Results 21 to 30 of about 29,135 (304)
A critical assessment of theories of strain gradient plasticity [PDF]
Acta Materialia, 2009 Theories to extend plasticity to the micron scale have been in existence for over a decade, complemented by a growing body of experimental data. Here, materials and mechanics aspects of two prominent strain gradient theories of plasticity, due to Nix and Gao and to Fleck and Hutchinson, are assessed within the context of simple bending.
Evans, Anthony G., Hutchinson, John
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On the application of strain gradient crystal plasticity to study strain localization phenomena in single crystals [PDF]
, 2021 Strain localization is an important plastic instability process occurring prior to fracture. It is usually observed in the form of narrow bands of intense plastic shear strain in deformed bodies undergoing severe inhomogeneous deformation.
CAI, Lei +2 more
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Strain gradient polycrystal plasticity for micro-forming [PDF]
AIP Conference Proceedings, 2016 The developments in the micro-device industry has produced a substantial demand for the miniaturized metallic components with ultra-thin sheet materials that have thickness dimensions on the order of 50-500 µm which are produced through micro-forming processes.
Yalcinkaya, Tuncay +2 more
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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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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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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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Plasticity size effects in tension and compression of single crystals [PDF]
, 2005 The effect of size and loading conditions on the tension and compression stress–strain response of micron-sized planar crystals is investigated using discrete dislocation plasticity.
Deshpande, V.S., +6 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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