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Observation and numerical simulation of an elastic-plastic solid loaded by a spherical indenter

Published online by Cambridge University Press:  01 December 2004

Naoki Fujisawa ,
Wei Li  and
Michael V. Swain
Naoki Fujisawa*
Affiliation:
School of Physics, University of Sydney, NSW 2006, Australia
Wei Li
Affiliation:
School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, NSW 2006, Australia
Michael V. Swain
Affiliation:
School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, NSW 2006, Australia; and Biomaterials Science Research Unit, Faculty of Dentistry, University of Sydney, United Dental Hospital, Surry Hills, NSW 2010, Australia
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The observation and finite element simulation of Ti–6Al–4V loaded by a spherical indenter were compared. The contact radius at the maximum load was 40% of the indenter radius, which resulted in a high degree of plasticity induced beneath the indenter. The spherical impression profile predicted by the simulation was in agreement with that of the observation. The local curvature of the spherical impression was shown to vary with radial distance. The overall curvature change with radial distance was more distinctive in the presence of static friction. Due to the large plastic zone in the material, neither the Field–Swain nor the Oliver–Pharr method was able to predict the elastic recovery depths in the center of indentation and at the perimeter of contact. The ratio of the two depths predicted by the latter method, however, may be used to verify the applicability of the method itself in determining the elastic modulus of a ductile material.

Keywords

Computer simulationMetalNanoindentation
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 12 , December 2004 , pp. 3474 - 3483
Copyright
Copyright © Materials Research Society 2004

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References

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