Results 21 to 30 of about 27,476 (261)
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 ...
Aifantis, K.E. +3 more
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Strain Gradient Plasticity Applied to Material Cutting [PDF]
Advanced Materials Research, 2011 To better understand the complex phenomena involved in the cutting process is to better qualify the behaviour law used in the simulatiotrn of machining processes (analytical and finite element modeling). The aim of this paper is to present the choices made regarding the behaviour law in this context, indeed, commonly used behaviour laws such as Jonhson-
Royer, Raphaël +2 more
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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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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
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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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Numerical simulations of strain localization for large strain damage-plasticity model [PDF]
Computer Methods in Materials Science, 2013 This paper deals with the phenomenon of strain localization in nonlinear and nonlocal material models. Particularly, in the description of the material not only nonlinear constitutive relations (damage, plasticity) are included, but also geometrical ...
Balbina Wcisło, Jerzy Pamin
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Results in Engineering, 2023 Based on the structure of natural nacres, laminated metal materials have been successfully developed to possess desirable mechanical properties for diverse engineering applications.
Xiaochong Lu +5 more
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Torsion in Strain-Gradient Plasticity: Energetic Scale Effects [PDF]
SIAM Journal on Applied Mathematics, 2012 We study elasto-plastic torsion in a thin wire within the framework of the strain-gradient plasticity theory elaborated by Gurtin and Anand in 2005. The theory in question envisages two material scales: an energetic length-scale, which takes into account the so-called “geometrically-necessary dislocations” through a dependence of the free energy on the
CHIRICOTTO, MARIA +2 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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Simulation of instabilities in non-softening Drucker-Prager plasticity
Computer Assisted Methods in Engineering and Science, 2023 The problem of instability and strain localization in a hardening non-associative Drucker-Prager plasticity theory is analyzed. The classical and gradient-enhanced versions of the theory are reviewed and instability indicators are summarized.
Anna Stankiewicz, Jerzy Pamin
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