Open AccessAn analytical and experimental study on dampening material effects on the dynamic behavior of free-free aluminum sheets
Author(s) -
R. Khorasani,
S.A. Hosseini Kordkheili,
Hadi Parviz
Publication year - 2021
Publication title -
engineering solid mechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 17
eISSN - 2291-8752
pISSN - 2291-8744
DOI - 10.5267/j.esm.2021.1.002
Subject(s) - viscoelasticity , materials science , vibration , coating , loss factor , dynamic modulus , structural engineering , modal analysis , aluminium , composite material , shear modulus , layer (electronics) , modal , work (physics) , dynamic mechanical analysis , acoustics , mechanical engineering , engineering , physics , polymer , optoelectronics , dielectric
This work aims to present an experimentally verified analytical solution to examine damping properties of systems including viscoelastic treatments. Although there are several methods for characterizing the behavior of three-layer damping systems, the RKU method is the most frequently used one. In this paper, this method is modified such a way that to be applied for a five-layer damping system. The achieved analytical relations are then employed to study the effects of a four-layer vibration-absorbing coating on the dynamic behavior of an aluminum sheet with free-free boundary conditions. Since the vibration-damping properties of the coating are unknowns, its loss factor and shear modulus are experimentally extracted based on the ASTM E756-05 standard method. The comparison between the analytical solution and performed modal tests expresses the efficiency of the presented method.