Mechanics of Indentation into Micro- and Nanoscale Forests of Tubes, Rods, or Pillars
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Boyce_Mechanics on indentation.pdf
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654.49 KB
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Author(s)
Wang, Lifeng
Ortiz, Christine
Boyce, Mary Cunningham
Date Issued
December 2010
Journal
Journal of Engineering Materials and Technology
Publisher
ASME International
Citation
Wang, Lifeng, Christine Ortiz, and Mary C. Boyce. “Mechanics of Indentation into Micro- and Nanoscale Forests of Tubes, Rods, or Pillars.” Journal of Engineering Materials and Technology 133.1 (2011): 011014. ©2011 American Society of Mechanical Engineers
Version
Final published version
Abstract
The force-depth behavior of indentation into fibrillar-structured surfaces such as those consisting of forests of micro- or nanoscale tubes or rods is a depth-dependent behavior governed by compression, bending, and buckling of the nanotubes. Using a micromechanical model of the indentation process, the effective elastic properties of the constituent tubes or rods as well as the effective properties of the forest can be deduced from load-depth curves of indentation into forests. These studies provide fundamental understanding of the mechanics of indentation of nanotube forests, showing the potential to use indentation to deduce individual nanotube or nanorod properties as well as the effective indentation properties of such nanostructured surface coatings. In particular, the indentation behavior can be engineered by tailoring various forest features, where the force-depth behavior scales linearly with tube areal density (m, number per unit area), tube moment of inertia (I), tube modulus (E), and indenter radius (R) and scales inversely with the square of tube length (L[superscript 2]), which provides guidelines for designing forests whether to meet indentation stiffness or for energy storage applications in microdevice designs.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1115/1.4002648
