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Title: New self-consistent homogenization for thermo-elastic polycrystals with imperfect interfaces

Abstract

Here we present a new thermo-elastic self-consistent formulation to calculate the thermo-mechanical response of polycrystalline aggregates with imperfect interfaces. The new model is based on an improved treatment of the effect of imperfect interfaces on the micromechanical response of the grains compared to pre-existing models. New expressions/algorithms are derived for the effective elastic and thermal properties, localization relations, and calculation of intragranular field fluctuations. In addition, derivation of a novel integral equation for the strain field in a heterogeneous elastic medium subjected to arbitrary thermal strain field and displacement jumps is presented. The new model is applied to study the effective thermo-elastic properties and average field fluctuations as a function of the interface properties for imperfectly-bonded triaminotrinitrobenzene (TATB) polycrystalline granular aggregates. The proposed formulation is general in the sense that it can be extended to other material systems and deformation regimes that require a proper consideration of the effect of imperfect interface properties on the material's thermo-mechanical response.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
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:
1726215
Alternate Identifier(s):
OSTI ID: 1809494
Report Number(s):
LA-UR-20-24726
Journal ID: ISSN 0167-6636
Grant/Contract Number:  
89233218CNA000001; 20180441ER; 20200182DR
Resource Type:
Accepted Manuscript
Journal Name:
Mechanics of Materials
Additional Journal Information:
Journal Volume: 155; Journal Issue: C; Journal ID: ISSN 0167-6636
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; polycrystalline material; stress concentrations; thermomechanical process; stress fluctuations; crystal mechanics; imperfect interfaces; triaminotrinitrobenzene (TATB)

Citation Formats

Zecevic, Miroslav, Bennett, Kane, Luscher, Darby Jon, and Lebensohn, Ricardo A. New self-consistent homogenization for thermo-elastic polycrystals with imperfect interfaces. United States: N. p., 2020. Web. doi:10.1016/j.mechmat.2020.103651.
Zecevic, Miroslav, Bennett, Kane, Luscher, Darby Jon, & Lebensohn, Ricardo A. New self-consistent homogenization for thermo-elastic polycrystals with imperfect interfaces. United States. https://doi.org/10.1016/j.mechmat.2020.103651
Zecevic, Miroslav, Bennett, Kane, Luscher, Darby Jon, and Lebensohn, Ricardo A. Tue . "New self-consistent homogenization for thermo-elastic polycrystals with imperfect interfaces". United States. https://doi.org/10.1016/j.mechmat.2020.103651. https://www.osti.gov/servlets/purl/1726215.
@article{osti_1726215,
title = {New self-consistent homogenization for thermo-elastic polycrystals with imperfect interfaces},
author = {Zecevic, Miroslav and Bennett, Kane and Luscher, Darby Jon and Lebensohn, Ricardo A.},
abstractNote = {Here we present a new thermo-elastic self-consistent formulation to calculate the thermo-mechanical response of polycrystalline aggregates with imperfect interfaces. The new model is based on an improved treatment of the effect of imperfect interfaces on the micromechanical response of the grains compared to pre-existing models. New expressions/algorithms are derived for the effective elastic and thermal properties, localization relations, and calculation of intragranular field fluctuations. In addition, derivation of a novel integral equation for the strain field in a heterogeneous elastic medium subjected to arbitrary thermal strain field and displacement jumps is presented. The new model is applied to study the effective thermo-elastic properties and average field fluctuations as a function of the interface properties for imperfectly-bonded triaminotrinitrobenzene (TATB) polycrystalline granular aggregates. The proposed formulation is general in the sense that it can be extended to other material systems and deformation regimes that require a proper consideration of the effect of imperfect interface properties on the material's thermo-mechanical response.},
doi = {10.1016/j.mechmat.2020.103651},
journal = {Mechanics of Materials},
number = C,
volume = 155,
place = {United States},
year = {Tue Nov 17 00:00:00 EST 2020},
month = {Tue Nov 17 00:00:00 EST 2020}
}

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