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Insights on uniaxial compression of WS2 inorganic fullerenes: A finite element study

Published online by Cambridge University Press:  15 August 2011

Estelle Kalfon-Cohen ,
David Barlam ,
Ofer Tevet  and
Sidney R. Cohen
Estelle Kalfon-Cohen
Affiliation:
Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
David Barlam
Affiliation:
Department of Mechanical Engineering, Ben Gurion University of the Negev, Beer Sheva 84105, Israel
Ofer Tevet
Affiliation:
Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
Sidney R. Cohen*
Affiliation:
Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
*
a)Address all correspondence to this author. e-mail: sidney.cohen@weizmann.ac.il
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Abstract

We report here a finite element simulation of the compression of inorganic WS2 hollow nanoparticles. The particle was modeled as a multilayered polyhedron to investigate the effect of the unique onion-like and highly faceted structure in the mechanical response. The simulation revealed the central role of the faceted structure of the WS2 nanoparticles in the mode of failure. The stress magnitude and distribution was shown to be size dependent, as predicted from previously published experimental results. Moreover, the simulation points to the influence of the layered structure on the energy release during compression loading via interlayer shear.

Keywords

NanoindentationNanostructureStress/strain relationship

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Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 1: Focus Issue: Instrumented Indentation , 14 January 2012 , pp. 161 - 166
Copyright
Copyright © Materials Research Society 2011

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References

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