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Mechanoluminescent Visualization of Crack Propagation for Joint Evaluation
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Crack propagation in graphene monolayer under tear loading.
Shijia Ye1, Yang Cai, Xiaoyi Liu
1Department of Engineering Mechanics, South China University of Technology, Guangzhou, Guangdong 510640, P. R. China. yaoxh@scut.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|January 19, 2019
Summary
This study models crack propagation in graphene using analytical and molecular dynamics methods. Results show excellent agreement, improving understanding of graphene
Area of Science:
- Materials Science
- Nanotechnology
- Solid Mechanics
Background:
- Graphene's unique properties make it promising for advanced devices.
- Understanding crack propagation is crucial for graphene's mechanical reliability.
- Mode-III loading (tear) effects on graphene are not fully characterized.
Purpose of the Study:
- To investigate crack propagation in monolayer graphene under mode-III loading.
- To develop and validate an analytical model for crack behavior.
- To compare simulation results with theoretical predictions.
Main Methods:
- Utilized an energy-based analytical model.
- Performed molecular dynamics (MD) simulations.
- Analyzed crack propagation velocity and fracture surface characteristics.
Main Results:
- Cracks predominantly propagate along the zigzag direction.
- Fracture surface roughness varies with loading geometry.
- Analytical model predictions closely match MD simulation outcomes.
- Identified critical stress and size for crack initiation.
Conclusions:
- The study provides a robust understanding of mode-III crack propagation in graphene.
- The validated model aids in predicting graphene's mechanical response.
- Findings are essential for designing reliable graphene-based electronic devices.
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