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http://hdl.handle.net/10397/94251
Title: | On the mechanical β relaxation in glass and its relation to the double-peak phenomenon in impulse excited vibration at high temperatures | Authors: | Wang, J Wang, X Ruan, H |
Issue Date: | 1-Apr-2020 | Source: | Journal of non-crystalline solids, 1 Apr. 2020, v. 533, 119939 | Abstract: | A viscoelastic model is established to reveal the relation between α-β relaxation of glass and the double-peak phenomenon in the experiments of impulse excited vibration. In the modeling, the normal mode analysis (NMA) of potential energy landscape (PEL) picture is employed to describe mechanical α and β relaxations in a glassy material. The model indicates that a small β relaxation can lead to an apparent double-peak phenomenon resulted from the free vibration of a glass beam when the frequency of β relaxation peak is close to the natural frequency of specimen. The theoretical prediction is validated by the acoustic spectrum of a fluorosilicate glass beam excited by a mid-span impulse. Furthermore, the experimental results indicate a negative temperature-dependence of the frequency of β relaxation in the fluorosilicate glass S-FSL5 which can be explained based on the physical picture of fragmented oxide-network patches in liquid-like regions. | Keywords: | Beam vibration Double-peak phenomenon Glass relaxation Viscoelasticity |
Publisher: | Elsevier | Journal: | Journal of non-crystalline solids | ISSN: | 0022-3093 | DOI: | 10.1016/j.jnoncrysol.2020.119939 | Rights: | © 2020 Elsevier B.V. All rights reserved. © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Wang, J., Wang, X., & Ruan, H. (2020). On the mechanical β relaxation in glass and its relation to the double-peak phenomenon in impulse excited vibration at high temperatures. Journal of Non-Crystalline Solids, 533, 119939 is available at https://doi.org/10.1016/j.jnoncrysol.2020.119939. |
Appears in Collections: | Journal/Magazine Article |
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Wang_Mechanical_Relaxation_Glass.pdf | Pre-Published version | 1.84 MB | Adobe PDF | View/Open |
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