Influence of surface stress on elastic constants of nanohoneycombs

Chen, Qiang, Pugno, Nicola, & Li, Zhiyong (2013) Influence of surface stress on elastic constants of nanohoneycombs. Physica E-Low-Dimensional Systems & Nanostructures, 53, pp. 217-222.

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Abstract

Surface effect on the four independent elastic constants of nanohoneycombs is investigated in this paper. The axial deformation of the horizontal cell wall is included, comparing to the Gibson's method, and the contributions of the two components of surface stress (i.e. surface residual stress and surface elasticity) are discussed. The result shows that the regular hexagonal honeycomb is not isotropic but orthotropic. An increase in the cell-wall thickness t leads to an increase in the discrepancy of the Young's moduli in both directions. Furthermore, the surface residual stress dominates the surface effect on the elastic constants when t < 15 nm (or the relative density <0.17), which is in contrast to that the surface elasticity does when t > 15 nm (or the relative density > 0.17) for metal Al. The present structure and theory may be useful in the design of future nanodevices.

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3 citations in Web of Science®

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ID Code: 90298
Item Type: Journal Article
Refereed: Yes
Keywords: Nanohoneycomb, Surface effect, Elastic constants, thin-films, nanowires, strength, behavior
DOI: 10.1016/j.physe.2013.05.001
ISSN: 1873-1759
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Elsevier B.V.
Deposited On: 19 Nov 2015 01:31
Last Modified: 07 Dec 2015 05:47

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