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  3. Department Materials Science and Engineering

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Institute of Materials Simulation

Website of the Institute of Materials Simulation

In page navigation: Institute Seminar
  • Summer Term 2023
    • Parametrization of a phase-field model for ferroelectrics with defects from molecular dynamics data
    • Prediction of thermodynamic parameters from simulated 2D dendritic morphology via machine learning.
    • Radioisotope Thermoelectric Generator: Design, Manufacturing and Testing.
  • Winter Term 2022/23
    • An introduction to the nonlocal macro-meso-scale consistent damage model
  • Summer Term 2022
    • Discovering Equations from Graph Neural Networks using Symbolic Regression
    • Analysis of ferroelectrics using molecular dynamics
    • Fracture surface geometry in 3D hierarchical material adhesion
    • From Atomic Defects To Turbine Blades: Multiscale Modeling & Informatics Towards Materials By Design For Extreme Conditions
  • Winter Term 2021/22
    • Network modelling: examples from computational neuroscience, biomaterial fracture and polymer mechanics
    • Spectral Signatures of Fault Tolerant Neural Architectures
    • Automatic design of mechanical metamaterials
    • Disordered mechanical metamaterials
  • Summer Term 2021
    • Brain dynamics and function in large-scale network models
  • Winter Term 2020/21
    • Experiments and Modelling of Emerging Energy Materials
    • Measuring the stability of ecological communities
    • Spontaneous activity in brain networks
    • Nanoscopic Robots
  • Summer Term 2020
  • Winter Term 2019/20
    • Modelling uni-axial and cyclic deformation of gradient nano-grained materials
    • Accelerating High-Resolution Simulations of Elastohydrodynamic Lubrication Contacts
    • Localization in hierarchical networks: From statistical physics to neuroscience and materials science applications
    • Model evaluation in tropical rainforests: Spatial correlations and density fluctuations
    • A beam network model for strength optimization of fibrous materials
    • Multiscale discrete dislocation dynamics simulation of gradient nano-grained material
    • Cyclic plasticity of high entropy alloy: experiments, modelling and simulations
    • Charge transfer and transport in carbon polymers and biopolymers
    • On the numerical atomistic characterization of interfacial plasticity
  • Summer Term 2019
    • Machine learning plastic deformation of crystals
    • Equivalence of the Burridge-Knopoff train model of earthquakes and the dynamics of driven Edwards-Wilkinson interfaces
    • From molecular simulation to wave detection in heterogeneous excitable media
    • Slow and Anomalous Dynamics in Hierarchical Modular models of Brain Networks
    • FEM Simulation of Dissipation and Damping in Shape Memory Alloys
  • Winter Term 2018/19
    • Robustness of hierarchical network organization in models of functional connectivity
    • Modelling the mechanical behaviour of porous cohesive granular material using discrete elements: Application to snow failure
    • Nucleation process of earthquakes: Instability, acceleration, and sensitivity to perturbations
    • Migration mechanisms of faceted vicinal grain boundaries
    • Molecular dynamics simulation on glass transition temperature of polyimides
    • From flat sheets to folded geometries: Understanding Origami approaches and simulation models
    • Beyond classical thermodynamics: dislocation-mediated plasticity
    • Mechanics of a model cohesive granular medium
  • Summer Term 2018
    • Effect of vertical twin boundary on the mechanical properties of bicrystalline copper micropillars
    • Network Dimension as Damage Indicator in Biosystems
    • Dislocation mechanism based size-dependent crystal plasticity modeling and simulation of gradient nano-grained copper.
    • Forecasting catastrophe: Statistical physics approach
    • On stress and driving force calculation within multi-phase-field models: Applications to martensitic phase transformation and crack propagation in multiphase systems
    • A Dislocation-based Multiscale modeling of Strength and Ductility of Materials with Gradient Microstructure
    • Coupled Problems in Constitutive Modeling Across Various Lenght-Scales
    • Optimization of network structures in view of failure resilience
  • Winter Term 2017/18
    • Simulating Biomaterials as Hierarchical Networks
    • Theoretical study of Electrocardiogram(EKG)
    • Percolation behaviour study of metal nanoparticle in DLC matrix
    • Improved Understanding of Plasticity Mechanisms in Metals and Ceramics in Light of Atomic Scale Simulations Results
    • Introduction to Topological Data Analysis and an application of brain functional networks
    • Nanoscale strain mapping during in situ deformation in the TEM
    • A statistical approach to charaterize discrete dislocation data
    • The effect of platinum nanoparticles on the adhesion behaviour of graphene inter-layers: a molecular dynamics study
    • Dislocation patterning in a 2D stochastic continuum model
    • Adiabatic shear banding and fracture during high speed shear cutting: Numerical study
    • Mesoscale Simulation of Shape Memory Alloy Film Damping
    • The Role of Damage Diffusion on the Plastic Properties of Amorphous Solids – A Kinetic Monte Carlo Approach
  • Summer Term 2017
    • Topological dimension tunes activity patterns in hierarchical modular network models
    • On the properties of (scale-free) random networks
    • From multimodal images to connectivity of brain networks in both healthy and pathological conditions
    • Neutral neural dynamics: a tale about physics, ecology and the brain
    • Precursor phenomena of creep failure in disordered materials
    • Skeletal Muscles as Prototypes of Active Materials
  • Winter Term 2016/17
    • Phase-field Modeling of Functional Materials
    • The Capriccio method as a novel technique to couple MD and FE simulations of polymers
    • Static and Dynamic Friction of hierarchical surfaces
    • Defect nucleation and mobility in gold nanowires
    • On the temporal coarse graining in dislocation dynamics
    • Phase-field models for thermo-magneto-mechanical coupling in shape memory alloys
    • Microstructure informed constitutive models and SPH crystal plasticity modelling approaches
  • Summer Term 2016
    • Smoothed Particle Hydrodynamics
  • Winter Term 2015/16
    • How resilient are biological networks?
    • Modelling and Simulation of Self-healing Thermosetting Polymers
    • Analysis of Shear Band Formation in Metallic Multilayer Nanocomposites using DEM
    • The Discrete-Continuum Model: Simulation of crystal plasticity in micro- and nano- objects
  • Summer Term 2015
    • Comparison of various continuum models of dislocations system
    • Multiscale modeling of collagen tissue mechanics
    • Size effects in failure of defected graphene
    • The relationship between structure and dynamics in complex networks
    • Deformation in metallic nanomaterials
    • From mild to wild fluctuations in crystal plasticity, and associated size effects
    • Curvature effects on the plastic behavior of metals as studied by atomistic simulations
  • Winter Term 2014/15
    • Fluid flow, heat transfer and particle distribution in electromagnetic stirrer
    • Modelling Spatio-Temporal Strain Localization of Snow
    • Continuum dislocation modelling of cyclic fatigue in the crystal plasticity finite element framework
    • Strongly heterogeneous continuum dislocation plasticity
    • Biomechanical modelling bone and bone-implant systems
    • How (not) to model dislocation patterns
    • Rounding of phase transitions in cortical networks: the advantages of a low-dimensional brain
  • Summer Term 2014
    • Adsorption of water on calcite surface: theoretical study and experiments
    • Avalanches and glassy relaxation in brain networks
    • Phase field models and plastic flow
    • Fragmentation of plastic materials
    • A Discrete Approach to Describe the Interaction between a Tire Tread and a Snow-Covered Road
    • Dislocations in bilayer graphene
    • Higher order continuum modelling of the compressive behaviour of snow
  • Winter Term 2013/14
    • Avalanche localization and universality class of amorphous plasticity
    • G2C2: Geometry, Generalized Continua and Compatibility
    • Field models of anisotropic dislocation systems
    • Micromechanics of Geomaterials using Generalised Continuum Models
    • Monte Carlo Simulation of Creep Deformation of Amorphous Materials
    • Modelling of materials with random microstructure
    • Snow Fracture and Slab Avalanche Release – A Case Study
    • Avalanche statistics in disordered visco-elastic interfaces
  • Summer Term 2013
    • Continuum Modelling and Simulation of Strain Ageing Phenomena in Metallic Alloys
    • Multiscale Simulation of Concrete
    • Higher order alignment tensors in continuum dislocation dynamics
    • Modeling the Kinetics of Annealing – a Case of Freestyle Racing
    • Bond order potentials for elements and compound
    • Atomistic input to Discrete Dislocation Dynamics
  • Winter Term 2012/13
    • Relating gradient plasticity with Discrete Dislocation Dynamics
    • Anticrack-type Fracture of Foam Glass under Compression
    • Multiscale modelling of MgO single crystal plasticity: From the laboratory conditions to the Earth’s mantle
    • Phase field modeling of microstructure evolution
    • Concurrent Multiscale Simulations of Metal Fracture
    • Statistical properties of plastic deformation of crystalline solids

