Please use this identifier to cite or link to this item: doi:10.22028/D291-33448
Title: Modeling Adhesive Hysteresis
Author(s): Wang, Anle
Zhou, Yunong
Müser, Martin H.
Language: English
Title: Lubricants
Volume: 9
Issue: 2
Publisher/Platform: MDPI
Year of Publication: 2021
Free key words: adhesion
cohesive zone model
DDC notations: 500 Science
Publikation type: Journal Article
Abstract: When an elastomer approaches or retracts from an adhesive indenter, the elastomer’s surface can suddenly become unstable and reshape itself quasi-discontinuously, e.g., when smallscale asperities jump into or snap out of contact. Such dynamics lead to a hysteresis between approach and retraction. In this study, we quantify numerically and analytically the ensuing unavoidable energy loss for rigid indenters with flat, Hertzian and randomly rough profiles. The range of adhesion turns out to be central, in particular during the rarely modeled approach to contact. For example, negligible traction on approach but quite noticeable adhesion for nominal plane contacts hinges on the use of short-range adhesion. Central attention is paid to the design of cohesive-zone models for the efficient simulation of dynamical processes. Our study includes a Griffith’s type analysis for the energy lost during fracture and regeneration of a flat interface. It reveals that the leading-order corrections of the energy loss are due to the finite-range adhesion scale at best, with the third root of the linear mesh size, while leading-order errors in the pull-off force disappear linearly.
DOI of the first publication: 10.3390/lubricants9020017
Link to this record: urn:nbn:de:bsz:291--ds-334480
ISSN: 2075-4442
Date of registration: 1-Mar-2021
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Martin Müser
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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