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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Solid Mechanics

Background:

  • Amorphous solids exhibit complex deformation behaviors.
  • Understanding plastic rearrangements is crucial for predicting material failure.

Purpose of the Study:

  • To map the discrete plastic rearrangements in amorphous solids.
  • To reveal the network topology underlying deformation.
  • To connect network organization to material memory and behavior.

Main Methods:

  • Mapping particle rearrangements to a directed network.
  • Analyzing network topology and its relation to deformation.
  • Investigating localized particle rearrangements ('soft spots') and their interactions.

Main Results:

  • The network exhibits highly connected regions and one-way transitions.
  • Hierarchical organization of hysteresis cycles and subcycles was identified.
  • Near-perfect return point memory was observed at small to moderate strains.

Conclusions:

  • Network topology provides insight into reversible and irreversible behaviors.
  • Localized rearrangements and their interactions drive deformation mechanisms.
  • The network representation offers a new framework for studying amorphous solids.