Clustering of negative topological charges precedes plastic failure in 3D glasses.

ABSTRACT: The deformation mechanism in amorphous solids subjected to external shear remains poorly understood because of the absence of well-defined topological defects mediating the plastic deformation. The notion of soft spots has emerged as a useful tool to characterize the onset of irreversible rearrangements and plastic flow, but these entities are not clearly defined in terms of geometry and topology. In this study, we unveil the phenomenology of recently discovered, precisely defined topological defects governing the microscopic mechanical and yielding behavior of a model 3D glass under shear deformation. We identify the existence of vortex-like and antivortex-like topological defects within the 3D nonaffine displacement field. The number density of these defects exhibits a significant antico

SUBMITTER: Bera A 

PROVIDER: S-EPMC11370895 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature