| 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
Micromechanical modeling of unidirectional composites with uneven interfacial strengths
Abstract
Composite materials under loads normal to the fiber orientation often fail due to debonding between fibers and matrix. In this paper a micromechanical model is developed to study the interfacial and geometrical effects in fiber-reinforced composites using generalized plane strain by means of the finite element method. Assuming a periodic distribution of fibers in the matrix, a unit cell is chosen including two quarter-circular fibers. By using this unit cell approach the composite material is modeled rather realistically as the possibility of having different fiberematrix strength exists. In the present study two different cases are considered: I) Two perfectly bonded interfaces. II) Two debonding interfaces of uneven strength. The fibers are purely elastic while the matrix is considered as isotropic with an elastoplastic behavior. To model the fracture of the fiberematrix interfaces, a trapezoidal cohesive zone model is used. A parametric study is carried out to evaluate the influence of the interfacial properties, fiber position and fiber volume fraction on the overall stressestrain response as well as the end-crack opening displacement and the opening crack angle. All the results presented are compared with corresponding perfectly bonded interfaces. Generally, different crack initiations and propagations at the two interfaces are seen, which result in an overall stressestrain response of the material that often first depict a rather smooth stress drop followed by a second sudden stress drop. This behavior is shown to be very sensitive to interface parameters as well as geometrical parameters. The interfacial dissimilarity shows for all the investigations, that decreasing the maximum cohesive strength leads to more stable interfacial crack growth, whereas increasing the critical interfacial separation causes a less distinct debonding at one interface before debonding at the other.<br/>© 2013 Elsevier Masson SAS. All rights reserved