Analysis and optimal design for the damping property of laminated viscoelastic plates under general edge conditions

Abstract The present paper is concerned with analysis and optimal design for the damping loss factor of laminated plates under general edge conditions. In the analysis based on the classical lamination theory, the loss factor is deduced from the energy formulation for symmetrically laminated thin plates comprised of fiber reinforced layers and viscoelastic layers. The effects of location and thickness of viscoelastic layers are studied on the loss factor of the plates, and those of the fiber orientation angles are also clarified. In the optimal lay-up design problem, a layerwise optimization (LO) method is applied to the plates comprised of two different orthotropic materials, and the optimal fiber orientation angles are determined to obtain the maximum loss factor in the fundamental mode. These numerical simulation results uncovered that the present approach is quite useful in analyzing and designing the loss factor of the plates.

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