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Networks and Hierarchies: How Amorphous Materials Learn to Remember.

08:00 EDT 25th October 2019 | BioPortfolio

Summary of "Networks and Hierarchies: How Amorphous Materials Learn to Remember."

We consider the slow and athermal deformations of amorphous solids and show how the ensuing sequence of discrete plastic rearrangements can be mapped onto a directed network. The network topology reveals a set of highly connected regions joined by occasional one-way transitions. The highly connected regions include hierarchically organized hysteresis cycles and subcycles. At small to moderate strains this organization leads to near-perfect return point memory. The transitions in the network can be traced back to localized particle rearrangements (soft spots) that interact via Eshelby-type deformation fields. By linking topology to dynamics, the network representations provide new insight into the mechanisms that lead to reversible and irreversible behavior in amorphous solids.

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This article was published in the following journal.

Name: Physical review letters
ISSN: 1079-7114
Pages: 178002

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