Linking initial microstructure and local response during quasistatic granular compaction

Journal Article · Mon Jul 24 00:00:00 EDT 2017 · Physical Review E

DOI:https://doi.org/10.1103/PhysRevE.96.012905· OSTI ID:1406424

Hurley, R. C. ^[1]; Lind, J. ^[1]; Pagan, D. C. ^[1]; Homel, M. A. ^[1]; Akin, M. C. ^[1]; Herbold, E. B. ^[1]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences

In this study, we performed experiments combining three-dimensional x-ray diffraction and x-ray computed tomography to explore the relationship between microstructure and local force and strain during quasistatic granular compaction. We found that initial void space around a grain and contact coordination number before compaction can be used to predict regions vulnerable to above-average local force and strain at later stages of compaction. We also found correlations between void space around a grain and coordination number, and between grain stress and maximum interparticle force, at all stages of compaction. Finally, we observed grains that fracture to have an above-average initial local void space and a below-average initial coordination number. In conclusion, our findings provide (1) a detailed description of microstructure evolution during quasistatic granular compaction, (2) an approach for identifying regions vulnerable to large values of strain and interparticle force, and (3) methods for identifying regions of a material with large interparticle forces and coordination numbers from measurements of grain stress and local porosity.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: AC52-07NA27344; AC02-06CH11357; 17-LW-009; 16-ERD-010
• OSTI ID: 1406424
• Alternate ID(s): OSTI ID: 1372578
• Report Number(s): LLNL-JRNL-725572; PLEEE8
• Journal Information: Physical Review E, Vol. 96, Issue 1; ISSN 2470-0045
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

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