Experimental and Theoretical Study of High-Energy Dissipation-Viscoelastic Dampers Based on Acrylate-Rubber Matrix
Publication: Journal of Engineering Mechanics
Volume 146, Issue 6
Abstract
Acrylate rubber molecules contain sterically hindered and highly polar ester groups, which can generate a large amount of internal friction energy under external alternating stress and exhibit high internal friction for energy dissipation. Based on previous studies on the formulation of acrylate viscoelastic materials, the optimal formulation was prepared and made into acrylate viscoelastic dampers and the mechanical properties of the corresponding damper specimens were tested. The acrylate viscoelastic dampers at different ambient temperatures, excitation frequencies, and displacement amplitudes were systematically investigated. The experimental results indicate an excellent damping capacity of the acrylate viscoelastic dampers, where the dynamic properties are affected by the ambient temperature and excitation frequency, and the single-loop energy dissipation capacity is significantly affected by the displacement amplitude. To accurately represent the effects of the temperature, frequency, and amplitude on the dynamic properties of the damper, a modified fractional-derivative equivalent model is introduced, where the internal variable theory and temperature-frequency equivalent principle are introduced to reflect the amplitude effect and temperature effect, respectively. Finally, the results calculated by the proposed model were compared with the experimental data, which verified the correctness of the mathematical model.
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Data Availability Statement
Some data and code used during the study are available from the corresponding author by request [List items include: (1) DMA test data for different acrylate viscoelastic materials; (2) Test data for acrylate viscoelastic dampers by servo hydraulic testing machine; and (3) Matlab code used to determine the parameters of the equivalent fraction derivative mechanical model].
Acknowledgments
This study was financially supported by National Key Research and Development Plans with Grant Nos. 2016YFE0119700, 2016YEF0200500, National Science Fund for Distinguished Young Scholars with Grant No. 51625803, National Natural Science Foundation of China with Grant No. 11572088, and the Priority Academic Program Development of Jiangsu Higher Education Institutions, the Program of Chang Jiang Scholars of Ministry of Education.
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Published In
Journal of Engineering Mechanics
Volume 146 • Issue 6 • June 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Jun 5, 2019
Accepted: Feb 12, 2020
Published online: Apr 14, 2020
Published in print: Jun 1, 2020
Discussion open until: Sep 14, 2020
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