On the origin of microstructural discontinuities in sliding contacts: A discrete dislocation plasticity analysis

Abstract Two-dimensional discrete dislocation plasticity (DDP) calculations that simulate single crystal films bonded to a rigid substrate under sliding by sinusoid-shaped asperity are performed with various contact sizes. The between the thin film and is established preceding indentation modelled using cohesive zone method (CZM), whose behavior governed traction-displacement relation. emergence of microstructural changes observed in tests has been interpreted as localized lattice rotation band produced activity dislocations underneath contact. depth predicted be well commensurate corresponding tests. Furthermore, dimension magnitude have linked distance size. This research reveals underpinning mechanisms for explicitly modelling patterns highly plastic deformation materials scenarios.