| 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
On the effect of microplasticity on crack initiation from subsurface defects in rolling contact fatigue
Abstract
This work demonstrates numerically how microplasticity, i.e. the yielding behavior below the conventional 0.2% plastic strain threshold, can lead to initiation of cracks at subsurface defects, in rolling contact applications operating under realistic loads. A 3D elasto-plastic finite element model is employed to perform shakedown analysis of the bearing steel around a small spherical void with two different approximations of the steel constitutive behavior at the plastic micro-strain regime. When non-linear kinematic hardening is used to model a fast but smooth onset of plasticity, the fields of plastic strains and micro-residual stresses around the void evolve very distinctly to the case where a sharp transition is assumed. To further investigate the role of the tensile micro-residual stresses occurring in the former case on crack initiation, a planar circular crack is inserted at the equator of the void and an entire overrolling cycle is investigated by means of linear elastic fracture mechanics (LEFM). This analysis is repeated for different crack sizes and the respective stress intensity factors and their amplitudes, relevant for crack growth, are reported. The work also reports implementation details for the coupling of a 3D elasto-plastic model for shakedown analysis to a subsequent LEFM analysis model.