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Spherical indentation of a finite poroelastic coating

Appl. Phys. Lett. 93, 031911 (2008); doi:10.1063/1.2957993

Published 23 July 2008

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M. Galli and M. L. Oyen
Engineering Department, Cambridge University, Trumpington Street, Cambridge CB2 1PZ, United Kingdom
Indentation testing of a finite poroelastic layer is considered. Finite element modeling was used to investigate spherical contact creep tests, with emphasis on the influence of layer thickness and of finite rise time on the time-dependent deformation. Thin layers are stiffened by the substrate constraint even at very small relative indenter penetrations and reach steady state more quickly than thick layers. The degree of consolidation following loading is affected by the interaction of layer thickness and rise time and cannot be predicted from either alone. These results provide guidance for micro- and nanoindentation testings of hydrogel coatings for biomedical applications. ©2008 American Institute of Physics
History: Received 24 April 2008; accepted 17 June 2008; published 23 July 2008
Permalink: http://link.aip.org/link/?APPLAB/93/031911/1
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KEYWORDS and PACS

Keywords
PACS
  • 81.40.Np
    Fatigue, embrittlement, fracture and failure
  • 62.20.M-
    Structural failure of materials
  • 81.40.Jj
    Elasticity and anelasticity, stress-strain relations
  • 62.20.D-
    Elasticity of solids
  • 81.70.Bt
    Mechanical testing, impact tests, static and dynamic loads
  • 81.40.Lm
    Deformation, plasticity, and creep
  • 62.20.F-
    Deformation and plasticity of solids
  • YEAR: 2008

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
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REFERENCES (16)
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