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An efficient size-dependent shear deformable shell model and molecular dynamics simulation for axial instability
S Sahmani1, M M Aghdam1, M Bahrami1
1Department of Mechanical Engineering, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran.
Journal of Molecular Graphics & Modelling
|September 14, 2017
Summary
This study investigates silicon nanoshells, revealing how surface energy impacts their buckling behavior. The findings are crucial for designing reliable nanoscale systems by accounting for size-dependent effects.
Area of Science:
- Nanotechnology
- Materials Science
- Mechanical Engineering
Background:
- Designing nanosystems requires understanding nanoscale structural behavior.
- Surface elasticity significantly influences the mechanical properties of nanomaterials.
Purpose of the Study:
- To investigate the nonlinear buckling and postbuckling response of silicon cylindrical nanoshells.
- To develop a size-dependent shell model incorporating surface free energy effects.
Main Methods:
- Developed an efficient size-dependent shear deformable shell model.
- Employed boundary layer theory and perturbation methods for analysis.
- Validated the model using molecular dynamics (MD) simulations with Tersoff potential.
Main Results:
- Predicted size dependency in buckling loads and postbuckling behavior.
- MD simulations confirmed the model's accuracy for silicon nanoshells.
- Surface free energy significantly affects the critical buckling load.
Conclusions:
- The developed continuum shell model accurately predicts the behavior of silicon nanoshells.
- Accounting for surface free energy is essential for accurate nanoscale structural analysis.
- Findings aid in the effective design of silicon-based nanosystems.
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