Strain gradient continuum plasticity theories: theoretical, numerical and experimental investigations
GZ Voyiadjis, Y Song - International Journal of Plasticity, 2019 - Elsevier
Over the last three decades, a number of researchers have used the gradient-enhanced
plasticity theory to model the microstructural material behavior, which is not able to be …
plasticity theory to model the microstructural material behavior, which is not able to be …
On strain hardening mechanism in gradient nanostructures
Experiments have shown that a gradient design, in which grain size spans over four orders
of magnitude, can make strong nanomaterials ductile. This chapter presents a developed …
of magnitude, can make strong nanomaterials ductile. This chapter presents a developed …
Strain gradient plasticity-based modeling of hydrogen environment assisted cracking
Finite element analysis of stress about a blunt crack tip, emphasizing finite strain and
phenomenological and mechanism-based strain gradient plasticity (SGP) formulations, is …
phenomenological and mechanism-based strain gradient plasticity (SGP) formulations, is …
A cohesive zone framework for environmentally assisted fatigue
We present a compelling finite element framework to model hydrogen assisted fatigue by
means of a hydrogen-and cycle-dependent cohesive zone formulation. The model builds …
means of a hydrogen-and cycle-dependent cohesive zone formulation. The model builds …
Strain gradient plasticity modeling of hydrogen diffusion to the crack tip
In this work hydrogen diffusion towards the fracture process zone is examined accounting for
local hardening due to geometrically necessary dislocations (GNDs) by means of strain …
local hardening due to geometrically necessary dislocations (GNDs) by means of strain …
On elastic gaps in strain gradient plasticity: 3D discrete dislocation dynamics investigation
Although presenting attractive features in dealing with small-scale size effects, strain
gradient plasticity (SGP) theories can lead to uncommon phenomena for some boundary …
gradient plasticity (SGP) theories can lead to uncommon phenomena for some boundary …
Incremental strain gradient plasticity model and torsion simulation of copper micro-wires
Experimental observations show that the torsional deformation of copper micro-wires
exhibits obvious sample and grain size effects. In this work, based on the framework of the …
exhibits obvious sample and grain size effects. In this work, based on the framework of the …
On energetic and dissipative gradient effects within higher-order strain gradient plasticity: Size effect, passivation effect, and Bauschinger effect
F Hua, D Liu, Y Li, Y He, DJ Dunstan - International Journal of Plasticity, 2021 - Elsevier
The size effect, the passivation effect, and the plastic behavior under non-proportional
loading in the context of bending and tension of thin foils, and a combination of compression …
loading in the context of bending and tension of thin foils, and a combination of compression …
On the finite element implementation of higher-order gradient plasticity, with focus on theories based on plastic distortion incompatibility
A Panteghini, L Bardella - Computer Methods in Applied Mechanics and …, 2016 - Elsevier
We consider work-conjugate Gradient Plasticity (GP) theories involving both energetic and
dissipative higher-order contributions. We show that the conceptually most straightforward …
dissipative higher-order contributions. We show that the conceptually most straightforward …
Size and passivation effects in the torsion of thin metallic wires
Torsion tests are performed on microscale copper wires of diameters ranging from 25 to 50
μm, with and without passivation layers, to investigate the size and passivation effects. The …
μm, with and without passivation layers, to investigate the size and passivation effects. The …