Modal analysis on nanoclay epoxy-based fiber-glass laminates

This paper focuses on the vibration analysis of fiber glass/epoxy/nanoclay nanocomposites. The modal analysis was performed using a grid of 35 response measurement points. For modes 1 and 7, where the bending-twisting shape mode is observed, the damping coefficient increases by about 27%, on average...

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Bibliographic Details
Published in:Composite structures 2008-05, Vol.83 (3), p.324-333
Main Authors: Ávila, Antonio F., Donadon, Lázaro V., Duarte, Horácio V.
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Exact sciences and technology
Forms of application and semi-finished materials
Fundamental areas of phenomenology (including applications)
Laminates
Modal analysis
Nanocla y
Nanocomposites
Physics
Polymer industry, paints, wood
Solid mechanics
Structural and continuum mechanics
Technology of polymers
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
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Summary:This paper focuses on the vibration analysis of fiber glass/epoxy/nanoclay nanocomposites. The modal analysis was performed using a grid of 35 response measurement points. For modes 1 and 7, where the bending-twisting shape mode is observed, the damping coefficient increases by about 27%, on average. For modes 2 through 6, where bending is noticed, the average increase is around 68%, with peaks of 169%. A new shape mode comes out at 600 Hz frequency when the nanoclay content reaches 2%. A crossing mode, mode 4 with inferior frequency than mode 3, for the 5% and 10% nanoclay content is also observed. For events where high frequencies are generated, the nanoclay content of 2% leads to a higher energy dissipation.
ISSN:0263-8223
1879-1085
DOI:10.1016/j.compstruct.2007.05.003