Název: Finite element analysis of nanoindentation pile-up and correction of projected contact area
Autoři: Kovář, J. ; Fuis, V. ; Čtvrtlík, Radim ; Tomáštík, Jan
Typ dokumentu: Příspěvky z konference
Konference/Akce: International Conference on Local Mechanical Properties /16./ LMP 2024, Prague (CZ), 20240529
Rok: 2024
Jazyk: eng
Abstrakt: 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.
Klíčová slova: Berkovich indenter; finite element method; Nanoindentation; parabolical correction; pile-up; steel
Číslo projektu: EH22_008/0004596
Poskytovatel projektu: GA MŠk
Zdrojový dokument: Acta Polytechnica CTU Proceedings, ISBN 978-80-01-07386-5, ISSN 2336-5382
Poznámka: Související webová stránka: https://ojs.cvut.cz/ojs/index.php/APP/article/view/10356/7297

Instituce: Fyzikální ústav AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: https://hdl.handle.net/11104/0367014

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-680002