Scratch-tip-size effect and change of friction coefficient in nano / micro scratch tests using XFEM

Compared to the experimental studies, numerical studies on scratch test have been limited due to the difficulty of numerical modeling. Here, we experimentally investigate the scratch-tip-size effect (STSE) based on coefficient of friction (COF) change to make extended finite element (XFE) models con...

Full description

Saved in:
Bibliographic Details
Published in:Tribology international 2018-04, Vol.120, p.398-410
Main Authors: Lee, Kwangmin, Marimuthu, Karuppasamy Pandian, Kim, Chang-Lae, Lee, Hyungyil
Format: Article
Language:English
Subjects:
Coefficient of friction
Elastic recovery
Failure modes
Finite element analysis
Finite element method
Fracture mechanics
Friction
Mathematical models
Scratch test
Scratch tests
Scratch-tip-size effect
Shear strength
Size effects
Soda-lime glass
XFEM
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Compared to the experimental studies, numerical studies on scratch test have been limited due to the difficulty of numerical modeling. Here, we experimentally investigate the scratch-tip-size effect (STSE) based on coefficient of friction (COF) change to make extended finite element (XFE) models considering STSE, COF change, failure modes, yielding strength, shear strength, elastic recovery and pile-up. XFE models are then validated through nano/micro scratch tests on soda-lime glass. Finally, components of COF are extracted and then effects of tensile cracks and parameters of Drucker-Prager model on COF are investigated. We expect that proposed XFE models contribute to the understanding of damage characteristics during the scratch test. [Display omitted] •FE models for nano/micro scratch test on soda-lime glass are proposed.•Scratch-tips of different size cause various failure modes.•Scratch-tip size effect significantly influences friction coefficient change.•Drucker-Prager model of material is calibrated considering indentation size effect.•Components of coefficient of friction are extracted from experiment by using FEM.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2018.01.003