About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithm Development in Materials Science and Engineering
|
Presentation Title |
Simulating Dislocation Transport at Experimental Time Scales Using a Time-explicit Runge-Kutta Discontinuous Galerkin Finite Element Scheme |
Author(s) |
Manas Upadhyay, Jérémy Bleyer, Vincent Taupin, Stéphane Berbenni |
On-Site Speaker (Planned) |
Manas Upadhyay |
Abstract Scope |
Dislocation dynamics simulations are very useful in advancing our knowledge on plastic deformation at the intragranular level. Recent advances in non-destructive space/time-resolved characterization techniques e.g., dark-field X-ray microscopy, open the possibility of comparing and validating dislocation dynamics simulation predictions. However, the fine temporal-resolution required to run most dislocation dynamics models often prevents a one-to-one comparison with experiments running at time scales that are several orders of magnitude higher than those achievable by simulations.
Bearing this challenge in mind, we have developed a time-explicit Runge-Kutta Discontinuous Galerkin Finite Element (RKDG-FE) scheme to solve the Field Dislocation Mechanics (FDM) problem. FDM is a continuum theory that rigorously (mathematically and thermo-mechanically) connects dislocation transport and interactions to the static/dynamic response of single/poly-crystals. By implementing FDM numerically with RKDG-FE, we show that it is possible to model transport and interaction of individual dislocations at experimental time scales while keeping a “compact dislocation core”. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Other |