Please use this identifier to cite or link to this item: http://dx.doi.org/10.14279/depositonce-9898
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Main Title: Ratio of Loss and Storage Moduli Determines Restitution Coefficient in Low-Velocity Viscoelastic Impacts
Author(s): Willert, Emanuel
Type: Article
Language Code: en
Abstract: Impact tests are an important tool to analyze dynamic material properties of viscoelastic media in technology and biology. In this context, rigorous contact mechanical models of the collision problem are necessary to adequately interpret data from impact experiments. It is shown here theoretically that the coefficient of restitution in these types of testing is mainly a function of one specific material property, namely, the ratio between the loss and storage moduli of the viscoelastic probe at the characteristic timescale of the impact. Explicit dependencies of the restitution coefficient on factors like impact velocity, impactor shape, general material rheology, and functional grading—beyond the fact that those may influence the impact duration and the dynamic modulus associated with it—are weak.
URI: https://depositonce.tu-berlin.de/handle/11303/11006
http://dx.doi.org/10.14279/depositonce-9898
Issue Date: 25-Feb-2020
Date Available: 23-Apr-2020
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Subject(s): impact testing
restitution
viscoelasticity
rheological models
graded materials
Sponsor/Funder: DFG, 414044773, Open Access Publizieren 2019 - 2020 / Technische Universität Berlin
License: https://creativecommons.org/licenses/by/4.0/
Journal Title: Frontiers in Mechanical Engineering
Publisher: Frontiers Media S.A.
Publisher Place: Lausanne
Volume: 6
Article Number: 3
Publisher DOI: 10.3389/fmech.2020.00003
EISSN: 2297-3079
Appears in Collections:FG Systemdynamik und Reibungsphysik » Publications

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