Abstract
The purpose of this study is to obtain the maximum loss factor of the embedded co-cure damping composite structure with the boundary condition of four edges clamped. To achieve this goal, the strain energy of each stress component is deduced using the Ritz method, and the loss factor of the structure is calculated. The present formulation is validated based on the results obtained using the finite element method. Finally, the law of loss factor variation with the change in structure thickness and layup angle is obtained. The results obtained show that the loss factor of the structure increases as the thickness of the structure increases; when the total thickness of the structure is constant, the loss factor increases first and then decreases, and there is an optimal value for the design; the optimal lay angle is pi/4.
Highlights
The impact of vibrations, shocks, and noise environments cannot be overlooked with respect to the development of new satellites, aircraft, underwater nuclear submarines, and high-speed trains
The embedded and co-cured damping composite structure (ECCDS) is a type of pre-processing damping structure, which consists of composite layer and damping material layers embedded into the composite
The location and distribution of damping material layers can be determined according to the design of the structure
Summary
The impact of vibrations, shocks, and noise environments cannot be overlooked with respect to the development of new satellites, aircraft, underwater nuclear submarines, and high-speed trains. These adverse factors will lead to lower operational control accuracy, structural fatigue damage, shortened safety life, and other consequences.[1,2,3,4,5,6] Increasing the structural damping is considered to be the most effective method for reducing vibrations and noise.[7,8] the development of a new high-damping structure has an important strategic significance.
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