Passive vibration reduction of advanced composite pretwisted plates using integral damping materials

John B. Kosmatka; Alex J. Lapid; Oral Mehmed

doi:10.1117/12.208911

5 May 1995 Passive vibration reduction of advanced composite pretwisted plates using integral damping materials

John B. Kosmatka, Alex J. Lapid, Oral Mehmed

Proceedings Volume 2445, Smart Structures and Materials 1995: Passive Damping; (1995) https://doi.org/10.1117/12.208911
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

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.

Citation Download Citation

John B. Kosmatka, Alex J. Lapid, and Oral Mehmed "Passive vibration reduction of advanced composite pretwisted plates using integral damping materials", Proc. SPIE 2445, Smart Structures and Materials 1995: Passive Damping, (5 May 1995); https://doi.org/10.1117/12.208911

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