| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Niordson, Christian Frithiof
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (52/52 displayed)
- 2024A micro-mechanics based extension of the GTN continuum model accounting for random void distributionscitations
- 2022Uniaxial tensile behaviour of additively manufactured elastically isotropic truss lattices made of 316Lcitations
- 2022Anisotropic yield surfaces of additively manufactured metals simulated with crystal plasticitycitations
- 2022A special finite element method applied to off-axis tunnel cracking in laminatescitations
- 2022Phase field modelling of hydrogen-assisted fatigue
- 2022An efficient stiffness degradation model for layered composites with arbitrarily oriented tunneling and delamination crackscitations
- 2022On the effect of microplasticity on crack initiation from subsurface defects in rolling contact fatiguecitations
- 2021Anisotropic tensile behaviour of additively manufactured Ti-6Al-4V simulated with crystal plasticitycitations
- 2021Finite element study of cyclic plasticity near a subsurface inclusion under rolling contact and macro-residual stressescitations
- 2020Effect of superimposed compressive stresses on rolling contact fatigue initiation at hard and soft inclusionscitations
- 2020Tunneling cracks in arbitrary oriented off-axis laminacitations
- 2019Investigation of a gradient enriched Gurson-Tvergaard model for porous strain hardening materialscitations
- 2019The role of plastic strain gradients in the crack growth resistance of metalscitations
- 2019An investigation of back stress formulations under cyclic loadingcitations
- 2019Finite strain analysis of size effects in wedge indentation into a Face-Centered Cubic (FCC) single crystalcitations
- 2019Determination of optimal residual stress profiles for improved rolling contact fatigue resistancecitations
- 2018A homogenization method for ductile-brittle composite laminates at large deformationscitations
- 2018A novel numerical framework for self-similarity in plasticity: Wedge indentation in single crystalscitations
- 2018Hardening and strengthening behavior in rate-independent strain gradient crystal plasticitycitations
- 2017An incremental flow theory for crystal plasticity incorporating strain gradient effectscitations
- 2017Linking Scales in Plastic Deformation and Fracture
- 2016Attaining the rate-independent limit of a rate-dependent strain gradient plasticity theorycitations
- 2016Strain gradient plasticity modeling of hydrogen diffusion to the crack tipcitations
- 2016Strain gradient plasticity-based modeling of hydrogen environment assisted crackingcitations
- 2016On modeling micro-structural evolution using a higher order strain gradient continuum theorycitations
- 2016Homogenization of long fiber reinforced composites including fiber bending effectscitations
- 2016Rolling at small scalescitations
- 2015Strain gradient crystal plasticity: A continuum mechanics approach to modeling micro-structural evolution
- 2015Accounting for Fiber Bending Effects in Homogenization of Long Fiber Reinforced Composites
- 2014On the homogenization of metal matrix composites using strain gradient plasticitycitations
- 2014Computational strain gradient crystal plasticitycitations
- 2013Length-scale effect due to periodic variation of geometrically necessary dislocation densitiescitations
- 2013A deformation mechanism map for polycrystals modeled using strain gradient plasticity and interfaces that slide and separatecitations
- 2013Micromechanical modeling of unidirectional composites with uneven interfacial strengthscitations
- 2013Micromechanical modeling of unidirectional composites with uneven interfacial strengthscitations
- 2013A new macroscopically anisotropic pressure dependent yield function for metal matrix composite based on strain gradient plasticity for the microstructurecitations
- 2013On modeling of geometrically necessary dislocation densities in plastically deformed single crystals
- 2012Rate sensitivity of mixed mode interface toughness of dissimilar metallic materials: Studied at steady statecitations
- 2012Strain gradient effects on steady state crack growth in rate-sensitive materialscitations
- 2011Size-effects on yield surfaces for micro reinforced compositescitations
- 2010Debonding failure and size effects in micro reinforced compositescitations
- 2008Plasticity size effects in voided crystalscitations
- 2008Void growth to coalescence in a non-local materialcitations
- 2008Size effects on void growth in single crystals with distributed voidscitations
- 2006Plasticity size effects in voided crystals
- 2006Void growth to coalescence in a non-local material
- 2003Strain gradient plasticity effects in whisker-reinforced metalscitations
- 2002Non-local modeling of materials
- 2002Non-local plasticity effects on fracture toughness
- 2002Nonlocal plasticity effects on fibre debonding in a whisker-reinforced metal
- 2002Strain gradient plasticity effects in whisker-reinforced metals
- 2001Non-local plasticity effects on the tensile properties of a metal matrix composite
Places of action
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article
Hardening and strengthening behavior in rate-independent strain gradient crystal plasticity
Abstract
Two rate-independent strain gradient crystal plasticity models, one new and one previously published, are compared and a numerical framework that encompasses both is developed. The model previously published is briefly outlined, while an in-depth description is given for the new, yet somewhat related,model. The difference between the two models is found in the definitions of the plastic work expended in the material and their relation to spatial gradients of plastic strains. The model predictions are highly relevant to the ongoing discussion in the literature, concerning 1) what governs the increase in the apparent yield stress due to strain gradients (also referred to as strengthening)? And 2), what is the implication of such strengthening in relation to crystalline material behavior at the micron scale? The present work characterizes material behavior, and the corresponding plastic slip evolution, by use of the finite element method. The pure shear problem of an infinite material slab is investigated, with the previously published model displaying strengthening, while the new model does not. In addition to the numerical approach an exact closed form solution, to the pure shear problem, is obtained for the new model, and it is demonstrated that the model predicts proportional straining in the entire plastic regime. Somewhat surprising it is found that the predictions for strain gradient hardening coincide for the two models.