Results 71 to 80 of about 235,245 (284)
Scaling Laws in the Ductile Fracture of Metallic Crystals [PDF]
, 2015 We explore whether the continuum scaling behavior of the fracture energy of metals extends down to the atomistic level. We use an embedded atom method (EAM) model of Ni, thus bypassing the need to model strain-gradient plasticity at the continuum level ...
Baskes, M. I., Ortiz, M.
core +1 more source
Journal of Materials Research and Technology, 2023 The particle/matrix interface of metal matrix composites (MMCs) can give rise to extra strength and then affect the local deformation behavior. This strengthening effect originates from the plastic strain gradients due to the incompatibility of plastic ...
He Wu +5 more
doaj
Deformation compatibility in a single crystalline Ni superalloy [PDF]
, 2015 Deformation in materials is often complex and requires rigorous understanding to predict engineering component lifetime. Experimental understanding of deformation requires utilization of advanced characterization techniques, such as high spatial ...
Britton, T, Dunne, F, Jiang, J, Zhang, T
core +2 more sources
An energy residual-based approach to gradient effects within the mechanics of generalized continua
Journal 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
Interfaces within strain gradient plasticity: Theory and experiments [PDF]
Acta Materialia, 2006 In this paper, it is shown'that the occurrence of dislocation pileups across grain boundaries, as well as subsequent emission to the adjacent grains, is captured theoretically by gradient plasticity and confirmed experimentally by nanoindentation. From a theoretical point of view, this is accomplished (within a deformation theory framework applicable ...
John R. Willis +4 more
openaire +2 more sources
A finite element framework for distortion gradient plasticity with applications to bending of thin foils [PDF]
International Journal of Solids and Structures 96, pp. 288-299
(2016), 2017 A novel general purpose Finite Element framework is presented to study small-scale metal plasticity. A distinct feature of the adopted distortion gradient plasticity formulation, with respect to strain gradient plasticity theories, is the constitutive inclusion of the plastic spin, as proposed by Gurtin (2004) through the prescription of a free energy ...
arxiv +1 more source
A method to extract slip system dependent information for crystal plasticity models
MethodsX, 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
Two-scale homogenization for a model in strain gradient plasticity [PDF]
ESAIM: Control, Optimisation and Calculus of Variations, 2010 Using the tool of two-scale convergence, we provide a rigorous mathematical setting for the homogenization result obtained by Fleck and Willis (J. Mech. Phys. Solids 52 (2004) 1855- 1888) concerning the effective plastic behaviour of a strain gradient composite material.
GIACOMINI, Alessandro, Musesti A.
openaire +2 more sources
On the Derivation of Boundary Conditions for Continuum Dislocation Dynamics
Crystals, 2017 Continuum dislocation dynamics (CDD) is a single crystal strain gradient plasticity theory based exclusively on the evolution of the dislocation state.
Thomas Hochrainer
doaj +1 more source
On the existence of minimisers for strain‐gradient single‐crystal plasticity [PDF]
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2017 AbstractWe prove the existence of minimisers for a family of models related to the single‐slip‐to‐single‐plane relaxation of single‐crystal, strain‐gradient elastoplasticity with ‐hardening penalty. In these relaxed models, where only one slip‐plane normal can be activated at each material point, the main challenge is to show that the energy of ...
Keith Anguige +3 more
openaire +4 more sources