Single Crystal Plasticity Model with Deformation Twinning for the High Rate Deformation of β-HMX
Abstract
Deformation twinning is an active deformation mechanism during loading along certain crystallographic directions of β-cyclotetramethylene tetranitramine (β-HMX). In this work, a finite strain thermomechanical model is extended to include twinning as a deformation mechanism in addition to plastic slip. The stress is derived from the free energy expression including a term representing the equation of state. The crystal plasticity framework is used to divide the total strain into inelastic and elastic component, where the elastic part is used in the expression for the free energy. The twin systems are treated as pseudo slip systems and the shear rate on the twin systems is evaluated in terms of the twin resistance and the projection of the stress tensor. The model parameters were calibrated against a set of plate impact experiments performed on β-HMX by Dick et al. The remaining plate impact experiments are used to evaluate the predictive capability of the model. The quality of the model fits and predictions is discussed from a physical and modeling perspective. Particularly, the role of twin modeling on results is highlighted. Finally, the model is used to explore the relationship between the propensity for twinning and crystal orientation.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Laboratory Directed Research and Development (LDRD) Program
- OSTI Identifier:
- 1822769
- Report Number(s):
- LA-UR-19-26875
Journal ID: ISSN 0094-243X; TRN: US2214504
- Grant/Contract Number:
- 89233218CNA000001
- Resource Type:
- Accepted Manuscript
- Journal Name:
- AIP Conference Proceedings
- Additional Journal Information:
- Journal Volume: 2272; Conference: 21.Biennial Conference of the APS Topical Group on Shock Compression of Condensed Matter (SHOCK19), Portland, OR (United States), 16-21 Jun 2019; Journal ID: ISSN 0094-243X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Zecevic, Milovan, Addessio, Francis L., Cawkwell, Marc Jon, Ramos, Kyle James, and Luscher, Darby Jon. Single Crystal Plasticity Model with Deformation Twinning for the High Rate Deformation of β-HMX. United States: N. p., 2020.
Web. doi:10.1063/12.0001018.
Zecevic, Milovan, Addessio, Francis L., Cawkwell, Marc Jon, Ramos, Kyle James, & Luscher, Darby Jon. Single Crystal Plasticity Model with Deformation Twinning for the High Rate Deformation of β-HMX. United States. https://doi.org/10.1063/12.0001018
Zecevic, Milovan, Addessio, Francis L., Cawkwell, Marc Jon, Ramos, Kyle James, and Luscher, Darby Jon. Wed .
"Single Crystal Plasticity Model with Deformation Twinning for the High Rate Deformation of β-HMX". United States. https://doi.org/10.1063/12.0001018. https://www.osti.gov/servlets/purl/1822769.
@article{osti_1822769,
title = {Single Crystal Plasticity Model with Deformation Twinning for the High Rate Deformation of β-HMX},
author = {Zecevic, Milovan and Addessio, Francis L. and Cawkwell, Marc Jon and Ramos, Kyle James and Luscher, Darby Jon},
abstractNote = {Deformation twinning is an active deformation mechanism during loading along certain crystallographic directions of β-cyclotetramethylene tetranitramine (β-HMX). In this work, a finite strain thermomechanical model is extended to include twinning as a deformation mechanism in addition to plastic slip. The stress is derived from the free energy expression including a term representing the equation of state. The crystal plasticity framework is used to divide the total strain into inelastic and elastic component, where the elastic part is used in the expression for the free energy. The twin systems are treated as pseudo slip systems and the shear rate on the twin systems is evaluated in terms of the twin resistance and the projection of the stress tensor. The model parameters were calibrated against a set of plate impact experiments performed on β-HMX by Dick et al. The remaining plate impact experiments are used to evaluate the predictive capability of the model. The quality of the model fits and predictions is discussed from a physical and modeling perspective. Particularly, the role of twin modeling on results is highlighted. Finally, the model is used to explore the relationship between the propensity for twinning and crystal orientation.},
doi = {10.1063/12.0001018},
journal = {AIP Conference Proceedings},
number = ,
volume = 2272,
place = {United States},
year = {Wed Nov 04 00:00:00 EST 2020},
month = {Wed Nov 04 00:00:00 EST 2020}
}
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