximated by a fully discrete numerical scheme based on a spatial finite element discretization, whose rate of convergence is consistent with the regularity of strong solutions whose existence and uniqueness are established. |
| spellingShingle | Rindler, F Schwarzacher, S Süli, E Regularity and approximation of strong solutions to rate-independent systems |
| title | Regularity and approximation of strong solutions to rate-independent
systems |
| title_full | Regularity and approximation of strong solutions to rate-independent
systems |
| title_fullStr | Regularity and approximation of strong solutions to rate-independent
systems |
| title_full_unstemmed | Regularity and approximation of strong solutions to rate-independent
systems |
| title_short | Regularity and approximation of strong solutions to rate-independent
systems |
| title_sort | regularity and approximation of strong solutions to rate independent systems |
| work_keys_str_mv | AT rindlerf regularityandapproximationofstrongsolutionstorateindependentsystems AT schwarzachers regularityandapproximationofstrongsolutionstorateindependentsystems AT sulie regularityandapproximationofstrongsolutionstorateindependentsystems |