Results 21 to 30 of about 88,232 (305)

A gradient theory based on the Aifantis theory using the Gurtin-Anand strain gradient plasticity approach

open access: yesJournal of the Mechanical Behavior of Materials, 2018
This article investigates the differences between the Aifantis and Gurtin-Anand strain gradient plasticity. The fact that Gurtin-Anand strain gradient plasticity is richer than the Aifantis strain gradient plasticity provides a basis for which we could ...
Borokinni Adebowale S.
doaj   +1 more source

Quantifying population and clone-specific non-linear reaction norms to food gradients in Daphnia magna

open access: yesFrontiers in Ecology and Evolution, 2022
Phenotypic plasticity is normally quantified as a reaction norm which details how trait expression changes across an environmental gradient. Sometime reaction norms are linear, but often reaction norms are assumed to be linear because plasticity is ...
Stewart J. Plaistow   +3 more
doaj   +1 more source

A method to extract slip system dependent information for crystal plasticity models

open access: yesMethodsX, 2022
A tool to implement a length scale dependency to classical crystal plasticity simulations is presented. Classical crystal plasticity models do not include a size effect; therefore, the size of the grain does not influence the simulated deformation ...
Dylan Agius   +4 more
doaj   +1 more source

Modeling the zonal disintegration of rocks near deep level tunnels by gradient internal variable continuous phase transition theory

open access: yesJournal of the Mechanical Behavior of Materials, 2015
The occurrence of alternating damage zones surrounding underground openings (commonly known as zonal disintegration) is treated as a “far from thermodynamic equilibrium” dynamical process or a nonlinear continuous phase transition phenomenon.
Haoxiang Chen   +4 more
doaj   +1 more source

A minimal gradient-enhancement of the classical continuum theory of crystal plasticity. Part I: The hardening law

open access: yesArchives of Mechanics, 2016
A simple gradient-enhancement of the classical continuum theory of plasticity of single crystals deformed by multislip is proposed for incorporating size effects in a manner consistent with phenomenological laws established in materials science.
H. Petryk, S. Stupkiewicz
doaj   +1 more source

An effect of a purely dissipative process of microstresses on plane strain gradient plasticity problems [PDF]

open access: yesTheoretical and Applied Mechanics, 2018
This article considers a plane strain gradient plasticity theory of the Gurtin–Anand model [M. Gurtin, L. Anand, A theory of strain gradient plasticity for isotropic, plastically irrotational materials Part I: Small deformations, J. Mech. Phys. Solids 53
Borokinni Adebowale   +2 more
doaj   +1 more source

Line-tension model for plasticity as the Gamma-limit of a nonlinear dislocation energy [PDF]

open access: yes, 2012
In this paper we rigorously derive a line-tension model for plasticity as the Gamma-limit of a nonlinear mesoscopic dislocation energy, without resorting to the introduction of an ad hoc cut-off radius.
Scardia, L.   +4 more
core   +1 more source

An energy residual-based approach to gradient effects within the mechanics of generalized continua

open access: yesJournal of the Mechanical Behavior of Materials, 2012
Generalized continua exhibiting gradient effects are addressed through a method grounded on the energy residual (ER)-based gradient theory by the first author and coworkers.
Polizzotto Castrenze, Pisano Aurora A.
doaj   +1 more source

Meta-SpikePropamine: learning to learn with synaptic plasticity in spiking neural networks

open access: yesFrontiers in Neuroscience, 2023
We propose that in order to harness our understanding of neuroscience toward machine learning, we must first have powerful tools for training brain-like models of learning.
Samuel Schmidgall   +2 more
doaj   +1 more source

Gradient Plasticity for Single Crystals [PDF]

open access: yesPAMM, 2010
AbstractThe kinematic relationship between classical single crystal kinematics and geometrically necessary dislocations will be clarified by a demonstrative example. The starting point for the dynamics is the contribution of geometrically necessary dislocations to the free energy, which leads to a kinematic hardening law. A simple two‐dimensional shear
Wulfinghoff, S., Böhlke, T.
openaire   +2 more sources

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