693.932 PEOPLE
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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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| 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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| Kočí, Jan | Prague |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Azevedo, Nuno Monteiro |
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| Rignanese, Gian-Marco |
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Fressengeas, Claude
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (34/34 displayed)
- 2024Complex patterning in jerky flow from time series analysis and numerical simulationcitations
- 2020Revisiting the Application of Field Dislocation and Disclination Mechanics to Grain Boundariescitations
- 2020Revisiting the Application of Field Dislocation and Disclination Mechanics to Grain Boundariescitations
- 2020A continuum model for slip transfer at grain boundaries ; Un modèle continue pour le transfert de glissement aux joints de grainscitations
- 2019Crystal plasticity modeling of the effects of crystal orientation and grain-to-grain interactions on DSA-induced strain localization in Al–Li alloyscitations
- 2019Crystal plasticity modeling of the effects of crystal orientation and grain-to-grain interactions on DSA-induced strain localization in Al–Li alloyscitations
- 2019Spatiotemporal correlations in the Portevin-Le Chatelier band dynamics during the type B - type C transitioncitations
- 2018Geometrically Nonlinear Field Fracture Mechanics and Crack Nucleation, Application to Strain Localization Fields in Al-Cu-Li Aerospace Alloyscitations
- 2018Geometrically Nonlinear Field Fracture Mechanics and Crack Nucleation, Application to Strain Localization Fields in Al-Cu-Li Aerospace Alloyscitations
- 2017On the strain rate dependence of the critical strain for plastic instabilities in Al-Mg alloyscitations
- 2017Interactions between cracks and dislocations in Al-Cu-Li alloys in presence of dynamic strain aging
- 2016Continuous Modeling of Dislocation Cores Using a Mechanical Theory of Dislocation Fields
- 2016Building compact dislocation cores in an elasto-plastic model of dislocation fieldscitations
- 2016Building compact dislocation cores in an elasto-plastic model of dislocation fieldscitations
- 2016A higher order elasto-viscoplastic model using fast Fourier transforms: Effects of lattice curvatures on mechanical response of nanocrystalline metalscitations
- 2016A higher order elasto-viscoplastic model using fast Fourier transforms: Effects of lattice curvatures on mechanical response of nanocrystalline metalscitations
- 2016A field theory of strain/curvature incompatibility for coupled fracture and plasticitycitations
- 2016A field theory of strain/curvature incompatibility for coupled fracture and plasticitycitations
- 2016Continuous description of a grain boundary in forsterite from atomic scale simulations: the role of disclinations Continuous description of a grain boundary in forsterite from atomic scale simulations: the role of disclinationscitations
- 2016Continuous description of a grain boundary in forsterite from atomic scale simulations: the role of disclinations Continuous description of a grain boundary in forsterite from atomic scale simulations: the role of disclinationscitations
- 2016Effects of grain-to-grain interactions on hear strain localization in Al-Cu-Li rolled sheetscitations
- 2016Effects of grain-to-grain interactions on hear strain localization in Al-Cu-Li rolled sheetscitations
- 2015A mesoscopic theory of dislocation and disclination fields for grain boundary-mediated crystal plasticitycitations
- 2015A mesoscopic theory of dislocation and disclination fields for grain boundary-mediated crystal plasticitycitations
- 2015On the effects of the Mg content on the critical strain for the jerky flow of Al–Mg alloyscitations
- 2014A field theory of distortion incompatibility for coupled fracture and plasticitycitations
- 2014A field theory of distortion incompatibility for coupled fracture and plasticitycitations
- 2013Elastic constitutive laws for incompatible crystalline media: the contributions of dislocations, disclinations and G-disclinationscitations
- 2013Elastic constitutive laws for incompatible crystalline media: the contributions of dislocations, disclinations and G-disclinationscitations
- 2011Grain boundary and triple junction energies in crystalline media: A disclination based approachcitations
- 2010Surface Damage and Treatment by Impact of a Low Temperature Nitrogen Jetcitations
- 2008Rearrangement of dislocation structures in the aging of ice single crystalscitations
- 2008Rearrangement of dislocation structures in the aging of ice single crystalscitations
- 2007Evidence for universal intermittent crystal plasticity from acoustic emission and high-resolution extensometry experimentscitations
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article
Rearrangement of dislocation structures in the aging of ice single crystals
Abstract
Aging of ice single crystals subjected to creep exhibits peculiar behavior. If the sample is unloaded after sufficient strain, a forward jump in creep rate is observed at reloading. Sequences of loading periods alternated with either increasing or decreasing unloading intervals were performed to document this phenomenon. During the tests, acoustic emission was recorded in order to characterize dislocation activity and spatial distribution. Predictions obtained from a field dislocation theory coupling the evolution of statistical and polar dislocation densities compare fairly well with experimental results. Polar dislocation density reflects lattice incompatibility and long-range internal stresses. The associated back-stress and its relaxation during aging are seen as the origin of the acceleration effect. The interplay between dislocation velocity enhancement and polar dislocation annihilation during aging controls the phenomenon, whereas statistical dislocations only play a minor role. The reverse relaxation deformation observed during unloading periods is reproduced well by the model.