Simulation of dynamic crystal plasticity with a Lagrangian discontinuous Galerkin hydrodynamic method
Abstract
Here we present a new Lagrangian modal discontinuous Galerkin (DG) hydrodynamic method that supports a dynamic dislocation based crystal plasticity model for simulating the mechanical behavior of crystallographic materials, both single crystal and polycrystalline, under dynamic conditions. A modal DG approach is used to evolve fields relevant to conservation laws. These fields are approximated by Taylor series polynomials of varying degree. These polynomials describe macro-scale hydrodynamic behavior while their evolution is determined by evaluating the dynamic crystal plasticity model at material points within the element. The dynamic crystal plasticity model is sensitive to the time increment size, with too large of time increments leading to instability in the model. To mitigate this, the temporal evolution of the dynamic crystal plasticity model is achieved with the combination of a sub-incrementing scheme with Heun’s third-order time integration scheme, which is also used to temporally evolve the governing equations. The implementation of the dynamic crystal plasticity model within the DG framework is tested using a 2D approximation of the Taylor impact test with a single crystal material, using quadratic elements that have faces that can bend. In addition to the standard continuous material modeling, we propose a new simulation method that would representmore »
- Authors:
-
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Remcom Inc, State College, PA (United States)
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Theoretical Div.
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
- OSTI Identifier:
- 1994120
- Alternate Identifier(s):
- OSTI ID: 1862605
- Report Number(s):
- LA-UR-21-22222
Journal ID: ISSN 0045-7825
- Grant/Contract Number:
- 89233218CNA000001; LA-UR-21-22222
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Computer Methods in Applied Mechanics and Engineering
- Additional Journal Information:
- Journal Volume: 386; Journal ID: ISSN 0045-7825
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; lagrangian; hydrodynamics; discontinuous Galerkin; solid dynamics; crystal plasticity; polycrystal
Citation Formats
Lieberman, Evan J., Liu, Xiaodong, Morgan, Nathaniel R., and Luscher, Darby J. Simulation of dynamic crystal plasticity with a Lagrangian discontinuous Galerkin hydrodynamic method. United States: N. p., 2021.
Web. doi:10.1016/j.cma.2021.114103.
Lieberman, Evan J., Liu, Xiaodong, Morgan, Nathaniel R., & Luscher, Darby J. Simulation of dynamic crystal plasticity with a Lagrangian discontinuous Galerkin hydrodynamic method. United States. https://doi.org/10.1016/j.cma.2021.114103
Lieberman, Evan J., Liu, Xiaodong, Morgan, Nathaniel R., and Luscher, Darby J. Wed .
"Simulation of dynamic crystal plasticity with a Lagrangian discontinuous Galerkin hydrodynamic method". United States. https://doi.org/10.1016/j.cma.2021.114103. https://www.osti.gov/servlets/purl/1994120.
@article{osti_1994120,
title = {Simulation of dynamic crystal plasticity with a Lagrangian discontinuous Galerkin hydrodynamic method},
author = {Lieberman, Evan J. and Liu, Xiaodong and Morgan, Nathaniel R. and Luscher, Darby J.},
abstractNote = {Here we present a new Lagrangian modal discontinuous Galerkin (DG) hydrodynamic method that supports a dynamic dislocation based crystal plasticity model for simulating the mechanical behavior of crystallographic materials, both single crystal and polycrystalline, under dynamic conditions. A modal DG approach is used to evolve fields relevant to conservation laws. These fields are approximated by Taylor series polynomials of varying degree. These polynomials describe macro-scale hydrodynamic behavior while their evolution is determined by evaluating the dynamic crystal plasticity model at material points within the element. The dynamic crystal plasticity model is sensitive to the time increment size, with too large of time increments leading to instability in the model. To mitigate this, the temporal evolution of the dynamic crystal plasticity model is achieved with the combination of a sub-incrementing scheme with Heun’s third-order time integration scheme, which is also used to temporally evolve the governing equations. The implementation of the dynamic crystal plasticity model within the DG framework is tested using a 2D approximation of the Taylor impact test with a single crystal material, using quadratic elements that have faces that can bend. In addition to the standard continuous material modeling, we propose a new simulation method that would represent the heterogeneous behavior of polycrystalline microstructures within an element by varying the position and material properties of the material points within the element. This method is demonstrated using random orientation distributions on materials points that are arranged in both structured and random configurations.},
doi = {10.1016/j.cma.2021.114103},
journal = {Computer Methods in Applied Mechanics and Engineering},
number = ,
volume = 386,
place = {United States},
year = {Wed Aug 25 00:00:00 EDT 2021},
month = {Wed Aug 25 00:00:00 EDT 2021}
}
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