A material's microstructure can have an appreciable impact on its effective thermoelastic and/or electric properties. For the optimization of said properties, effective methods for microstructure generation and simulation are necessary
- Procedural mesh generation for different material microstructures
- Finite-Element-based computational homogenization
Continuum modeling of dislocations and their impact on diffusion
Dislocations are nanoscale defects in a material's atomic lattice; despite their small size, the can have an appreciable impact on macroscale material behavior such as ductility or phenomena such as kinematic hardening. Due to the dislocation core structure being different that the surrounding material, they can further constitute paths of higher diffusivity. We are hence concerned with modeling their impact on a material's effective diffusivity, taking into account electric fields and stress-drift effects.
Effective thermoelastic properties of nanoporous metals
Nanoporous metals have gained wide interest as electrochemical actuator. These structures result from removing from a binary alloy one of the components, leaving a structure of randomly oriented ligaements of irregular diameter. These materials show a very high surface-to-volume ratio; heir properties depend on the ligaments' sizes and are affected by surface stresses. We are therefore interested in modeling these structures and to determine their properties as a function of their microstructure.
Effective mechanical properties of additively manufactured materials
Powder bed fusion (PBF) is a family of the common techniques that actualize the AM fabrication in a fashion of sequentially layer-by-layer powder spreading and subsequent binding driven by beam scans. However, it suffers from the trial-and-error during practical application, which is time-and-resource-consuming. To this end, transferable fundamental insights into the process–microstructure–property relationships indubitably play a crucial role in successful manufacturing. This work focus on simulation of the multilayer PBF process and estimate the effective mechanical properties of microstructures. The effects of the PBF process parameters on the residual stress as well as the effective mechanical properties will be investigated.