Layerwise Dynamic Analysis of Composite Laminates with Co-cured Viscoelastic Damping Layers

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (1) : 6-12.

XU Chao1, LIN Song1, WANG Lifeng2 , WANG Jianyue2

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Abstract

The Co-curing of thin viscoelastic damping materials in the composite laminates can improve their structural damping with less loss of stiffness and strength. However, classic numerical simulation of the damped structures by hybrid finite element method demands a cumbersome computational work, especially for complicated layered structures. A new 4-node quadrangular plate finite element based on the discrete layerwise plate theory is developed in this paper for dynamics analysis of composite laminates with co-cured viscoelastic layers. The natural frequency and modal loss factors of different viscoelastic damped laminated beam, cylindrical shell and stiffened plate are computed. Results show that the proposed model can correctly describe the high shear pattern developed inside the thin viscoelastic layers and providing results with less computational work.

Key words

Viscoelastic / Damped composite / Discrete layewise theory / Finite element analysis

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XU Chao;LIN Song;WANG Lifeng;WANG Jianyue. Layerwise Dynamic Analysis of Composite Laminates with Co-cured Viscoelastic Damping Layers[J]. Journal of Vibration and Shock, 2015, 34(1): 6-12