An introduction to the nonlocal macro-meso-scale consistent damage model

Contact

Institute of Materials Simulation (WW8)

Dr.-Mack-Straße 77
90762 Fürth
  • Phone number: +49 911 6507865061
  • Website: http://www.matsim.tf.fau.de

Yudong Ren

FAU, WW8

15. February 2023, 17:00
WW8, Room 2.018-2, Dr.-Mack-Str. 77, Fürth

Yudong Ren, M. Sc.

Guest researcher

Tongji University, Shanghai, PR China
College of Civil Engineering

  • Email: yudong.ren@fau.de

 

Cracks may appear in the structural components, leading to damage or even collapse of structures subjected to service or extreme loads. Therefore, crack simulation is important in the design and safety evaluation of engineering structures. For this purpose, a novel nonlocal macro-meso-scale consistent damage (NMMD) model for crack simulation and nonlinear analysis was proposed recently. In this model, the meso-scale damage is determined based on the deformation of point pairs, and the macroscale topologic damage, as a metric of degree of discontinuity in the sense of geometry, is the weighted average of mesoscopic damage in material point pairs within the influence domain. The topologic damage is then incorporated into the framework of continuum damage mechanics through the energetic degradation function, which bridges the damage in the sense of energy and the damage in the sense of geometry. This model can be solved numerically by, e.g., the finite element method. The potential intrinsic connection of the NMMD model with peridynamics and the phase field theory will be discussed. Then, a simple approach to determine the energetic degradation function physically for tension-dominated problems and a method for decomposing the topologic damage driving force will be presented. Several numerical examples are shown to verify the model.

Friedrich-Alexander-Universität Erlangen-Nürnberg
Institute of Materials Simulation

Dr.-Mack-Str. 77
90762 Fürth
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