Novel H (symCurl)-conforming finite elements for the relaxed micromorphic sequence

A Sky, M Neunteufel, P Lewintan, A Zilian… - Computer Methods in …, 2024 - Elsevier
In this work we construct novel H (sym Curl)-conforming finite elements for the recently
introduced relaxed micromorphic sequence, which can be considered as the completion of …

Size-effects of metamaterial beams subjected to pure bending: on boundary conditions and parameter identification in the relaxed micromorphic model

M Sarhil, L Scheunemann, J Schröder, P Neff - Computational Mechanics, 2023 - Springer
In this paper we model the size-effects of metamaterial beams under bending with the aid of
the relaxed micromorphic continuum. We analyze first the size-dependent bending stiffness …

Higher order Bernstein–Bézier and Nédélec finite elements for the relaxed micromorphic model

A Sky, I Muench, G Rizzi, P Neff - Journal of Computational and Applied …, 2024 - Elsevier
The relaxed micromorphic model is a generalized continuum model that is well-posed in the
space X=[H 1] 3×[H (curl)] 3. Consequently, finite element formulations of the model rely on …

Lagrange and based finite element formulations for the relaxed micromorphic model

J Schröder, M Sarhil, L Scheunemann, P Neff - Computational Mechanics, 2022 - Springer
Modeling the unusual mechanical properties of metamaterials is a challenging topic for the
mechanics community and enriched continuum theories are promising computational tools …

[HTML][HTML] A computational approach to identify the material parameters of the relaxed micromorphic model

M Sarhil, L Scheunemann, P Lewintan… - Computer Methods in …, 2024 - Elsevier
We determine the material parameters in the relaxed micromorphic generalized continuum
model for a given periodic microstructure in this work. This is achieved through a least …

Optimal incompatible Korn–Maxwell–Sobolev inequalities in all dimensions

F Gmeineder, P Lewintan, P Neff - Calculus of Variations and Partial …, 2023 - Springer
We characterise all linear maps A: R n× n→ R n× n such that, for 1≤ p< n, PL p∗(R n)≤ c (A
[P] L p∗(R n)+ Curl PL p (R n)) holds for all compactly supported P∈ C c∞(R n; R n× n) …

[HTML][HTML] Polytopal templates for semi-continuous vectorial finite elements of arbitrary order on triangulations and tetrahedralizations

A Sky, I Muench - Finite Elements in Analysis and Design, 2024 - Elsevier
The Hilbert spaces H (curl) and H (div) are employed in various variational problems
formulated in the context of the de Rham complex in order to guarantee well-posedness …

Symmetric unisolvent equations for linear elasticity purely in stresses

A Sky, A Zilian - International Journal of Solids and Structures, 2024 - Elsevier
In this work we introduce novel stress-only formulations of linear elasticity with special
attention to their approximate solution using weighted residual methods. We present four …

Green's functions for the isotropic planar relaxed micromorphic model—Concentrated force and concentrated couple

P Gourgiotis, G Rizzi, P Lewintan, D Bernardini… - International Journal of …, 2024 - Elsevier
We derive the Green's functions (concentrated force and couple in an infinite space) for the
isotropic planar relaxed micromorphic model. Since the relaxed micromorphic model …

Intrinsic mixed-dimensional beam-shell-solid couplings in linear Cosserat continua via tangential differential calculus

A Sky, JS Hale, A Zilian, SPA Bordas, P Neff - Computer Methods in …, 2024 - Elsevier
We present an approach to the coupling of mixed-dimensional continua by employing the
mathematically enriched linear Cosserat micropolar model. The kinematical reduction of the …