WEB Nanoindentation of Al: Molecular dynamics simulations and dislocation dynamics simulationsThursday (02.07.2020) 09:54 - 09:54 Poster Room Part of:
Nanoindentation is one of the widely used methods to explore the mechanical response of materials. The deformation of surfaces is measured to predict the hardness which depends on ductility and strength of the testing material. The nucleation and mobility of dislocations in metallic materials during nanoindentation plays an important role. Therefore, it is crucial to understand plastic deformation at different time and length scales. In this work, we simulate nanoindentation into single crystalline aluminum by means of large-scale molecular dynamics simulations and dislocation dynamics simulations. Statistically equivalent dislocation structures for both methods are generated taking into account identical initial conditions. The mechanical properties of the material such as the hardness will be analyzed for different process parameters. From the atomistic data, nucleation rates will be determined, which will be transferred to the dislocation simulations. Thus, physically correct nucleation rates can be implemented in dislocation simulations, adequately describing the dynamics of dislocations.