Journal
CONTINUUM MECHANICS AND THERMODYNAMICS
Volume 32, Issue 5, Pages 1497-1513Publisher
SPRINGER
DOI: 10.1007/s00161-020-00862-8
Keywords
Granular micromechanics; Chiral metamaterial; Micromorphic continuum; Micro; macroidentification; Discrete element
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Funding
- United States National Science Foundation [CMMI-1727433]
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Granular micromechanics approach (GMA) provides a predictive theory for granular material behavior by connecting the grain-scale interactions to continuum models. Here, we have used GMA to predict the closed-form expressions for elastic constants of macroscale chiral granular metamaterial. It is shown that for macroscale chirality, the grain-pair interactions must include coupling between normal and tangential deformations. We have designed such a grain-pair connection for physical realization and quantified with FE model. The verification of the prediction is then performed using a physical model of 1D bead string obtained by 3D printing. The behavior is also verified using a discrete model of 1D bead string.
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