Advanced time integration algorithms for dislocation dynamics simulations of work hardening

Sills, Ryan B.; Aghaei, Amin; Cai, Wei

doi:10.1088/0965-0393/24/4/045019

Advanced time integration algorithms for dislocation dynamics simulations of work hardening

Journal Article · Mon Apr 25 00:00:00 EDT 2016 · Modelling and Simulation in Materials Science and Engineering

DOI:https://doi.org/10.1088/0965-0393/24/4/045019· OSTI ID:1319494

Sills, Ryan B. ^[1]; Aghaei, Amin ^[2]; Cai, Wei ^[2]

Stanford Univ., Stanford, CA (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Stanford Univ., Stanford, CA (United States)

Efficient time integration is a necessity for dislocation dynamics simulations of work hardening to achieve experimentally relevant strains. In this work, an efficient time integration scheme using a high order explicit method with time step subcycling and a newly-developed collision detection algorithm are evaluated. First, time integrator performance is examined for an annihilating Frank–Read source, showing the effects of dislocation line collision. The integrator with subcycling is found to significantly out-perform other integration schemes. The performance of the time integration and collision detection algorithms is then tested in a work hardening simulation. The new algorithms show a 100-fold speed-up relative to traditional schemes. As a result, subcycling is shown to improve efficiency significantly while maintaining an accurate solution, and the new collision algorithm allows an arbitrarily large time step size without missing collisions.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-CA), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1319494

Alternate ID(s):: OSTI ID: 1250064
OSTI ID: 22747907

Report Number(s):: SAND--2015-10883J; 617636

Journal Information:: Modelling and Simulation in Materials Science and Engineering, Journal Name: Modelling and Simulation in Materials Science and Engineering Journal Issue: 4 Vol. 24; ISSN 0965-0393

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Fundamentals of Dislocation Dynamics Simulations Sills, Ryan B.; Kuykendall, William P.; Aghaei, Amin Multiscale Materials Modeling for Nanomechanics https://doi.org/10.1007/978-3-319-33480-6_2	book	January 2016
A spectral approach for discrete dislocation dynamics simulations of nanoindentation Bertin, Nicolas; Glavas, Vedran; Datta, Dibakar Modelling and Simulation in Materials Science and Engineering, Vol. 26, Issue 5 https://doi.org/10.1088/1361-651x/aabea1	journal	May 2018
GPU-accelerated dislocation dynamics using subcycling time-integration Bertin, N.; Aubry, S.; Arsenlis, A. Modelling and Simulation in Materials Science and Engineering, Vol. 27, Issue 7 https://doi.org/10.1088/1361-651x/ab3a03	journal	August 2019

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