Continuum modeling of large-strain deformation modes in gold nanowires

Metallic nanostructures and specifically nanowires can be used for technological breakthroughs. Experimental measurements have provided insights on the mechanical properties of metallic nanostructures. In conjunction, modeling analyses provide an understanding of the underlying deformation and stren...

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Bibliographic Details
Published in:Journal of materials research 2011-09, Vol.26 (17), p.2286-2292
Main Authors: Rezvanian, Omid, Zikry, Mohammed A.
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Bending stresses
Biomaterials
Continuum modeling
Crystals
Defects
Deformation
Gold
Inorganic Chemistry
Materials Engineering
Materials research
Materials Science
Nanotechnology
Nanowires
Simulation
Single crystals
Strain hardening
Velocity
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Summary:Metallic nanostructures and specifically nanowires can be used for technological breakthroughs. Experimental measurements have provided insights on the mechanical properties of metallic nanostructures. In conjunction, modeling analyses provide an understanding of the underlying deformation and strengthening mechanisms in nanostructures. Most modeling studies on nanostructures are based on atomistic and molecular dynamics simulations, and though invaluable, they are limited to nanoscale dimensions of a few tens of nanometers, at small temporal scales, and physically unrealistic strain rates. Furthermore, most of the current applications for free-standing metallic nanostructures require high aspect ratios with at least one dimension greater than a few hundred nanometers. A continuum microstructurally based approach can, therefore, provide insights on design of one-dimensional nanowires on a physically relevant scale. Hence, we use a multiple-slip crystal plasticity formulation that is adapted to single crystal gold nanowires to simulate the experimental setup for a two-end fixed nanowire subjected to bending.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2011.148