Statistical structural mechanism for shear localization in amorphous materials

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

Acta Materialia, 2025, 298, 121385

アクセス数:4件（2025-11-07 12:31 集計）

固定URL: https://hdl.handle.net/11094/102863

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タイトル
Statistical structural mechanism for shear localization in amorphous materials
著者
著者名
Wei, Dan
著者名
Wang, Yun Jiang
NRID
1000020273584 1000020273584
ORCID
0000-0002-9072-4496 0000-0002-9072-4496
researchmap permalink
read0185246 read0185246
Scopus Author ID
7201796489 7201796489
著者名
Ogata, Shigenobu
キーワード等
Amorphous solids
Entropy
Local structure
Shear localization
Statistical mechanics
内容
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.
抄録
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.
出版者
Acta Materialia Inc
収録物名
Acta Materialia
巻(号)
298
ページ
121385
刊行年月
2025-10-01
言語
英語
ハンドルURL
https://hdl.handle.net/11094/102863
PISSN
13596454
関連情報 (isIdenticalTo)
DOI (出版社版)
https://doi.org/10.1016/j.actamat.2025.121385
アクセス権
open access
権利情報
This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article