$Γ$-convergence involving nonlocal gradients with varying horizon: Recovery of local and fractional models
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| Format: | Preprint |
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2024
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| _version_ | 1866917652454178816 |
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| author | Cueto, Javier Kreisbeck, Carolin Schönberger, Hidde |
| author_facet | Cueto, Javier Kreisbeck, Carolin Schönberger, Hidde |
| contents | This work revolves around the rigorous asymptotic analysis of models in nonlocal hyperelasticity. The corresponding variational problems involve integral functionals depending on nonlocal gradients with a finite interaction range $δ$, called the horizon. After an isotropic scaling of the associated kernel functions, we prove convergence results in the two critical limit regimes of vanishing and diverging horizon. While the nonlocal gradients localize to the classical gradient as $δ\to 0$, we recover the Riesz fractional gradient as $δ\to \infty$, irrespective of the nonlocal gradient we started with. Besides rigorous convergence statements for the nonlocal gradients, our analysis in both cases requires compact embeddings uniformly in $δ$ as a crucial ingredient. These tools enable us to derive the $Γ$-convergence of quasiconvex integral functionals with varying horizon to their local and fractional counterparts, respectively. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_18509 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | $Γ$-convergence involving nonlocal gradients with varying horizon: Recovery of local and fractional models Cueto, Javier Kreisbeck, Carolin Schönberger, Hidde Analysis of PDEs 49J45, 35R11, 74A70 This work revolves around the rigorous asymptotic analysis of models in nonlocal hyperelasticity. The corresponding variational problems involve integral functionals depending on nonlocal gradients with a finite interaction range $δ$, called the horizon. After an isotropic scaling of the associated kernel functions, we prove convergence results in the two critical limit regimes of vanishing and diverging horizon. While the nonlocal gradients localize to the classical gradient as $δ\to 0$, we recover the Riesz fractional gradient as $δ\to \infty$, irrespective of the nonlocal gradient we started with. Besides rigorous convergence statements for the nonlocal gradients, our analysis in both cases requires compact embeddings uniformly in $δ$ as a crucial ingredient. These tools enable us to derive the $Γ$-convergence of quasiconvex integral functionals with varying horizon to their local and fractional counterparts, respectively. |
| title | $Γ$-convergence involving nonlocal gradients with varying horizon: Recovery of local and fractional models |
| topic | Analysis of PDEs 49J45, 35R11, 74A70 |
| url | https://arxiv.org/abs/2404.18509 |