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Negative Additive Manufacturing of Complex Shaped Boron Carbides
Published on: September 18, 2018
Continuum modeling of boron nitride nanotubes
1Department of Mechanical and Aerospace Engineering, University of Miami, Coral Gables, FL 33124, USA.
Nanotechnology
|August 12, 2011
Summary
A new finite-deformation shell theory models boron nitride nanotubes, revealing tension instability as material-driven and compression/torsion instabilities as structural. This advances understanding of these unique nanomaterials.
Area of Science:
- Nanotechnology
- Materials Science
- Computational Mechanics
Background:
- Boron nitride nanotubes (BNNTs) possess unique properties for diverse applications.
- Modeling BNNTs requires accounting for atomistic interactions, chirality, and radius.
Purpose of the Study:
- To develop a finite-deformation shell theory for BNNTs based on interatomic potentials.
- To investigate the mechanical instabilities of BNNTs under various loading conditions.
Main Methods:
- Developed a shell theory directly from interatomic potentials to capture nonlinear atomistic interactions.
- Analyzed the effects of tube chirality and radius on BNNT behavior.
- Studied instabilities under tension, compression, and torsion.
Main Results:
- The developed theory models nonlinear, multi-body atomistic interactions.
- Determined that BNNTs can be approximated as linear elastic isotropic shells under certain conditions.
- Differentiated between material instability (tension) and structural instability (compression, torsion).
Conclusions:
- The finite-deformation shell theory accurately captures BNNT behavior.
- Instability mechanisms in BNNTs are dependent on the applied load.
- This research provides insights into the mechanical properties and failure modes of BNNTs.
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