Session Details
MS14-1: Multiscale Modeling of Transport Processes and Fracture in Concrete (Ganzes Minisymposium anzeigen)
Thursday, 12. October 2017; 10:30 - 12:30 Uhr in Raum 7.11
Sitzungsleitung: Tao Wu
10:30
A Bayesian approach to parameter identification for phase-field modeling fracture (Keynote)
Tao Wu (Technical University of Braunschweig), Bojana Rosić (Technical University of Braunschweig), Hermann Matthies (Technical University of Braunschweig), Laura De Lorenzis (Technical University of Braunschweig)
Kurzfassung:
Phase-field modeling is capable of simulating complicated fracture processes in a unified framework without the need for ad-hoc criteria and on a fixed mesh. The objective of this work is to apply the probabilistic analysis through a Bayesian approach to provide an efficient and reliable parameter identification for phase-field modeling of fracture.
A Bayesian approach to parameter identification for phase-field modeling fracture (Keynote)
Tao Wu (Technical University of Braunschweig), Bojana Rosić (Technical University of Braunschweig), Hermann Matthies (Technical University of Braunschweig), Laura De Lorenzis (Technical University of Braunschweig)
Kurzfassung:
Phase-field modeling is capable of simulating complicated fracture processes in a unified framework without the need for ad-hoc criteria and on a fixed mesh. The objective of this work is to apply the probabilistic analysis through a Bayesian approach to provide an efficient and reliable parameter identification for phase-field modeling of fracture.
11:10
Transport properties of microcracked porous materials: Micromechanics models and mesoscale simulations
Jithender Jaswant Timothy (Ruhr University Bochum), Tagir Iskhakov (Ruhr University Bochum), Günther Meschke (Ruhr University Bochum)
Kurzfassung:
In the presentation, using a combination of analytical micromechanics models and direct numerical simulations, the effective diffusivity of microcracked porous REVs for various isotropic and anisotropic microcrack configurations are investigated. Furthermore, the level of applied external loading on the effective diffusivity of a fracturing material is simulated by an element-erosion based mesoscale pixel-FE model for fracture coupled with diffusion using selected numerical experiments.
Transport properties of microcracked porous materials: Micromechanics models and mesoscale simulations
Jithender Jaswant Timothy (Ruhr University Bochum), Tagir Iskhakov (Ruhr University Bochum), Günther Meschke (Ruhr University Bochum)
Kurzfassung:
In the presentation, using a combination of analytical micromechanics models and direct numerical simulations, the effective diffusivity of microcracked porous REVs for various isotropic and anisotropic microcrack configurations are investigated. Furthermore, the level of applied external loading on the effective diffusivity of a fracturing material is simulated by an element-erosion based mesoscale pixel-FE model for fracture coupled with diffusion using selected numerical experiments.
11:30
Multiscale model of ASR-induced damage in concrete
Tagir Iskhakov (Ruhr University Bochum), Jithender Jaswant Timothy (Ruhr University Bochum), Günther Meschke (Ruhr University Bochum)
Kurzfassung:
A multiscale micromechanical model for the prediction of the deterioration of concrete caused by Alkali Silica Reaction is presented. The gel pressure results in microcrack growth in the reactive aggregate and the surrounding cement paste. This damage process is formulated in the framework of linear elastic fracture mechanics applied at the scale of the aggregate and the cement paste. The model predictions are compared with selected experimental data.
Multiscale model of ASR-induced damage in concrete
Tagir Iskhakov (Ruhr University Bochum), Jithender Jaswant Timothy (Ruhr University Bochum), Günther Meschke (Ruhr University Bochum)
Kurzfassung:
A multiscale micromechanical model for the prediction of the deterioration of concrete caused by Alkali Silica Reaction is presented. The gel pressure results in microcrack growth in the reactive aggregate and the surrounding cement paste. This damage process is formulated in the framework of linear elastic fracture mechanics applied at the scale of the aggregate and the cement paste. The model predictions are compared with selected experimental data.
11:50
A Lattice Boltzmann approach for advection-diffusion problems in porous media including dissolution
Hussein Alihussein (Technical University of Braunschweig), Manfred Krafczyk (Technical University of Braunschweig), Konstantin Kutscher (Technical University of Braunschweig), Martin Geier (Technical University of Braunschweig)
Kurzfassung:
A LB model is presented to simulate advection-diffusion processes in porous media. Chemical reactions occurring on the pore surfaces causing dissolution require continuous surface adaptation. The approach utilizes the Cumulant LB model to model advection, a second LBM for the concentration of the chemical species, and an explicit surface dynamics solver governing the transient evolution of the surface geometry.
A Lattice Boltzmann approach for advection-diffusion problems in porous media including dissolution
Hussein Alihussein (Technical University of Braunschweig), Manfred Krafczyk (Technical University of Braunschweig), Konstantin Kutscher (Technical University of Braunschweig), Martin Geier (Technical University of Braunschweig)
Kurzfassung:
A LB model is presented to simulate advection-diffusion processes in porous media. Chemical reactions occurring on the pore surfaces causing dissolution require continuous surface adaptation. The approach utilizes the Cumulant LB model to model advection, a second LBM for the concentration of the chemical species, and an explicit surface dynamics solver governing the transient evolution of the surface geometry.