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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 V. Upadhyay, Jérémy Bleyer, Vincent Taupin, Stéphane Berbenni
On-Site Speaker (Planned) Manas V. 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

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