Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6921
Title: A systematic study of the validation of Oliver and Pharr’s method
Authors: Shu, S
Lu, J
Li, D
Keywords: Elastic moduli
Elasticity
Error analysis
Error correction
Plasticity
Strain hardening
Yield stress
Issue Date: Dec-2007
Publisher: Cambridge University Press
Source: Journal of materials research, Dec. 2007, v. 22, no. 12, p. 3385-3396 How to cite?
Journal: Journal of materials research 
Abstract: Oliver and Pharr’s method (O&P’s method) is an efficient and popular way of measuring the hardness and Young’s modulus of many classes of solid materials. However, there exists a range of errors between the real values and the calculated values when O&P’s method is applied to materials not included in the basic assumption proposed initially. In this article, the dimensional analysis theorem and the finite element method are applied to evaluate errors for high elastic (E/σ[sub Y]→5) to full plastic (E/σ[sub Y] →1000) materials with different strain-hardening exponents from 0 to 0.5. A new method is proposed to correct errors obtained using O&P’s method. The numerical simulation results show that the errors obtained using O&P’s method, given in the form of charts, are mainly dependent on the ratio of the reduced Young’s modulus to the yield stress (i.e., E[sub r]/σ[sub Y]) and the strain-hardening exponent, n, for an indenter with a fixed included angle. The two mechanical properties, which can be extracted from the load–depth curves of two indenters with different included angles, are used to correct the errors in the hardness and Young’s modulus of the indented materials produced by O&P’s method.
URI: http://hdl.handle.net/10397/6921
ISSN: 0884-2914
EISSN: 2044-5326
Rights: © 2007 Materials Research Society The following article "Siqi Shu, Jian Lu and Dongfeng Li (2007). A systematic study of the validation of Oliver and Pharr’s method. Journal of Materials Research, 22(12), pp 3385-3396. doi:10.1557/JMR.2007.0428." is available at http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=7953970
Appears in Collections:Journal/Magazine Article

Files in This Item:
File Description SizeFormat 
Lu_Validation_Oliver_Pharr.pdf725.12 kBAdobe PDFView/Open
Access
View full-text via PolyU eLinks SFX Query
Show full item record
PIRA download icon_1.1View/Download Contents

SCOPUSTM   
Citations

8
Last Week
0
Last month
0
Citations as of Aug 20, 2018

WEB OF SCIENCETM
Citations

7
Last Week
0
Last month
0
Citations as of Aug 19, 2018

Page view(s)

104
Last Week
0
Last month
Citations as of Aug 14, 2018

Download(s)

125
Citations as of Aug 14, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.