| 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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Nielsen, Kl
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (42/42 displayed)
- 2024A micro-mechanics based extension of the GTN continuum model accounting for random void distributionscitations
- 2024Steady-state fracture toughness of elastic-plastic solids: isotropic versus kinematic hardeningcitations
- 2023A micro-mechanics based extension of the GTN continuum model accounting for random void distributionscitations
- 2022Dynamic size effects across the scales
- 2022Gradient strengthening effects in mode I tearing of ductile plate at the engineering scale
- 2022Plastic buckling of columns at the micron scalecitations
- 2021Computational rate-independent strain gradient crystal plasticitycitations
- 2020Cohesive traction–separation relations for tearing of ductile plates with randomly distributed void nucleation sitescitations
- 2020Fundamental differences between plane strain bending and far-field plane strain tension in ductile plate failurecitations
- 2019Investigation of a gradient enriched Gurson-Tvergaard model for porous strain hardening materialscitations
- 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
- 2019Experimental Investigation of Crack Propagation Mechanisms in Commercially Pure Aluminium Platescitations
- 2019Effect of damage-related microstructural parameters on plate tearing at steady statecitations
- 2019A numerical framework for rate-independent for Fleck and Willis crystal plasticity
- 2019Parameter window for assisted crack tip flipping: Studied by a shear extended Gurson modelcitations
- 2019Micro-mechanics based cohesive zone modeling of full scale ductile plate tearing: From initiation to steady-statecitations
- 2019Grain-size affected mechanical response and deformation behavior in microscale reverse extrusioncitations
- 2018Steady-state fracture toughness of elastic-plastic solids: Isotropic versus kinematic hardeningcitations
- 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
- 2017Crack Tip Flipping under Mode I Tearing: Investigated by X-Ray Tomographycitations
- 2016Crack Tip Flipping Under Mode I/III Tearing
- 2016Attaining the rate-independent limit of a rate-dependent strain gradient plasticity theorycitations
- 2016On modeling micro-structural evolution using a higher order strain gradient continuum theorycitations
- 2016Rolling at small scalescitations
- 2015Rolling induced size effects in elastic–viscoplastic sheet metalscitations
- 2015Strain gradient crystal plasticity: A continuum mechanics approach to modeling micro-structural evolution
- 2013Observations on Mode I ductile tearing in sheet metalscitations
- 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
- 2011Failure by void coalescence in metallic materials containing primary and secondary voids subject to intense shearingcitations
- 2010Strain hardening and damage in 6xxx series aluminum alloy friction stir weldscitations
- 2010Predicting failure response of spot welded joints using recent extensions to the Gurson modelcitations
- 2010Ductile shear failure or plug failure of spot welds modelled by modified Gurson modelcitations
- 2010Modelling of plastic flow localization and damage development in friction stir welded 6005A aluminium alloy using physics based strain hardening lawcitations
- 2010Modelling of damage development and ductile failure in welded joints
- 2009Effect of a shear modified Gurson model on damage development in a FSW tensile specimencitations
- 2008Ductile damage development in friction stir welded aluminum (AA2024) jointscitations
- 2008Ductile Damage Development in Friction Stir Welded Aluminumjoints
- 2007Ductile Damage Development in Friction Stir Welded Aluminum Joints
Places of action
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thesis
Modelling of damage development and ductile failure in welded joints
Abstract
This thesis focuses on numerical analysis of damage development and ductile failure in welded joints. Two types of welds are investigated here. First, a study of the localization of plastic flow and failure in aluminum sheets, welded by the relatively new Friction Stir (FS) Welding method, has been conducted ([P1], [P2], [P7]-[P9]). The focus in the thesis is on FS-welded 2xxx and 6xxx series of aluminum alloys, which are attractive, for example, to the aerospace industry, since the 2024 aluminum in particular, is typically classified as un-weldable by conventional fusion welding techniques. Secondly, a study of the damage development in Resistance SpotWelded joints, when subject to the commonly used static shear-lab or cross-tension testing techniques, has been carried out ([P3]-[P6]). The focus in thesis is on the Advanced High Strength Steels, Dual-Phase 600, which is used in for example, the automotive industry due to its good mechanical properties. Both welding techniques are known to result in a significant change of the microstructure in the weld region. Thus, some experimental investigations have been conducted to estimate the variation of the model parameters across the weld as well as to obtain experimental measurements for comparison with the developed models ([P3], [P7]-[P9]). However, the main focus in this thesis is on modelling the large material deformation in the weld region that eventually leads to ductile failure, as loading is applied. All numerical models developed in this thesis are based on the classical micromechanical Gurson model (Gurson-Tvergaard-Needleman model), which approximates the ductile failure mechanism by nucleation, growth and coalescence of spherical micro-voids through a set of constitutive equations. Extensions to this classical model that account for the void shape evolution (the Gologanu-Leblond-Devaux model) and failure during low triaxiality shearing (the Nahshon-Hutchinson shear modification) have also been applied to predict failure in welded joints.