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Title: A thermo-elastoplastic self-consistent homogenization method for inter-granular plasticity with application to thermal ratcheting of TATB

Abstract

A novel thermo-elastoplastic self-consistent homogenization model for granular materials that exhibit inter-granular plasticity is presented. The model, TEPSCA, is made possible by identifying a new inter-granular plastic Eshelby-like tensor. A micromechanical model of interfacial yielding between grains of a Mohr–Coulomb type is provided, which is relatable to the description of imperfect interfaces within the paradigm of self-consistent homogenization. The local grain constitutive laws are consistent with the description of an interphase layer comprised of local pore volume between grains, such that inelastic inter-particle displacements are directly relatable to changes in bulk porosity, i.e., dilation. The model was developed for the purpose of modeling thermally induced plasticity—the phenomenon known as thermal ratcheting or “ratchet growth”—of composites made from the high explosive triaminotrinitrobenzene (TATB). Model simulations are compared to ratchet growth measurements during cyclic thermal loading of a TATB pellet under stress-free conditions.

Authors:
ORCiD logo; ; ;
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1619410
Alternate Identifier(s):
OSTI ID: 1634960
Report Number(s):
LA-UR-19-28919
Journal ID: ISSN 2213-7467; 3; PII: 139
Grant/Contract Number:  
89233218CNA000001; 20180441ER; AC52-06NA25396
Resource Type:
Published Article
Journal Name:
Advanced Modeling and Simulation in Engineering Sciences
Additional Journal Information:
Journal Name: Advanced Modeling and Simulation in Engineering Sciences Journal Volume: 7 Journal Issue: 1; Journal ID: ISSN 2213-7467
Publisher:
Springer
Country of Publication:
Netherlands
Language:
English
Subject:
42 ENGINEERING; inter-granular; self-consistent homogenization; PBX 9502; TATB; ratchet growth; dilation

Citation Formats

Bennett, Kane C., Zecevic, Miroslav, Luscher, Darby J., and Lebensohn, Ricardo A. A thermo-elastoplastic self-consistent homogenization method for inter-granular plasticity with application to thermal ratcheting of TATB. Netherlands: N. p., 2020. Web. doi:10.1186/s40323-019-0139-6.
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Bennett, Kane C., Zecevic, Miroslav, Luscher, Darby J., & Lebensohn, Ricardo A. A thermo-elastoplastic self-consistent homogenization method for inter-granular plasticity with application to thermal ratcheting of TATB. Netherlands. https://doi.org/10.1186/s40323-019-0139-6
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Bennett, Kane C., Zecevic, Miroslav, Luscher, Darby J., and Lebensohn, Ricardo A. Sat . "A thermo-elastoplastic self-consistent homogenization method for inter-granular plasticity with application to thermal ratcheting of TATB". Netherlands. https://doi.org/10.1186/s40323-019-0139-6.
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@article{osti_1619410,
title = {A thermo-elastoplastic self-consistent homogenization method for inter-granular plasticity with application to thermal ratcheting of TATB},
author = {Bennett, Kane C. and Zecevic, Miroslav and Luscher, Darby J. and Lebensohn, Ricardo A.},
abstractNote = {A novel thermo-elastoplastic self-consistent homogenization model for granular materials that exhibit inter-granular plasticity is presented. The model, TEPSCA, is made possible by identifying a new inter-granular plastic Eshelby-like tensor. A micromechanical model of interfacial yielding between grains of a Mohr–Coulomb type is provided, which is relatable to the description of imperfect interfaces within the paradigm of self-consistent homogenization. The local grain constitutive laws are consistent with the description of an interphase layer comprised of local pore volume between grains, such that inelastic inter-particle displacements are directly relatable to changes in bulk porosity, i.e., dilation. The model was developed for the purpose of modeling thermally induced plasticity—the phenomenon known as thermal ratcheting or “ratchet growth”—of composites made from the high explosive triaminotrinitrobenzene (TATB). Model simulations are compared to ratchet growth measurements during cyclic thermal loading of a TATB pellet under stress-free conditions.},
doi = {10.1186/s40323-019-0139-6},
journal = {Advanced Modeling and Simulation in Engineering Sciences},
number = 1,
volume = 7,
place = {Netherlands},
year = {Sat Feb 15 00:00:00 EST 2020},
month = {Sat Feb 15 00:00:00 EST 2020}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1186/s40323-019-0139-6
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Figures / Tables:

Fig. 1 Fig. 1: Granular assembly: a slice through a representative volume element (RVE) showing local porosity and imperfect interface associated with a grain; b treatment of a grain within SCH scheme having imperfect interface represented as an interphase layer with thickness of grain’s local porosity, such that changes to it translatemore » to changes in porosity. Adapted from Bennett et al.« less
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