Dislocation microstructures and strain-gradient plasticity with one active slip plane
, 2015 We study dislocation networks in the plane using the vectorial phase-field model introduced by Ortiz and coworkers, in the limit of small lattice spacing.
Conti, Sergio +2 more
core +1 more source
Pseudo Jahn-Teller Effect In The Origin Of Enhanced Flexoelectricity [PDF]
, 2015 The controversy between the theory and experiment in explaining the origin of enhanced flexoelectricity is removed by taking into account the pseudo Jahn-Teller effect (PJTE) which, under certain conditions, creates local dipolar distortions of dynamic ...
I. B. Bersuker, Kogan S. M.
core +1 more source
Some properties of the dissipative model of strain-gradient plasticity [PDF]
, 2016 A theoretical and computational investigation is carried out of a dissipative model of rate-independent strain-gradient plasticity and its regularization.
Carstensen, C +4 more
core +2 more sources
The influence of elastic strain gradient on the upper limit of flexocoupling strength, spatially-modulated phases and soft phonon dispersion in ferroics [PDF]
, 2016 Within the framework of Landau-Ginzburg-Devonshire (LGD) theory we studied the role of the flexocoupling between the order parameter and elastic strain gradients in the stability of a spatially-modulated phase (SMP) in ferroics with commensurate and incommensurate long-range ordered phases under the presence of squired elastic strain gradient.
arxiv +1 more source
Modeling the hall-petch effect with a gradient crystal plasticity theory including a grain boundary yield criterion [PDF]
, 2013 . A strain gradient crystal plasticity theory including the gradient of the equiv- alent plastic strain ∇γeq is discussed. A grain boundary yield condition is proposed in order to account for the influence of the grain boundaries ...
Bayerschen, Eric +2 more
core
Towards a bulk theory of flexoelectricity
, 2010 Flexoelectricity is the linear response of polarization to a strain gradient. Here we address the simplest class of dielectrics, namely elemental cubic crystals, and we prove that therein there is no extrinsic (i.e.
J. D. Jackson +2 more
core +1 more source
Timoshenko nonlocal strain gradient nanobeams: Variational consistency, exact solutions and carbon nanotube Young moduli [PDF]
Mechanics of Advanced Materials and Structures, 2019 Carbon nanotubes (CNTs) are principal constituents of nanocomposites and nano-systems. CNT size-dependent response assessment is therefore a topic of current interest in Mechanics of Advanced Materials and Structures.
R. Barretta +3 more
semanticscholar +1 more source
Flexoelectricity in oxide thin films
Journal of Advanced DielectricsFlexoelectric effect describes the electromechanical coupling between the strain gradient and its internal polarization in all dielectrics. Despite this universality, the resulting flexoelectric field remains small at the macroscopic level.
Guoyang Shen +4 more
doaj +1 more source
Strain gradient induced polarization in SrTiO3 single crystals
, 2007 Piezoelectricity is inherent only in noncentrosymmetric materials, but a piezoelectric response can also be obtained in centrosymmetric crystals if subjected to inhomogeneous deformation. This phenomenon, known as flexoelectricity, affects the functional
A. Buckley +10 more
core +1 more source
Damage process of a fiber bundle with a strain gradient [PDF]
, 2008 We study the damage process of fiber bundles in a wedge-shape geometry which ensures a constant strain gradient. To obtain the wedge geometry we consider the three-point bending of a bar, which is modelled as two rigid blocks glued together by a thin ...
Kun, Ferenc, Nagy, Sandor
core +2 more sources