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Related Experiment Video

Updated: Sep 29, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Avalanches, Clusters, and Structural Change in Cyclically Sheared Silica Glass.

Himangsu Bhaumik¹, Giuseppe Foffi², Srikanth Sastry¹

¹Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur Campus, Bengaluru 560064, India.

Physical Review Letters

|March 18, 2022

Summary

This study computationally investigates avalanches and clusters in silica glass, revealing unique cluster statistics and structural changes like densification during yielding.

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Area of Science:

Materials Science
Condensed Matter Physics
Computational Chemistry

Background:

Glasses exhibit complex behaviors like plastic rearrangements under stress.
Understanding yielding mechanisms in strong glasses is crucial for materials design.
Silica is a prototypical strong glass, making it ideal for studying fundamental glass properties.

Purpose of the Study:

To computationally investigate avalanches and clusters in silica glass.
To analyze the nature of structural change during plastic rearrangements.
To compare silica's yielding behavior with other glassy systems.

Main Methods:

Performing detailed computational analysis of avalanches and clusters.
Examining a wide range of system sizes for statistical significance.
Analyzing structural changes associated with yielding and strain localization.

Main Results:

Qualitative yielding aspects in silica are similar to other glasses.
Cluster statistics in silica show significant differences attributed to local structure.
Anomalous structural change and densification, including suppressed tetrahedral order, accompany strain localization across the yielding transition.

Conclusions:

Silica's unique local structure influences its yielding dynamics.
The study provides insights into the relationship between structure and mechanical response in glasses.
Findings contribute to a deeper understanding of plastic deformation in amorphous materials.