Results 1 to 10 of about 1,849,278 (326)

Gradient plasticity in gradient nano-grained metals [PDF]

Extreme Mechanics Letters, 2016
Gradient nano-grained (GNG) metals are a unique class of materials with spatial gradients in grain size, typically from the surface to the bulk. Here the gradient mechanical behavior in GNG copper is studied by a crystal plasticity finite element model that accounts for grain-size-dependent yield strengths.
Zhi Zeng, Xiaoyan Li, Dongsheng Xu, Lei Lu, Huajian Gao, Ting Zhu   +5 more
semanticscholar   +4 more sources

A potential for higher-order phenomenological strain gradient plasticity to predict reliable response under non-proportional loading. [PDF]

Proc Math Phys Eng Sci, 2019
We propose a plastic potential for higher-order (HO) phenomenological strain gradient plasticity (SGP), predicting reliable size-dependent response for general loading histories.
Panteghini A, Bardella L, Niordson CF.
europepmc   +2 more sources

Stress-gradient plasticity. [PDF]

Proc Natl Acad Sci U S A, 2011
A new model, stress-gradient plasticity, is presented that provides unique mechanistic insight into size-dependent phenomena in plasticity. This dislocation-based model predicts strengthening of materials when a gradient in stress acts over dislocation source–obstacle configurations.
Chakravarthy SS, Curtin WA.
europepmc   +4 more sources

Mode I crack tip fields: strain gradient plasticity theory versus J2 flow theory [PDF]

European Journal of Mechanics - A/Solids, 2019
The mode I crack tip asymptotic response of a solid characterised by strain gradient plasticity is investigated. It is found that elastic strains dominate plastic strains near the crack tip, and thus the Cauchy stress and the strain state are given ...
Fleck, Norman A., Martínez-Pañeda, Emilio   +1 more
core   +2 more sources

Gradient nanostructured steel with superior tensile plasticity

Science Advances, 2023
Nanostructured metallic materials with abundant high-angle grain boundaries exhibit high strength and good radiation resistance. While the nanoscale grains induce high strength, they also degrade tensile ductility. We show that a gradient nanostructured ferritic steel exhibits simultaneous improvement in yield strength by 36% and uniform elongation by ...
Zhongxia Shang, Tianyi Sun, Jie Ding, Nicholas A. Richter, Nathan M. Heckman, Benjamin C. White, Brad L. Boyce, Khalid Hattar, Haiyan Wang, Xinghang Zhang   +9 more
openaire   +5 more sources

Fracture in distortion gradient plasticity [PDF]

International Journal of Engineering Science, 2020
In this work, distortion gradient plasticity is used to gain insight into material deformation ahead of a crack tip. This also constitutes the first fracture mechanics analysis of gradient plasticity theories adopting Nye's tensor as primal kinematic variable. First, the asymptotic nature of crack tip fields is analytically investigated.
Fuentes-Alonso, S, Martínez-Pañeda, E
openaire   +7 more sources

Strength-plasticity synergy from ambient to high temperature via gradient-ordering in boride-reinforced WTaV medium-entropy alloy [PDF]

Nature Communications
Developing next-generation hypersonic vehicles necessitates structural materials capable of withstanding extreme thermal gradients. However, conventional alloys usually sacrifice room-temperature plasticity for breakthroughs in high-temperature strength.
Bo Sun, Bingjie Wang, Zhe Jia, Ligang Sun, Juan Kuang, Qianqian Wang, Gang Sha, Xiubing Liang, Baolong Shen   +8 more
doaj   +2 more sources

Reward-optimizing learning using stochastic release plasticity [PDF]

Frontiers in Neural Circuits
Synaptic plasticity underlies adaptive learning in neural systems, offering a biologically plausible framework for reward-driven learning. However, a question remains: how can plasticity rules achieve robustness and effectiveness comparable to error ...
Yuhao Sun, Yuhao Sun, Wantong Liao, Wantong Liao, Jinhao Li, Jinhao Li, Xinche Zhang, Xinche Zhang, Guan Wang, Guan Wang, Zhiyuan Ma, Zhiyuan Ma, Zhiyuan Ma, Sen Song, Sen Song   +14 more
doaj   +2 more sources

Contact of Rough Surfaces: An Incremental Model Accounting for Strain Gradient Plasticity

Lubricants, 2023
In the contact of rough surfaces, most contact patches are at the scale of micrometers, and thus, their contact deformation can be dominated by the size-dependent plasticity. In this paper, we propose a new strategy to analyze the role of strain gradient
Chunyun Jiang, Weike Yuan, Yanbin Zheng, Gangfeng Wang   +3 more
doaj   +1 more source

Simulation of Lueders bands using regularized large strain elasto-plasticity

Archives of Mechanics, 2021
This paper deals with the numerical simulation of an instability phenomenon called Lueders bands with two regularized material models: viscoplasticity and gradient-enhanced plasticity.
M. Mucha, B. Wcisło, J. Pamin
doaj   +1 more source