Abstract
Using analytical and finite element modeling, we studied conical indentation in linear viscoelastic solids with either displacement or load as the independent variable. We examine the relationships between initial unloading slope, contact depth, and viscoelastic properties for various loading conditions such as constant displacement rate, constant loading rate, and constant indentation strain rate. We then discuss whether the Oliver-Pharr method for determining contact depth, originally proposed for indentation in elastic and elastic-plastic solids, is applicable to indentation in viscoelastic solids. We conclude with a few comments about two commonly used experimental procedures for indentation measurements in viscoelastic solids: the "hold-at-peak-load" technique and the constant indentation strain-rate method.
| Original language | English |
|---|---|
| Pages (from-to) | 1046-1053 |
| Number of pages | 8 |
| Journal | Journal of Materials Research |
| Volume | 20 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2005 |
Bibliographical note
Funding Information:The authors would like to thank Wangyang Ni, Mike Lukitsch, Yue Qi, Tom Perry, Wes Capehart, Lou Hector, and Mark W. Verbrugge for valuable discussions. C-M. Cheng would like to acknowledge partial support from the National Science Foundation of China, Project No. 10372101.
Funding
The authors would like to thank Wangyang Ni, Mike Lukitsch, Yue Qi, Tom Perry, Wes Capehart, Lou Hector, and Mark W. Verbrugge for valuable discussions. C-M. Cheng would like to acknowledge partial support from the National Science Foundation of China, Project No. 10372101.
| Funders | Funder number |
|---|---|
| National Natural Science Foundation of China (NSFC) | 10372101 |
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering