A5084108406- Solidification and crystal growth phenomena
- Lattice Boltzmann Simulation Studies
- Aluminum Alloy Microstructure Properties
- Cellular and Composite Structures
- Composite Structure Analysis and Optimization
- Fluid Dynamics and Heat Transfer
- Ferroelectric and Piezoelectric Materials
- Material Properties and Applications
- Fluid Dynamics and Turbulent Flows
- Topology Optimization in Engineering
- Composite Material Mechanics
- Advanced Numerical Methods in Computational Mathematics
- Microstructure and Mechanical Properties of Steels
- Metallic Glasses and Amorphous Alloys
- Polymer Foaming and Composites
- Coagulation and Flocculation Studies
- Shape Memory Alloy Transformations
- Aerodynamics and Fluid Dynamics Research
- Block Copolymer Self-Assembly
- Polymer composites and self-healing
- Iterative Learning Control Systems
- Plant Surface Properties and Treatments
- Additive Manufacturing Materials and Processes
- High-Velocity Impact and Material Behavior
- Numerical methods in engineering
Karlsruhe University of Applied Sciences
2021-2025
Karlsruhe Institute of Technology
2019-2025
Triply periodic minimal surface (TPMS) structures have a very good lightweight potential, due to their surface-to-volume ratio, and thus are contents of various applications research areas, such as tissue engineering, crash structures, or heat exchangers. While TPMS with uniform porosity linear gradient been considered in the literature, this paper focuses on investigation mechanical properties gyroid non-linear gradients. For realisation different gradients, an algorithm is introduced that...
The present work addresses the simulation of pore emptying during drying battery electrodes. For this purpose, a model based on multiphase-field method (MPF) is used, since it an established approach for modeling and simulating multiphysical problems. A phase fields introduced that takes into account fluid flow, capillary effects, wetting behavior, all which play important role in drying. In addition, MPF makes possible to track movement liquid-air interface without computationally expensive...
<title>Abstract</title> Optimal microstructure design of battery materials is critical to enhance the performance batteries for tailored applications such as high power cells. Accurate simulation thermodynamics, transport, and electrochemical reaction kinetics in commonly used polycrystalline remains a challenge. Here, we combine state-of-the-art multiphase field modelling with smoothed boundary method accurately simulate complex microstructures multi-phase physics. The phase-field employed...
The present work addresses the simulation of pore emptying during drying battery electrodes. For this purpose, a model based on multiphase-field (MPF) method is used, since it an established approach for modeling and simulating multiphysical problems. A phase fields introduced that takes into account fluid flow, capillary effects, wetting behavior, all which play important role in drying. In addition, MPF makes possible to track movement liquid-air interface without computationally expensive...
Metal foams constitute a promising and emerging material class in the context of lightweight construction. There exists variety different foam topologies, on which resulting mechanical properties depend. To maximize potential use under load, present work addresses question how geometrical parameters influence behaviour. Therefore, an algorithm for digital generation design open pore structures is presented, that allows to regulate geometry precisely. A method retrieving effective from...
Abstract A distributed Lagrange multiplier/fictitious domain method in a phase‐field formulation for the simulation of rigid bodies incompressible fluid flow is presented. The yields an implicit representation geometries and thus body particulate flows within arbitrary can be simulated based on fixed Cartesian grid. Therefore, collision model introduced order to address contact particles with solid structures as boundaries. In addition, grain growth boundary geometry considered leading...
Abstract The interaction of immersed rigid bodies with two‐phase flow is high interest in many applications. A model for the coupling a Hohenberg–Halperin type and fictitious domain method consideration introduced leading to full multiphase‐field address overall problem. normalized phase variable used alongside application wetting boundary conditions over diffuse fluid‐solid interface. This enables representation capillary effects different behavior based on Young's law. number simulations...
As a diffusionless phase transformation, martensite evolves at the speed close to sound, with its kinetics and morphology dominated by mechanical energy. However, mechanism of martensitic transformation consideration inertia is rarely investigated. This paper presents multiphase-field model, where strain in performs as wave source, return kinetic energy contributes driving force for transformation. result, fields, i.e., stress velocity, are derived according increment strain. The propagation...
Abstract Triply periodic minimal surfaces (TPMS) are highly versatile porous formations that can be defined by formulas. Computationally based, load-specific shape optimization enables tailoring these structures for their respective application areas and thereby enhance potential. In this investigation, individual sheet-based gyroid with varying porosities specifically optimized respect to stiffness. A modified phase-field method is employed establish a simulation framework the process....
Abstract This study presents a comprehensive simulation of the fused deposition modeling (FFF) process polylactic acid (PLA) using multiphase-field method. Compared to existing works, this work aims simulate overall FFF process. It combines temperature evolution, viscous flow, polymer crystallization, and residual strain calculations within microstructure with mechanical property analysis in single study. Simulation studies were done case layer flowing effect filament distribution...
This work discusses the origin of temperature rise during collision welding process. The different physical irreversible and reversible mechanisms which act as heat sources are described: isentropic compression work, shock dissipation, plasticity, phase transitions. increase due to these effects is quantified in a continuum mechanics approach, compared predictions atomistic molecular dynamics simulations. Focusing on single impact scenario 1100 aluminium at 700 m/s, our results indicate that...
Diffuse interface approaches for multi-phase flow such as Hohenberg-Halperin type models require the approximation of material properties in diffuse transition region. Different interpolation schemes achieving this are employed literature. The present work focuses on diffuseinterface viscous stress. It is shown, that a viscosity based arithmetic mean introduces large deviationsfrom sharp solution cases, where components velocity gradient normal to occur. In contrast, harmonic prone...