Statistical structural mechanism for shear localization in amorphous materials

Wei, Dan; Wang, Yun Jiang; Ogata, Shigenobu

Acta Materialia, 2025, 298, 121385

Number of Access:4（2025-11-07 13:01 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/102863

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Title
Statistical structural mechanism for shear localization in amorphous materials
Creator
CreatorName
Wei, Dan
CreatorName
Wang, Yun Jiang
NRID
1000020273584 1000020273584
ORCID
0000-0002-9072-4496 0000-0002-9072-4496
researchmap permalink
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Scopus Author ID
7201796489 7201796489
CreatorName
Ogata, Shigenobu
Subject
Amorphous solids
Entropy
Local structure
Shear localization
Statistical mechanics
Description
Wei D., Wang Y.J., Ogata S.. Statistical structural mechanism for shear localization in amorphous materials. Acta Materialia 298, 121385 (2025); https://doi.org/10.1016/j.actamat.2025.121385.
Abstract
Shear localization is a prevalent phenomenon in amorphous materials undergoing plastic deformation, yet its underlying structural mechanism at the atomic scale remains elusive. Here we introduce a quantitative approach to correlate structural order and disorder with the degree of shear localization in amorphous materials. This approach relies on two fundamental physical parameters: the statistical structural order, derived from Shannon entropy of local Voronoi structures, and the localization susceptibility, characterized by spatial correlations in atomic-scale von Mises strain. Extensive atomistic simulations validate our approach and reveal a universal relationship between structural order and shear localization across a wide range of amorphous solids, each with distinct chemical compositions and thermal histories. We interpret the correlation between structural order and shear localization within a framework of shear banding as a mechanically-driven glass transition, governed by a structural collapse analogous to thermodynamic glass transitions on the potential energy landscape.
Publisher
Acta Materialia Inc
Source Title
Acta Materialia
Volume (Issue)
298
Page
121385
Date of Issued
2025-10-01
Language
English
Handle URL
https://hdl.handle.net/11094/102863
PISSN
13596454
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.actamat.2025.121385
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article