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Modified method developed for contact-induced adhesion in indentation

Published online by Cambridge University Press:  31 January 2011

Yan Xing Shen,
Pal Jen Wei and
Jen Fin Lin
Pal Jen Wei
Affiliation:
Department of Mechanical Engineering, National Cheng Kung University, Tainan 701, Taiwan, Republic of China
Jen Fin Lin*
Affiliation:
Department of Mechanical Engineering, National Cheng Kung University, Tainan 701, Taiwan, Republic of China; Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan, Republic of China; and Institute of Nanotechnology and Microsystems Engineering, National Cheng Kung University Tainan 701, Taiwan, Republic of China
*
a) Address all correspondence to this author. e-mail: jflin@mail.ncku.edu.tw
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Abstract

A modified method for contact-induced adhesion on the elastic deformation contact between a rigid spherical indenter and a polydimethylsiloxane (PDMS) specimen is proposed in the present study. Adhesion due to van der Waals interactions was found to be minimal during loading processes. During the unloading process, the experimental load-displacement data revealed two-stage phenomena. The successive advancing contacts between the specimen and the indenter were considered to induce interfacial adhesion and resulted in elastic tension outside the Hertzian contact radius. A real-coded genetic algorithm (RGA) was applied to evaluate how adhesion energy varied with penetration depth.

Keywords

AdhesionNanoindentationPolymer

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Type
Articles
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Journal of Materials Research , Volume 24 , Issue 5 , May 2009, pp. 1795 - 1802
Copyright
Copyright © Materials Research Society 2009

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