Publication result detail

Finite element analysis of nanoindentation pile-up and correction of projected contact area

KOVÁŘ, J.; FUIS, V.; ČTVRTLÍK, R.; TOMÁŠTÍK, J.

Original Title

Finite element analysis of nanoindentation pile-up and correction of projected contact area

English Title

Finite element analysis of nanoindentation pile-up and correction of projected contact area

Type

Paper in proceedings (conference paper)

Original Abstract

This paper deals with the pile-up phenomenon that can occur during nanoindentation. Finite Element (FE) simulation of X5CrNiCuNb16-4 steel nanoindentation with pyramidal Berkovich indenter was done, and stress and strain beneath the indenter leading to pile-up behavior were analyzed in detail. Pile-up also influences the projected contact area, which should be corrected to include the pile-up into the Oliver-Pharr analysis. Accurate calculation of the projected contact area requires knowledge of its boundary. Few methods of boundary approximation were used, including approximation by the triangle and the semi-ellipse. For more precise approximation, the expression for parabolical approximation was derived. These methods were compared with the projected contact area calculated by finite element method. The most precise results were obtained using semi-elliptical and parabolical correction, which can be used for the determination of the projected contact area and its boundary.

English abstract

This paper deals with the pile-up phenomenon that can occur during nanoindentation. Finite Element (FE) simulation of X5CrNiCuNb16-4 steel nanoindentation with pyramidal Berkovich indenter was done, and stress and strain beneath the indenter leading to pile-up behavior were analyzed in detail. Pile-up also influences the projected contact area, which should be corrected to include the pile-up into the Oliver-Pharr analysis. Accurate calculation of the projected contact area requires knowledge of its boundary. Few methods of boundary approximation were used, including approximation by the triangle and the semi-ellipse. For more precise approximation, the expression for parabolical approximation was derived. These methods were compared with the projected contact area calculated by finite element method. The most precise results were obtained using semi-elliptical and parabolical correction, which can be used for the determination of the projected contact area and its boundary.

Keywords

nanoindentation, Berkovich indenter, pile-up, parabolical correction, steel, finite element method

Key words in English

nanoindentation, Berkovich indenter, pile-up, parabolical correction, steel, finite element method

Authors

KOVÁŘ, J.; FUIS, V.; ČTVRTLÍK, R.; TOMÁŠTÍK, J.

Released

17.12.2024

Publisher

Czech Technical University in Prague

Location

Praha

ISBN

9788001073865

Book

Acta Polytechnica CTU Proceedings

ISBN

2336-5382

Periodical

Acta Polytechnica CTU Proceedings

Volume

50

State

Czech Republic

Pages from

18

Pages to

23

Pages count

6

URL

https://ojs.cvut.cz/ojs/index.php/APP/article/view/10356

BibTex

@inproceedings{BUT197035,
  author="Jaroslav {Kovář} and Vladimír {Fuis} and Radim {Čtvrtlík} and Jan {Tomáštík}",
  title="Finite element analysis of nanoindentation pile-up and correction of projected contact area",
  booktitle="Acta Polytechnica CTU Proceedings",
  year="2024",
  journal="Acta Polytechnica CTU Proceedings",
  volume="50",
  number="50",
  pages="18--23",
  publisher="Czech Technical University in Prague",
  address="Praha",
  doi="10.14311/APP.2024.50.0018",
  isbn="9788001073865",
  url="https://ojs.cvut.cz/ojs/index.php/APP/article/view/10356"
}