Vibration Suppression of Thin-Walled Composite Tubes Using Embedded Viscoelastic Layers

Item

Title
Vibration Suppression of Thin-Walled Composite Tubes Using Embedded Viscoelastic Layers
Report Number
WL-TR-91-3078 Volume III, p. HAC-1 thru HAC-16
Creator
Belknap, Frank M.
Kosmatka, J. B.
Corporate Author
Department of Applied Mechanics and Engineering Science, University of California
Date
1991
Date Issued
1991-08
Extent
16
Identifier
AD241313
Format
1 online resource
Abstract
This paper documents the design and fabrication of a thin-walled composite tube consisting of inner and outer graphite shells with a viscoelastic layer between the shells to provide damping. The graphite shells are fabricated
from fabric and unidirectional tape with ply orientations that cause the shells to counter-rotate in opposite directions when subjected to bending or extension. The counter-rotation of inner and outer shells provides a large
shear area at the viscoelastic layer, therefore optimizing the damping.
Stiffness characteristics of a laminated tube are used to determine ply
orientations to maximize damping and structural stiffness. Details of the
tube construction are described along with design issues of incorporating
viscoelastic layers in a composite laminate. Tests results of the tube with an
embedded viscoelastic layer are compared to those of a tube constructed
from the same laminate without the damping layer.
Description
This paper documents the design and fabrication of a thin-walled composite tube consisting of inner and outer graphite shells with a viscoelastic layer between the shells to provide damping. The graphite shells are fabricated
from fabric and unidirectional tape with ply orientations that cause the shells to counter-rotate in opposite directions when subjected to bending or extension. The counter-rotation of inner and outer shells provides a large
shear area at the viscoelastic layer, therefore optimizing the damping. Stiffness characteristics of a laminated tube are used to determine ply orientations to maximize damping and structural stiffness. Details of the tube construction are described along with design issues of incorporating viscoelastic layers in a composite laminate. Tests results of the tube with an embedded viscoelastic layer are compared to those of a tube constructed from the same laminate without the damping layer.
Distribution Classification
1
Distribution Conflict
No
DTIC Record Exists
No
Illinois Tech Related
No
Photo Quality
Not Needed
Report Availability
Full text available
Type
article
Is Part Of
Proceedings of Damping '91: 13-15 February 1991 San Diego, California (GCA-1 through JCB-17)
Media
articleHAC

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Items with "Has Part: Vibration Suppression of Thin-Walled Composite Tubes Using Embedded Viscoelastic Layers"
Title Class
Proceedings of Damping '91: 13-15 February 1991 San Diego, California (GCA-1 through JCB-17)

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