Journal
TRIBOLOGY INTERNATIONAL
Volume 120, Issue -, Pages 398-410Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2018.01.003
Keywords
Scratch-tip-size effect; Coefficient of friction; Scratch test; XFEM
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Funding
- Basic Science Research Programs through the National Research Foundation of Korea [NRF-2015R1A2A1A 15056163, NRF-2017R1A2B3009706]
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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.
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