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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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Lee, H.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2024Evidence of non-isentropic release from high residual temperatures in shocked metals measured with ultrafast x-ray diffractioncitations
- 2023Compressive effects in melting of palladium thin films studied by ultrafast x-ray diffraction
- 2023Structure-sensitive epoxidation of dicyclopentadiene over TiO 2 catalystscitations
- 2022Multiscale modelling framework for elasticity of ultra high strength concrete using nano/microscale characterization and finite element representative volume element analysiscitations
- 2022Magnetoresponsive Optical Fiber with Fuse-Effect-Induced Fluorinated Graphene Oxide Corecitations
- 2021Label-free detection of single nanoparticles with disordered nanoisland surface plasmon sensor.citations
- 2021Observation of Fundamental Mechanisms in Compression-Induced Phase Transformations Using Ultrafast X-ray Diffractioncitations
- 2021In-plane quasi-single-domain BaTiO<sub>3</sub> via interfacial symmetry engineeringcitations
- 2018In situ X-ray diffraction measurement of shock-wave-driven twinning and lattice dynamicscitations
- 2016Studies on the active site of deacetoxycephalosporin C synthase.citations
- 2015Positive reactions to nickel on a patch test do not predict clinical outcome of nickel alloy-based atrial septal defect occluder implantationcitations
- 2014Spectral theory of a Neumann-Poincaré-type operator and analysis of cloaking by anomalous localized resonance IIcitations
- 2014Spectral theory of a Neumann-Poincaré-type operator and analysis of cloaking by anomalous localized resonance II
- 2011The effect of vacancies on the annular dark field image contrast of grain boundaries: A SrTiO(3) case studycitations
- 2008Thermal expansivity of tetrahydrofuran clathrate hydrate with diatomic guest moleculescitations
- 2006Dynamics in polymer-silicate nanocomposites as studied by dielectric relaxation spectroscopy and dynamic mechanical spectroscopycitations
Places of action
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article
Multiscale modelling framework for elasticity of ultra high strength concrete using nano/microscale characterization and finite element representative volume element analysis
Abstract
<p>Ultra-High Strength Concrete (UHSC) (greater than 100 MPa) is a mechanically superior material compared with the Normal Strength Concrete (NSC) due to its inherent performance characteristics. Improved modulus of elasticity is one of the key target characteristics in the development of UHSC. Macroscopic response of UHSC is a result of a multitude of phases in different spatial length scales such as mesoscale, microscale, nanoscale etc. and investigating these spatial scales can yield a better understanding about contribution of each heterogenous phases to the macroscopic behaviour of UHSC. In this paper, a new multiscale modelling method including procedures to obtain micro/nano scale properties is proposed to predict the macroscopic elastic modulus using nanoindentation experiments, hydration simulations, Scanning Electron Microscopy (SEM) and Finite Element Representative Volume Element (FE-RVE) modelling. <br/></p><p>Characterization of nanomechanical properties of the cementitious composite was carried out using nanoindentation, microstructural characterization was performed using scanning electron microscopy, and hydration simulation of the cementitious paste was carried out using Virtual Cement and Concrete Testing Laboratory (VCCTL) software. A five-level multiscale framework is proposed for UHSC and results from these experimental testing and simulations were used as inputs in the proposed framework. <br/></p><p>A novel algorithm which can model any volume fraction of different phases was developed to generate geometries for RVEs to be used in FE-RVE simulations. Upscaling of elastic modulus using FE-RVE was found to be very accurate, and this method can generate detailed variation of microfields inside the RVE. A parametric study was carried out on how varying inhomogeneities in the RVE, boundary conditions, and the shape of the inhomogeneities would affect the homogenized elastic modulus. <br/></p><p>Continuum micromechanics models such as Mori-Tanaka method and Self Consistent Scheme were used for the analytical homogenization at each scale for comparison with FE-RVE method. The results of the proposed FE-RVE analysis, the Mean Field Homogenization (MFH) method, and experiment were compared and found to be a very good fit.</p>