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Size-Dependent Elastic Moduli of FCC Crystal Nanofilms

Published online by Cambridge University Press:  01 February 2011

Shih-Hsiang Chang  and
I-Ling Chang
Shih-Hsiang Chang
Affiliation:
shchang@cc.fec.edu.tw, Far East College, Mechanical Engineering, 49, Chung-Hwa Road, Hsin-Shih, Tainan, N/A, 744, Taiwan, 886-6-5977511, 886-6-5977970
I-Ling Chang
Affiliation:
imeilc@ccu.edu.tw, National Chung Cheng University, Department of Mechanical Engineering, Chia-Yi, N/A, 621, Taiwan
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Abstract

A semi-continuum model is constructed to study the size effects on the mechanical properties of face-cubic-center crystal structure nanofilms. Unlike the classical continuum theory, the current model directly takes the discrete nature in the thickness direction into consideration. In-plane and out-plane Poisson's ratios as well as in-plane Young's modulus are investigated with this model. It is found that the values of the Young's modulus and Poisson's ratio depend on the film thickness and approach the respective bulk values asymptotically.

Keywords

elastic propertiesfilmnanoscale
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 924: Symposium Z – Mechanics of Nanoscale Materials and Devices , 2006 , 0924-Z03-22
Copyright
Copyright © Materials Research Society 2006

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