Archive – Division Mechanics of Functional Materials – TU Darmstadt

Archive

Fracture analysis on a cracked elliptical hole with surface effect in magnetoelectroelastic solid

2020/02/15

New Publication in “Theoretical and Applied Fracture Mechanics”
Modeling the dielectric breakdown strength and energy storage density of graphite-polymer composites with dielectric damage process

2020/01/30

New Publication in “Materials and Design”
The effect of morphology changes and mechanical stresses on the effective diffusivity of solid electrolyte for lithium ion batteries

2020/01/29

New Publication in “Journal of The Electrochemical Society ”
Non-isothermal Phase-Field Modeling of Heat–Melt–Microstructure-Coupled Processes During Powder Bed Fusion

2020/01/18

New Publication in “JOM”
Picture: MFM/Peter Stein

Picture: MFM/Peter Stein

The Influence of Surface Stress on the Chemo-Mechanical Behavior of Inverse-Opal-Structured Electrodes for Lithium-Ion Batteries

2020/01/16

New publication in the Journal of the Electrochemical Society
Picture: Qihua Gong

Picture: Qihua Gong

Anisotropic exchange in Nd-Fe-B permanent magnets

2019/12/18

New Publication in “Materials Research Letters”

The exchange is critical for designing high-performance Nd–Fe–B permanent magnets. Here we demonstrate through multiscale simulations that the exchange in Nd–Fe–B magnets. The discovered anisotropic exchange is shown to have profound influence on the coercivity. These findings enable more freedom in designing Nd–Fe–B magnets by tuning exchange. … …
Picture: Dominik Ohmer

Picture: Dominik Ohmer

Calculating the magnetocaloric effect in second-order-type material by micromagnetic simulations: A case study on Co2B

2019/11/05

New Publication in “Scripta Materialia”

We propose a calculation scheme which integrates micromagnetic simulations and the Arrott–Noakes equation for the investigation of the influence of microstructure and magnetocrystalline anisotropy on the magnetocaloric effect (MCE) in second-order magnetic phase transition materials. …
Modelling the influence of strain fields around precipitates on defect equilibria and kinetics under irradiation in ODS steels: A multi scale approach

2019/09/27

New Publication in “Journal of Nuclear Materials”

The particle-matrix interface in oxide dispersion strengthened (ODS) steels is considered a sink for point defects created during irradiation. In this work we address the question, if elastic strain fields around oxide particles cause a long-range interaction between the precipitates and point defects. …
Multiscale simulations toward calculating coercivity of Nd-Fe-B permanent magnets at high temperatures

2019/08/10

New Publication in “Physical Review Materials”

A computational scheme integrating the atomistic spin model (ASM) and micromagnetic simulations is proposed to predict the coercivity of Nd-Fe-B permanent magnets at high temperatures. ASM simulations are applied to calculate the temperature-dependent intrinsic parameters of Nd2Fe14B, including the saturated magnetization, magnetocrystalline anisotropy, and exchange stiffness, which are shown to agree well with the experimental values. …
Picture: Yangyiwei Yang

Picture: Yangyiwei Yang

3D non-isothermal phase-field simulation of microstructure evolution during selective laser sintering

2019/08/10

New Publication in “npj Computational Materials”

In this work, we present a three-dimensional finite element phase-field simulation of the SLS single scan, and revealed the process-microstructure relation. We use a thermodynamically consistent non-isothermal phase-field model including various physics (i.e. partial melting, pore structure evolution, diffusion, grain boundary migration, and coupled heat transfer), and interaction of powder bed and laser power absorption. …