Using analytical and finite element modeling, we examine the relationships between initial unloading slope, contact depth, and mechanical properties for spherical indentation in viscoelastic solids with either displacement or load as the independent variable. We then investigate whether the Oliver-Pharr method for determining the contact depth and contact radius, originally proposed for indentation in elastic and elastic-plastic solids, is applicable to spherical indentation in viscoelastic solids. Finally, the analytical and numerical results are used to answer questions raised in recent literature about measuring viscoelastic properties from instrumented spherical indentation experiments.
|Number of pages||7|
|Journal||Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing|
|State||Published - Nov 15 2005|
Bibliographical noteFunding Information:
The authors would like to thank Wangyang Ni, Mike Lukitsch, Yue Qi, Tom Perry, and Wes Capehart, Lou Hector, and Mark W. Verbrugge for valuable discussions. C.-M. Cheng would like to acknowledge partial support from NSF of China, Project No. 10372101.
- Contact mechanics
- Finite element
- Mechanical properties
ASJC Scopus subject areas
- Materials Science (all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering