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An integrated method to determine elastic–plastic parameters by instrumented spherical indentation

Published online by Cambridge University Press:  23 April 2014

Chang Yu ,
Yihui Feng ,
Rong Yang ,
Guangjian Peng ,
Zhike Lu  and
Taihua Zhang
Chang Yu
Affiliation:
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
Yihui Feng
Affiliation:
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
Rong Yang
Affiliation:
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
Guangjian Peng
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Zhike Lu
Affiliation:
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
Taihua Zhang*
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

This paper aims to develop an integrated method to extract elastic–plastic parameters from a single instrumented spherical indentation curve. The expression of unloading work is chosen to be combined with the previous work [P. Jiang, T.H. Zhang et al, J. Mater. Res.24(3), 1045 (2009)]. An extensive numerical study was performed to examine the effectiveness of the method. Refitting Jiang's similarity solution based on the numerical study was also performed to simplify the form of the expression and improve the accuracy of the elastic–plastic parameters extracted. The results show that the error of our solution was less than ±5%. We also examined its sensitivity by assessing levels of artificial error introduced into the testing parameters used in the method. These results show that this method can provide reasonable estimates of the elastic–plastic parameters for most common metals.

Keywords

metalselastic modulusplastic propertiesspherical indentation
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 9 , 14 May 2014 , pp. 1095 - 1103
Copyright
Copyright © Materials Research Society 2014 

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References

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