|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Coupling Experiments and Modeling to Understand Plasticity and Failure
||Simulating Plasticity and Fracture in Micro-cantilevers
||Edmund Tarleton, Johannes Ast, 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. Simulations of micro cantilever bend tests on tungsten will be shown and the competition between plasticity and fracture discussed. Finally comparisons between 2D and 3D models and discrete and strain gradient crystal plasticity simulations will be discussed.
||Planned: Supplemental Proceedings volume