The effects of extensive pitting on the mechanical properties of carbon nanotubes

Steven L. Mielke; Sulin Zhang; Roopam Khare; Rodney S. Ruoff; Ted Belytschko; George C. Schatz

doi:10.1016/j.cplett.2007.08.033

The effects of extensive pitting on the mechanical properties of carbon nanotubes

Steven L. Mielke, Sulin Zhang, Roopam Khare, Rodney S. Ruoff, Ted Belytschko, George C. Schatz

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Abstract

As previously demonstrated, a single hole is sufficient to markedly reduce the fracture strength of a carbon nanotube (CNT). Herein we present calculations exploring the effects of multiple holes on the modulus, fracture strength, and fracture strain of CNTs. The modulus decreases sharply and approximately linearly as a function of the pitting density. A few holes cause a decrease in the failure strain but extensive pitting leads to higher failure strains. These results suggest that the unusually low modulus measurements and high failure strains reported in the experiments of Yu et al. [Science 287 (2000) 637] were a consequence of purification induced oxidative pitting.

Original language	English (US)
Pages (from-to)	128-132
Number of pages	5
Journal	Chemical Physics Letters
Volume	446
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2007.08.033
State	Published - Sep 26 2007
Externally published	Yes

Bibliographical note

Funding Information:
We gratefully acknowledge the grant support from the NASA University Research, Engineering, and Technology Institute on Bio Inspired Materials (BIMat) under Award No. NCC-1-02037.

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abstract = "As previously demonstrated, a single hole is sufficient to markedly reduce the fracture strength of a carbon nanotube (CNT). Herein we present calculations exploring the effects of multiple holes on the modulus, fracture strength, and fracture strain of CNTs. The modulus decreases sharply and approximately linearly as a function of the pitting density. A few holes cause a decrease in the failure strain but extensive pitting leads to higher failure strains. These results suggest that the unusually low modulus measurements and high failure strains reported in the experiments of Yu et al. [Science 287 (2000) 637] were a consequence of purification induced oxidative pitting.",

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AU - Mielke, Steven L.

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AU - Khare, Roopam

AU - Ruoff, Rodney S.

AU - Belytschko, Ted

AU - Schatz, George C.

N1 - Funding Information: We gratefully acknowledge the grant support from the NASA University Research, Engineering, and Technology Institute on Bio Inspired Materials (BIMat) under Award No. NCC-1-02037.

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N2 - As previously demonstrated, a single hole is sufficient to markedly reduce the fracture strength of a carbon nanotube (CNT). Herein we present calculations exploring the effects of multiple holes on the modulus, fracture strength, and fracture strain of CNTs. The modulus decreases sharply and approximately linearly as a function of the pitting density. A few holes cause a decrease in the failure strain but extensive pitting leads to higher failure strains. These results suggest that the unusually low modulus measurements and high failure strains reported in the experiments of Yu et al. [Science 287 (2000) 637] were a consequence of purification induced oxidative pitting.

AB - As previously demonstrated, a single hole is sufficient to markedly reduce the fracture strength of a carbon nanotube (CNT). Herein we present calculations exploring the effects of multiple holes on the modulus, fracture strength, and fracture strain of CNTs. The modulus decreases sharply and approximately linearly as a function of the pitting density. A few holes cause a decrease in the failure strain but extensive pitting leads to higher failure strains. These results suggest that the unusually low modulus measurements and high failure strains reported in the experiments of Yu et al. [Science 287 (2000) 637] were a consequence of purification induced oxidative pitting.

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The effects of extensive pitting on the mechanical properties of carbon nanotubes

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