Evaluation of Vibration Damping Enhancement in Laminated Aluminum Sheets for Automotive Application

In this research, the vibration damping characteristics of the laminated aluminum sheets (LAS) were evaluated in a sheet specimen and an automotive dash panel and compared with those of the monolithic aluminum sheet (MAS). The LAS was fabricated with two 5xxx series aluminum alloy (AA) sheets (AA505...

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Bibliographic Details
Published in:Materials 2024-09, Vol.17 (17), p.4421
Main Authors: Hong, Jong-Hwa, Park, Hyeonil, Kim, Se-Jong, Kim, Daeyong
Format: Article
Language:English
Subjects:
Adhesives
Aluminum alloys
Aluminum base alloys
Automotive parts
Damping ratio
Frequency response functions
Lasers
Mechanical properties
Metal sheets
Thickness measurement
Vibration
Vibration damping
Vibration measurement
Vibration tests
Viscoelasticity
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Summary:In this research, the vibration damping characteristics of the laminated aluminum sheets (LAS) were evaluated in a sheet specimen and an automotive dash panel and compared with those of the monolithic aluminum sheet (MAS). The LAS was fabricated with two 5xxx series aluminum alloy (AA) sheets (AA5052-O) with a thickness of 0.7 mm by inserting an acryl-based adhesive in between. The automotive dash panels were manufactured by multi-step stamping processes for the LAS and the MAS with a similar thickness. The shaker vibration test in a sheet specimen and the impact hammer test in an automotive dash panel were conducted to measure the frequency response function (FRF) of LAS, compared with those of MAS. The results show that the frequency response function made by the LAS has less noise and fluctuation than that of the MAS in a sheet specimen and an automotive dash panel. The damping ratios in a sheet specimen and an automotive dash panel made by the LAS have higher values than those of the MAS. This proves that the LAS has better vibration damping characteristics and a larger damping effect than the MAS in a sheet specimen and an automotive dash panel.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma17174421