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Proceedings Paper

Passive vibration reduction of advanced composite pretwisted plates using integral damping materials
Author(s): John B. Kosmatka; Alex J. Lapid; Oral Mehmed
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Paper Abstract

An analytical procedure to incorporate viscoelastic damping into advanced composite bladed structures is described. A constrain layer damping technique is used to damp out specific modes in a cantilevered pre-twisted plate. A viscoelastic material, 3M Scotchdamp ISD 113 (ISD113), is placed in a small pocket at a specified location within the plate to isolate the damping of a particular vibration frequency. Analytical and experimental results are presented for a flat and pretwisted plate with the [O2/+0/-02/+0/O2/ISD113-border material]s lay-up. The results show that for a given patch size of the ISD113 the location can have a significant effect on the damping level and only a negligible effect on the structural stiffness. The results also show that the border material can be varied in such a way as to increase the damping level with only a slight decrease in the structure's natural frequency.

Paper Details

Date Published: 5 May 1995
PDF: 12 pages
Proc. SPIE 2445, Smart Structures and Materials 1995: Passive Damping, (5 May 1995); doi: 10.1117/12.208911
Show Author Affiliations
John B. Kosmatka, Univ. of California/San Diego (United States)
Alex J. Lapid, Univ. of California/San Diego (United States)
Oral Mehmed, NASA Lewis Research Ctr. (United States)

Published in SPIE Proceedings Vol. 2445:
Smart Structures and Materials 1995: Passive Damping
Conor D. Johnson, Editor(s)

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