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Stress Calculations for Carbon NanotubesAtomic stresses were calculated for carbon nanotubes under strain conditions. Graphitic tubules with radii ranging from approximately 2 to 11 Angstroms and two different tubule structures with varying atomic orientations were included in the calculations. Elongations and contractions were applied in the axial direction and atomic stress values were calculated for infinitely long tubules. The calculations were carried out using Brenner's function which was developed for carbon species. Results indicate that the stress is tensile in the radial direction while it is compressive in the tangential direction. Variations in stress values in the direction of the cylindrical aids were investigated as a function of applied strain. Furthermore, using the stress-strain curve (calculated based on atomic considerations), the values of Young's modulus and Poisson's ratio for nanotubules were also estimated.
Document ID
20020039950
Acquisition Source
Ames Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Halicioglu, Timur
(Thermoscience Inst. Moffett Field, CA United States)
Langhoff, Stephen R.
Date Acquired
August 20, 2013
Publication Date
January 1, 1996
Subject Category
Nonmetallic Materials
Funding Number(s)
CONTRACT_GRANT: NAS2-14031
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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