Detail publikace
The discrepancy between the indentation curves obtained by the finite element method calculation with a Berkovich and a conical indenter
KOVÁŘ, J. FUIS, V. ČTVRTLÍK, R. TOMÁŠTÍK, J.
Anglický název
The discrepancy between the indentation curves obtained by the finite element method calculation with a Berkovich and a conical indenter
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
Nanoindentation is an experimental technique used for the determination of Young modulus. The commonly used Oliver-Pharr analysis based on the assumption of the equivalence of indentation curves obtained with a Berkovich and a conical indenter is employed. Nevertheless, a break-down of this equivalence in projected area between the pyramidal and conical geometry was found. This discrepancy leads to an overestimation of Young modulus and needs to be corrected with coefficient β. It corrects the difference between Young modulus from the conical and the Berkovich indentation but cannot correct the indentation curves. This paper aims at the FEM study of modelling of the nanoindentation test, the influence of the Oliver-Pharr analysis assumptions, the comparison and unification of the different values of β for the Berkovich and the conical indentation with a rigid and a diamond indenter, the correction of the indentation curves, and the explanation of the differences between the FEM calculated and experimentally measured indentation curves.
Anglický abstrakt
Nanoindentation is an experimental technique used for the determination of Young modulus. The commonly used Oliver-Pharr analysis based on the assumption of the equivalence of indentation curves obtained with a Berkovich and a conical indenter is employed. Nevertheless, a break-down of this equivalence in projected area between the pyramidal and conical geometry was found. This discrepancy leads to an overestimation of Young modulus and needs to be corrected with coefficient β. It corrects the difference between Young modulus from the conical and the Berkovich indentation but cannot correct the indentation curves. This paper aims at the FEM study of modelling of the nanoindentation test, the influence of the Oliver-Pharr analysis assumptions, the comparison and unification of the different values of β for the Berkovich and the conical indentation with a rigid and a diamond indenter, the correction of the indentation curves, and the explanation of the differences between the FEM calculated and experimentally measured indentation curves.
Klíčová slova anglicky
nanoindentation, computing, elastic properties, fused silica, Ni
Vydáno
09.05.2022
Nakladatel
Springer
Místo
Heidelberg, Germany
ISSN
0884-2914
Ročník
37
Číslo
10
Strany od–do
1750–1761
Počet stran
12
BIBTEX
@article{BUT177915,
author="Jaroslav {Kovář} and Vladimír {Fuis} and Radim {Čtvrtlík} and Jan {Tomáštík},
title="The discrepancy between the indentation curves obtained by the finite element method calculation with a Berkovich and a conical indenter",
year="2022",
volume="37",
number="10",
month="May",
pages="1750--1761",
publisher="Springer",
address="Heidelberg, Germany",
issn="0884-2914"
}