Studying Fatigue Crack Initiation with a new Multiscale Model
Discrete dislocation models are capable to describe metal blocks of 2mm side length. However, interactions of dislocations with the evolving fatigue crack are crudely approximated. Molecular dynamics models are capable to accurately describe the interaction of dislocations with each other and with a fatigue crack during nucleation. However, the simulated domains are very restricted (<100nm).
In this project, we aim at merging these models of different spacial and temporal scales in a domain separating approach. Thereby, we utilize the advantages of each model and cancel out their individual short-comings.
We will develop a novel non-associated approach, which will intrinsically filter out atom undulations of the molecular dynamics domain that would lead to a cumbersome discrete dislocation description.
