Session Details
MS09-1: Damage Mechanics and Numerical Applications (Ganzes Minisymposium anzeigen)
Wednesday, 11. October 2017; 10:30 - 12:30 Uhr in Raum 7.11
Sitzungsleitung: Jaan-Willem Simon
10:30
Phase Field Modeling of Fracture in Anisotropic Brittle Solids (Keynote)
Stephan Teichtmeister (University of Stuttgart), Daniel Kienle (University of Stuttgart), Fadi Aldakheel (Leibniz Universität Hannover), Marc-André Keip (University of Stuttgart)
Kurzfassung:
A phase field model of fracture that accounts for anisotropic material behavior and crack propagation is presented within the small and large deformation context. Different kinds of material anisotropy are incorporated by (i) enhancing the crack surface density function by appropriate structural tensors stemming from a rigorous application of the theory of tensor invariants and (ii) by a modification of energetic and stress-like fracture criteria.
Phase Field Modeling of Fracture in Anisotropic Brittle Solids (Keynote)
Stephan Teichtmeister (University of Stuttgart), Daniel Kienle (University of Stuttgart), Fadi Aldakheel (Leibniz Universität Hannover), Marc-André Keip (University of Stuttgart)
Kurzfassung:
A phase field model of fracture that accounts for anisotropic material behavior and crack propagation is presented within the small and large deformation context. Different kinds of material anisotropy are incorporated by (i) enhancing the crack surface density function by appropriate structural tensors stemming from a rigorous application of the theory of tensor invariants and (ii) by a modification of energetic and stress-like fracture criteria.
11:10
Adaptive Isogeometric Phase-Field Modeling of Ductile Fracture
Paul Hennig (Technische Universität Dresden), Markus Kästner (Technische Universität Dresden), Marreddy Ambati (Technical University of Braunschweig), Laura De Lorenzis (Technical University of Braunschweig)
Kurzfassung:
To increase the computational efficiency of phase field models of ductile fracture, we have developed an isogeometric framework for adaptive local mesh refinement. This includes appropriate marking criteria to select elements for refinement, the creation of the locally refined basis and a projection of the nodal displacements and internal variables. We provide and analyze marking criteria and projection methods and compare their numerical applicability in several numerical examples.
Adaptive Isogeometric Phase-Field Modeling of Ductile Fracture
Paul Hennig (Technische Universität Dresden), Markus Kästner (Technische Universität Dresden), Marreddy Ambati (Technical University of Braunschweig), Laura De Lorenzis (Technical University of Braunschweig)
Kurzfassung:
To increase the computational efficiency of phase field models of ductile fracture, we have developed an isogeometric framework for adaptive local mesh refinement. This includes appropriate marking criteria to select elements for refinement, the creation of the locally refined basis and a projection of the nodal displacements and internal variables. We provide and analyze marking criteria and projection methods and compare their numerical applicability in several numerical examples.
11:30
Data-driven crack assessment
Katrin Schulz (Karlsruhe Institute of Technology (KIT)), Valentin Verrier (Karlsruhe Institute of Technology (KIT)), Stephan Kreis (Karlsruhe Institute of Technology (KIT))
Kurzfassung:
Different methods of selection and feature creation are considered in order to discuss the chances and limits of a data driven assessment of cracks. We apply different methods of data mining to find correlations which yield an unconventional approach for the prediction of critical crack states and material failure. The results of different explorative multivariate analyses will be compared and discussed in the context of applicability in engineering science.
Data-driven crack assessment
Katrin Schulz (Karlsruhe Institute of Technology (KIT)), Valentin Verrier (Karlsruhe Institute of Technology (KIT)), Stephan Kreis (Karlsruhe Institute of Technology (KIT))
Kurzfassung:
Different methods of selection and feature creation are considered in order to discuss the chances and limits of a data driven assessment of cracks. We apply different methods of data mining to find correlations which yield an unconventional approach for the prediction of critical crack states and material failure. The results of different explorative multivariate analyses will be compared and discussed in the context of applicability in engineering science.
11:50
Discussion of crack initiation in metal matrix composites
Markus Sudmanns (Karlsruhe Institute of Technology (KIT)), Katrin Schulz (Karlsruhe Institute of Technology (KIT))
Kurzfassung:
Understanding the mechanisms of micro-crack initiation in metals is of high academic as well as industrial interest. In this contribution, we discuss the role of stress concentrations in metal matrix composite materials as the cause of crack initiation. Using a continuum representation of dislocation microstructures, we compare microscale simulations to experimental studies of crack initiation and discuss the dislocation microstructure around a crack tip.
Discussion of crack initiation in metal matrix composites
Markus Sudmanns (Karlsruhe Institute of Technology (KIT)), Katrin Schulz (Karlsruhe Institute of Technology (KIT))
Kurzfassung:
Understanding the mechanisms of micro-crack initiation in metals is of high academic as well as industrial interest. In this contribution, we discuss the role of stress concentrations in metal matrix composite materials as the cause of crack initiation. Using a continuum representation of dislocation microstructures, we compare microscale simulations to experimental studies of crack initiation and discuss the dislocation microstructure around a crack tip.