Results 61 to 70 of about 3,870,040 (252)
Nonstationary aspects of passive scalar gradient behaviour [PDF]
European Journal of Mechanics - B/Fluids, Elsevier, 2008, 27,
pp.433 - 443, 2017 The dynamics of a passive scalar gradient experiencing fluctuating velocity gradient through the Lagrangian variations of strain persistence is studied. To this end, a systematic, numerical analysis based on the equation for the orientation of the gradient of a non-diffusive scalar in two-dimensional flow is performed. When the gradient responds weakly
arxiv +1 more source
Absence of Walker breakdown in the dynamics of chiral Neel domain walls driven by in-plane strain gradients [PDF]
, 2022 We investigate theoretically the motion of chiral N\'eel domain walls in perpendicularly magnetized systems driven by in-plane strain gradients. We show that such strain drives domain walls efficiently towards increasing tensile (compressive) strain for positive (negative) magnetostrictive materials.
arxiv +1 more source
Spectral alignment of single-photon emitters in diamond using strain gradient
, 2018 Solid-state single-photon emitters are attractive for realization of integrated quantum systems due to their experimental convenience and scalability. Unfortunately, however, their complex mesoscopic environments cause photons from different emitters to ...
Bielejec, Edward +7 more
core +1 more source
Weak Solutions within the Gradient-Incomplete Strain-Gradient Elasticity [PDF]
Lobachevskii Journal of Mathematics, 2020 In this paper we consider existence and uniqueness of the three-dimensional static boundary-value problems in the framework of so-called gradient-incomplete strain-gradient elasticity. We call the strain-gradient elasticity model gradient-incomplete such model where the considered strain energy density depends on displacements and only on some specific
Eremeyev V. A., dell'Isola F.
openaire +3 more sources
Gradient-enhanced statistical analysis of cleavage fracture [PDF]
European Journal of Mechanics A/Solids (2019), 2019 We present a probabilistic framework for brittle fracture that builds upon Weibull statistics and strain gradient plasticity. The constitutive response is given by the mechanism-based strain gradient plasticity theory, aiming to accurately characterize crack tip stresses by accounting for the role of plastic strain gradients in elevating local ...
arxiv +1 more source
Zeitschrift für Angewandte Mathematik und Physik, 2020 In this paper, it is proven an existence and uniqueness theorem for weak solutions of the equilibrium problem for linear isotropic dilatational strain gradient elasticity. Considered elastic bodies have as deformation energy the classical one due to Lamé
V. Eremeyev +3 more
semanticscholar +1 more source
Non-singular dislocation continuum theories: Strain gradient elasticity versus Peierls-Nabarro model [PDF]
Philosophical Magazine 97 (2017), 3246-3275, 2017 Non-singular dislocation continuum theories are studied. A comparison between Peierls-Nabarro dislocations and straight dislocations in strain gradient elasticity is given. The non-singular displacement fields, non-singular stresses, plastic distortions and dislocation core shapes are analyzed and compared for the two models.
arxiv +1 more source
Materials & Design, 2022 Gradient structured materials have been proven to have excellent mechanical properties, such as strength–ductility synergy and excellent strain hardening.
Xihang Zhao +4 more
doaj
Effective strain gradient continuum model of metamaterials and size effects analysis
Continuum Mechanics and Thermodynamics, 2020 In this paper, a strain gradient continuum model for a metamaterial with a periodic lattice substructure is considered. A second gradient constitutive law is postulated at the macroscopic level.
Hua Yang +3 more
semanticscholar +1 more source
Advances in Civil Engineering, 2018 The existence of the threshold hydraulic gradient in clays under a low hydraulic gradient has been recognized by many studies. Meanwhile, most nature clays to some extent exist in an overconsolidated state more or less.
Chuanxun Li +3 more
doaj +1 more source