OPTIMAL CONSTRAINED VISCOELASTIC TAPE LENGTHS FOR MAXIMIZING DAMPING IN LAMINATED COMPOSITES

被引：39

作者：

MANTENA, PR ^{[1
]}

GIBSON, RF ^{[1
]}

HWANG, SJ ^{[1
]}

机构：

[1] WAYNE STATE UNIV,DEPT MECH ENGN,DETROIT,MI 48202

来源：

AIAA JOURNAL | 1991年 / 29卷 / 10期

关键词：

D O I：

10.2514/3.10790

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

The results of experimental investigations conducted on glass/epoxy and graphite/epoxy composite laminated beams with constrained layer surface-damping treatments are reported. A fast Fourier transform based impulse technique is used for identifying an optimal length of damping tape to be applied for maximizing the structural loss factor. This requirement stems from a need (as in helicopter rotor blade applications) for a tradeoff between the added weight of the viscoelastic layer and the resultant changes in the dynamic characteristics of the structure. The experimental data is compared with analytical results obtained by a modal strain energy/three-dimensional finite element method. This study has shown that, for a given composite structure and boundary conditions, there exists an optimum length of the constraining layer that produces maximum shear strain energy of the intermediate viscoelastic layer, thus providing maximum damping. Boundary conditions are also shown to have a strong influence on the system damping.

引用

页码：1678 / 1685

页数：8

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