|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fracture Properties and Residual Stresses in Small Dimensions
||Coupling Discrete Dislocation Plasticity and Cohesive Zone Models
||Edmund Tarleton, Angus Wilkinson
|On-Site Speaker (Planned)
The competition between plasticity and fracture results in a brittle-ductile transition in several bcc metals. In order to simulate this, cohesive elements have been incorporated within a discrete dislocation plasticity code which requires a modified superposition scheme to be used. Cohesive elements allow a traction separation law to be implemented within continuum FEM and localised damage and crack propagation can then be simulated in the presence of dislocations. Details of how to correctly couple a cohesive zone model within discrete dislocation dynamics are presented. Finally simulations of micro cantilever bend tests on silicon and tungsten will be shown and the competition between plasticity and fracture is discussed.