A unifying perspective: the relaxed linear micromorphic continuum

P Neff, ID Ghiba, A Madeo, L Placidi, G Rosi - Continuum Mechanics and …, 2014 - Springer
We formulate a relaxed linear elastic micromorphic continuum model with symmetric Cauchy
force stresses and curvature contribution depending only on the micro-dislocation tensor …

Wave propagation in relaxed micromorphic continua: modeling metamaterials with frequency band-gaps

A Madeo, P Neff, ID Ghiba, L Placidi, G Rosi - Continuum Mechanics and …, 2015 - Springer
In this paper, the relaxed micromorphic model proposed in Ghiba et al.(Math Mech Solids,
2013), Neff et al.(Contin Mech Thermodyn, 2013) has been used to study wave propagation …

[HTML][HTML] Mechanical characterization of hyperelastic polydimethylsiloxane by simple shear test

LCS Nunes - Materials Science and Engineering: A, 2011 - Elsevier
Polydimethylsiloxane (PDMS) is a commercially silicone rubber widely used in mechanical
sensors, electronic products and medical devices. This paper describes and analyzes the …

Localization in anisotropic elastoplastic micropolar media: Application to fiber reinforced composites

AD Hasanyan, AM Waas - Journal of the Mechanics and Physics of Solids, 2018 - Elsevier
In this paper, an anisotropic elastoplastic constitutive model is formulated for fiber reinforced
composites, undergoing large geometric deformation. The composite material is modeled as …

The relaxed linear micromorphic continuum: well-posedness of the static problem and relations to the gauge theory of dislocations

P Neff, ID Ghiba, M Lazar… - Quarterly Journal of …, 2015 - ieeexplore.ieee.org
We consider the equilibrium problem in the relaxed linear model of micromorphic elastic
materials. The basic kinematical fields of this extended continuum model are the …

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 …

Analytical solutions of the simple shear problem for micromorphic models and other generalized continua

G Rizzi, G Hütter, A Madeo, P Neff - Archive of Applied Mechanics, 2021 - Springer
To draw conclusions as regards the stability and modelling limits of the investigated
continuum, we consider a family of infinitesimal isotropic generalized continuum models …

Fourth-order tensor algebraic operations and matrix representation in continuum mechanics

DC Kellermann, MM Attard, DJ O'Shea - Archive of Applied Mechanics, 2021 - Springer
This paper presents a system of cyclic tensor algebra for operations involving fourth-order
tensors. The advantages are that the system is objectively and consistently defined in three …

A logarithmic minimization property of the unitary polar factor in the spectral and Frobenius norms

P Neff, Y Nakatsukasa, A Fischle - SIAM Journal on Matrix Analysis and …, 2014 - SIAM
The unitary polar factor Q=U_p in the polar decomposition of Z=U_p\,H is the minimizer over
unitary matrices Q for both ‖\rmLog(Q^*Z)‖^2 and its Hermitian part ‖\rmsym__*\!(\rmLog …

Transversely isotropic material: nonlinear Cosserat versus classical approach

I Münch, P Neff, W Wagner - Continuum Mechanics and Thermodynamics, 2011 - Springer
We consider a specific case of unidirectional reinforced material under applied tensile load.
The reinforcement of the material is inclined with 45° to the direction of the tensile resultant …