Results 41 to 50 of about 235,245 (284)
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
A gradient plasticity model for the simulation of shear localization
Advances in Mechanical Engineering, 2017 The numerical simulation of shear localization under high strain rates can be modeled by a system of four partial differential equations including conservation of momentum, conservation of energy, elastic, and inelastic constitutive relations.
Xiaocui Chen, Chengbin Du
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Establishment of damage estimation rule for brittle fracture after cyclic plastic prestrain in steel [PDF]
MATEC Web of Conferences, 2019 Material damage caused by complicated prestrain like cyclic prestrain and various direction prestrain. It is so important to understand the mechanism of material damage for high-precision lifetime evaluation of steel structure. Material damage depends on
Kosuge Hiroaki +4 more
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A thermodynamically consistent theory of stress-gradient plasticity [PDF]
, 2020 As an extension to strain-gradient models of size-dependent plastic behaviour, this work proposes a model for a stress-gradient theory. The model is distinguished from earlier works on the topic by its being embedded in a thermodynamically consistent framework.
arxiv +1 more source
Journal of the Mechanical Behavior of Materials, 2016 The gradient plasticity theory proposed by Aifantis and coworkers has been successfully used to model size effect phenomena at the microscale and nanoscale, by introducing into the formulation an internal length scale associated with the phenomenological
Wei Xiaokun +3 more
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A Brief Note on the Nix–Gao Strain Gradient Plasticity Theory
Metals, 2018 The mathematical nature of the flow rule for the strain gradient plasticity theory proposed by Nix and Gao (W.D. Nix and H. Gao, J Mech Phys Solids 46(3), 411(1998)) is discussed based on the paradigm developed by Gurtin and Anand (M.E.
A. S. Borokinni, Dabiao Liu
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Constitutive Model of Thin Metal Sheet in Bulging Test Considering Strain Gradient Hardening
Medžiagotyra, 2020 The study of the size effect was one of the most important subjects in the field of micro-forming. To investigate the stress of the thin sheet in the bulging test with the second order size effect, a constitutive equation considering the strain gradient ...
Wei LIANG, Tieping WEI, Xiaoxiang YANG
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A rate-independent model for geomaterials under compression coupling strain gradient plasticity and damage [PDF]
arXiv, 2023 We study a strain gradient-enhanced version of a model for geomaterials under compression by Marigo and Kazymyrenko (2019) coupling damage and small-strain associative plasticity. We prove that the jumps in time of the plastic variable may happen only along jumps of the damage variable.
arxiv
, 2005 A Phenomenological Mesoscopic Field Dislocation Mechanics (PMFDM) model is developed, extending continuum plasticity theory for studying initial-boundary value problems of small-scale plasticity.
Acharya, Amit, Roy, Anish
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A mechanism-based gradient damage model for metallic fracture [PDF]
Engineering Fracture Mechanics (2021), 2021 A new gradient-based formulation for predicting fracture in elastic-plastic solids is presented. Damage is captured by means of a phase field model that considers both the elastic and plastic works as driving forces for fracture. Material deformation is characterised by a mechanism-based strain gradient constitutive model. This non-local plastic-damage
arxiv