Journal article
Damping analysis of cylindrical composite structures with enhanced viscoelastic properties
Department of Mechanical Engineering, Technical University of Denmark1
Solid Mechanics, Department of Mechanical Engineering, Technical University of Denmark2
Ghent University3
Technische Universität Dresden4
Leichtbau-Zentrum Sachsen GmbH5
Polytechnique Montreal6
Villum Center for Advanced Structural and Material Testing, Centers, Technical University of Denmark7
Constrained layer damping treatments are widely used in mechanical structures to damp acoustic noise and mechanical vibrations. A viscoelastic layer is thereby applied to a structure and covered by a stiff constraining layer. When the structure vibrates in a bending mode, the viscoelastic layer is forced to deform in shear mode.
Thus, the vibration energy is dissipated as low grade frictional heat. This paper documents the efficiency of passive constrained layer damping treatments for low frequency vibrations of cylindrical composite specimens made of glass fibre-reinforced plastics. Different cross section geometries with shear webs have been investigated in order to study a beneficial effect on the damping characteristics of the cylinder.
The viscoelastic damping layers are placed at different locations within the composite cylinder e.g. circumferential and along the neutral plane to evaluate the location-dependent efficiency of constrained layer damping treatments. The results of the study provide a thorough understanding of constrained layer damping treatments and an improved damping design of the cylindrical composite structure.
The highest damping is achieved when placing the damping layer in the neutral plane perpendicular to the bending load. The results are based on free decay tests of the composite structure.
Language: | English |
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Publisher: | Springer Netherlands |
Year: | 2019 |
Pages: | 85-113 |
Journal subtitle: | An International Journal for the Science and Application of Composite Materials |
ISSN: | 15734897 and 0929189x |
Types: | Journal article |
DOI: | 10.1007/s10443-018-9684-2 |
ORCIDs: | Kliem, Mathias , Høgsberg, Jan Becker and Berggreen, Christian |