Influencing of the Pile-Up and the Sink-In by the Coefficient of Friction in the Nanoindentation Test

0548887 - ÚT 2022 RIV CZ eng C - Conference Paper (international conference)
Kovář, J. - Fuis, Vladimír - Čtvrtlík, Radim
Influencing of the Pile-Up and the Sink-In by the Coefficient of Friction in the Nanoindentation Test.
Engineering mechanics 2020. 26th International conference. Book of full texts. Brno: Brno University od Technology, 2020 - (Fuis, V.), s. 298-301. ISBN 978-80-214-5896-3. ISSN 1805-8248.
[International Conference Engineering Mechanics 2020 /26./. Brno (CZ), 24.11.2020-25.11.2020]
Institutional support: RVO:61388998 ; RVO:68378271
Keywords : nanoindentation * pile-up * sink-in * coefficient of friction * FEM
OECD category: Applied mechanics; Materials engineering (FZU-D)
https://www.engmech.cz/2020/im/im/page/proc

The influence of the coefficient of friction between an indenter and a specimen on the height of the pile-up or depth of the sink-in during the nanoindentation test is discussed in this paper. When the indenter is pressed into the hard material, the sink-in behavior causes the bending of the specimen’s surface under the indenter. When the indenter is pressed into the soft material, the deformed material accumulates under the sides of the indenter and makes a pile-up region. The pile-up or sink-in behavior influences the contact area. In this paper, the finite element method was used for calculation of the dependency between the depth of the sink-in or height of the pile-up and the coefficient of friction. The results showed that while there is not any dependency between the friction and the depth of the sink-in, there is a strong dependency between the friction and the height of the pile-up until a specific value of the coefficient of friction. When the pile-up behavior occurs, the friction influences the contact area and should be included into the calculation of the contact area.
Permanent Link: http://hdl.handle.net/11104/0327275