Please use this identifier to cite or link to this item: http://dx.doi.org/10.14279/depositonce-11016
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Main Title: Non-adhesive Contacts With Different Surface Tension Inside and Outside the Contact Area
Author(s): Li, Qiang
Popov, Valentin L.
Type: Article
Language Code: en
Abstract: In the past decade, the influence of surface tension on contact properties has attracted much attention, especially in the context of contact of very soft materials (such as gels) or contacts at the nanoscale. However, in the most current studies it is assumed that the tension of the surface inside and outside the contact area is the same. In practical terms, this means that the object considered is an elastic body “coated” with a tensed membrane. In real contacts, there is no reason why the surface tensions of the “free interface” and the “contact interface” should be equal. On the contrary, especially in contacts of soft bodies with hard solid indenters, one can anticipate that they are completely different. In the present article, we consider an elastic contact taking into account different surface tensions inside and outside the contact area. However, the considered contacts are still “non-adhesive.” This means that the three surface energies in play (two surface energies of both bodies outside the contact and the interface energy in the contact region) fulfill the criterion that the work of separation vanishes. A numerical model based on the Fast Fourier transform–assisted boundary element method is implemented and is illustrated with a few examples.
URI: https://depositonce.tu-berlin.de/handle/11303/12142
http://dx.doi.org/10.14279/depositonce-11016
Issue Date: 2-Sep-2020
Date Available: 8-Dec-2020
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Subject(s): boundary element method
contact angle
contact mechanics
elastocapillary length
surface tension
Sponsor/Funder: TU Berlin, Open-Access-Mittel – 2020
License: https://creativecommons.org/licenses/by/4.0/
Journal Title: Frontiers in Mechanical Engineering
Publisher: Frontiers
Publisher Place: Lausanne
Volume: 6
Article Number: 63
Publisher DOI: 10.3389/fmech.2020.00063
EISSN: 2297-3079
Appears in Collections:FG Systemdynamik und Reibungsphysik » Publications

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