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Proceedings Paper

Smart tailoring of hybrid composite laminates with improved dynamic response
Author(s): Hirotoshi Okazaki; Vijayan Baburaj; Tatsuzo Koga
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Paper Abstract

Dynamic damping analysis study of hybrid composite laminated plate structures and their tailoring aspects to enhance dynamic behavior have been discussed in this paper. The present analytical formulation is based on an integrated approach in which the lamina level micromechanics based theory is combined with a higher-order transverse shear deformable plate theory to predict the equivalent material specific damping capacity (SDC) of a general hybrid composite laminated plate structure. The micromechanical equations based on a self-consistent stress method are used for the calculation of elastic stiffness and SDC at the lamina level. As a typical example, the solution procedures of a steady state dynamic characteristics including the modal SDC of a rectangular laminated plate simply-supported on all the four edges have also been discussed. Specifically, our aim is to evaluate the effects of fiber orientation and the volume fraction of the hybridizing fiber on the dynamic behavior such as, flexural vibration frequencies and the modal SDC of the laminated plate. In order to get a basic understanding about the various tailoring aspects, a parametric optimization was done to get the appropriate fiber volume fractions of hybrid composite to achieve a balanced dynamic performance involving both resonance frequency and modal SDC. Numerical results are furnished for a typical Carbon/E-Glass fiber hybrid composite laminated plate to understand the above mentioned effects. It has been observed that the fiber orientation has a strong influence in controlling the SDC of laminated plate similar to those of the natural frequencies of the plate. The modal SDC of the first three modes indicates that the trend of the SDC variation with respect to laminate fiber angle is in a reversed manner as those of the natural frequencies.

Paper Details

Date Published: 16 April 1998
PDF: 13 pages
Proc. SPIE 3321, 1996 Symposium on Smart Materials, Structures, and MEMS, (16 April 1998); doi: 10.1117/12.305608
Show Author Affiliations
Hirotoshi Okazaki, Univ. of Tsukuba (Japan)
Vijayan Baburaj, Univ. of Tsukuba (Japan)
Tatsuzo Koga, Univ. of Tsukuba (Japan)

Published in SPIE Proceedings Vol. 3321:
1996 Symposium on Smart Materials, Structures, and MEMS
Vasu K. Aatre; Vijay K. Varadan; Vasundara V. Varadan, Editor(s)

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