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Title: Dynamic Behavior of Engineered Lattice Materials

Abstract

Additive manufacturing (AM) is enabling the fabrication of materials with engineered lattice structures at the micron scale. These mesoscopic structures fall between the length scale associated with the organization of atoms and the scale at which macroscopic structures are constructed. Dynamic compression experiments were performed to study the emergence of behavior owing to the lattice periodicity in AM materials on length scales that approach a single unit cell. For the lattice structures, both bend and stretch dominated, elastic deflection of the structure was observed ahead of the compaction of the lattice, while no elastic deformation was observed to precede the compaction in a stochastic, random structure. The material showed lattice characteristics in the elastic response of the material, while the compaction was consistent with a model for compression of porous media. In conclusion, the experimental observations made on arrays of 4 × 4 × 6 lattice unit cells show excellent agreement with elastic wave velocity calculations for an infinite periodic lattice, as determined by Bloch wave analysis, and finite element simulations.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [3];  [2]
+ Show Author Affiliations
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Washington State Univ., Pullman, WA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Washington State Univ., Pullman, WA (United States). Inst. for Shock Physics; Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
OSTI Identifier:
1465189
Alternate Identifier(s):
OSTI ID: 1474365
Report Number(s):
LLNL-JRNL-680482
Journal ID: ISSN 2045-2322; PII: BFsrep28094; TRN: US1902451
Grant/Contract Number:  
NA0002442; AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Hawreliak, James A., Lind, J., Maddox, B., Barham, M., Messner, M., Barton, N., Jensen, B. J., and Kumar, M. Dynamic Behavior of Engineered Lattice Materials. United States: N. p., 2016. Web. doi:10.1038/srep28094.
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Hawreliak, James A., Lind, J., Maddox, B., Barham, M., Messner, M., Barton, N., Jensen, B. J., & Kumar, M. Dynamic Behavior of Engineered Lattice Materials. United States. https://doi.org/10.1038/srep28094
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Hawreliak, James A., Lind, J., Maddox, B., Barham, M., Messner, M., Barton, N., Jensen, B. J., and Kumar, M. Mon . "Dynamic Behavior of Engineered Lattice Materials". United States. https://doi.org/10.1038/srep28094. https://www.osti.gov/servlets/purl/1465189.
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@article{osti_1465189,
title = {Dynamic Behavior of Engineered Lattice Materials},
author = {Hawreliak, James A. and Lind, J. and Maddox, B. and Barham, M. and Messner, M. and Barton, N. and Jensen, B. J. and Kumar, M.},
abstractNote = {Additive manufacturing (AM) is enabling the fabrication of materials with engineered lattice structures at the micron scale. These mesoscopic structures fall between the length scale associated with the organization of atoms and the scale at which macroscopic structures are constructed. Dynamic compression experiments were performed to study the emergence of behavior owing to the lattice periodicity in AM materials on length scales that approach a single unit cell. For the lattice structures, both bend and stretch dominated, elastic deflection of the structure was observed ahead of the compaction of the lattice, while no elastic deformation was observed to precede the compaction in a stochastic, random structure. The material showed lattice characteristics in the elastic response of the material, while the compaction was consistent with a model for compression of porous media. In conclusion, the experimental observations made on arrays of 4 × 4 × 6 lattice unit cells show excellent agreement with elastic wave velocity calculations for an infinite periodic lattice, as determined by Bloch wave analysis, and finite element simulations.},
doi = {10.1038/srep28094},
journal = {Scientific Reports},
number = 1,
volume = 6,
place = {United States},
year = {Mon Jun 20 00:00:00 EDT 2016},
month = {Mon Jun 20 00:00:00 EDT 2016}
}
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Publisher's Version of Record
https://doi.org/10.1038/srep28094
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