Results 1 to 10 of about 857 (117)
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.
Ting Zhu, Xiaoyan Li, Huajian Gao
exaly +2 more sources
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
Simulation of propagative instability in shear using gradient-enhanced and viscoplastic model [PDF]
Computer Methods in Materials Science, 2019 The research presented in this paper is focused on simulation of a propagative instability called Lueders bands using large strain plasticity with Huber-Mises-Hencky yield function.
Marzena Mucha +2 more
doaj +1 more source
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 +3 more
doaj +1 more source
Stress-gradient plasticity [PDF]
Proceedings of the National Academy of Sciences, 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, S. S., Curtin, W. A.
openaire +3 more sources
A reformulation of strain gradient plasticity [PDF]
Journal of the Mechanics and Physics of Solids, 2001 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Fleck, N. A., Hutchinson, J. W.
openaire +2 more sources
Atomistic simulations of plasticity heterogeneity in gradient nano-grained FCC metals
Materials & Design, 2022 Gradient nano-grained (GNG) metals are an emerging class of heterogeneous structured materials with extraordinary mechanistic performances and unnatural plasticity mechanisms, which are unachievable in traditional homogeneous nanocrystalline metals. Here,
Like Xu +3 more
doaj +1 more source
Natural-gradient learning for spiking neurons
eLife, 2022 In many normative theories of synaptic plasticity, weight updates implicitly depend on the chosen parametrization of the weights. This problem relates, for example, to neuronal morphology: synapses which are functionally equivalent in terms of their ...
Elena Kreutzer +2 more
doaj +1 more source
A Comparison of Plasticity Regularization Approaches for Geodynamic Modeling
Geochemistry, Geophysics, Geosystems, 2023 The emergence, geometry and activation of faults are intrinsically linked to frictional rheology. The latter is thus a central element in geodynamic simulations which aim at modeling the generation and evolution of fault zones and plate boundaries ...
Thibault Duretz +3 more
doaj +1 more source
Archives of Mechanics, 2019 In crystal plasticity under prescribed deformation, the incremental material response is potentially non-unique owing to slip system redundancy for most of the crystalline structures.
J.L. Dequiedt
doaj +1 more source