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Effect of surface elasticity on the elastic response of nanoporous gold
Citation Link: https://doi.org/10.15480/882.1682
Publikationstyp
Journal Article
Date Issued
2017-06-29
Sprache
English
Author(s)
TORE-DOI
Volume
7
Issue
4
Article Number
04017013
Citation
Journal of Nanomechanics and Micromechanics 4 (7): 04017013 (2017-06-29)
Publisher DOI
Scopus ID
Publisher
ASCE
In this work, the effect of surface elasticity on the effective elastic properties of nanoporous gold is studied. To this end, a theoretical framework for surface elasticity effects in submicron-sized solids is implemented as a user-defined finite element subroutine. This allows the use of the theory in large-scale engineering problems. The theory suggests a zero-thickness surface accommodating unique energetic properties and surface tension. For the example of ball-and-stick diamond cubic unit cell structures for nanoporous gold, it is shown
that incorporation of surface excess elasticity and surface tension allows prediction of the size effect associated with the change of the surface area-to-volume ratio by capturing, e.g., the increase in the effective Young’s modulus and decrease in the effective Poisson’s ratio with decreasing ligament diameter, a phenomenon that is not accessible to classical continuum elasticity approaches.
that incorporation of surface excess elasticity and surface tension allows prediction of the size effect associated with the change of the surface area-to-volume ratio by capturing, e.g., the increase in the effective Young’s modulus and decrease in the effective Poisson’s ratio with decreasing ligament diameter, a phenomenon that is not accessible to classical continuum elasticity approaches.
DDC Class
600: Technik
620: Ingenieurwissenschaften
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%28ASCE%29NM.2153-5477.0000126.pdf
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1.16 MB
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