Dynamic Characteristics of Elastic Bonding in Composite Laminates: A Free Vibration Study

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作者：
机构：
[1] Liew, K.M.
[2] Zhang, J.Z.
[3] Ng, T.Y.
[4] Reddy, J.N.
来源：
Liew, K.M. (mkmliew@ntu.edu.sg) | 1600年 / American Society of Mechanical Engineers卷 / 70期
关键词：
Bond strength (materials) - Bonding - Boundary conditions - Computational methods - Inclusions - Kinematics - Laminated composites - Mathematical models - Stress analysis - Vibrations (mechanical);
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摘要：
In conventional analyses of composite laminates, the assumption of perfect bonding of adjoining layers is well accepted, although this is an oversimplification of the reality. It is possible that the bond strength may be less than that of the laminae. Thus, the study of weak bonding is an interesting focus area. In this study, an elastic bonding model based on three-dimensional theory of elasticity in a layerwise framework is used to study composite laminates. The differential quadrature (DQ) discretization is used to analyze the layerwise model. The present model enables the simulation of actual bonding stress states in laminated structures. The interfacial characteristics of transverse stress continuity as well as the kinematic continuity conditions are satisfied through the inclusion of the elastic bonding layer. The present model is employed to investigate the free vibration of thick rectangular cross-ply laminates of different boundary conditions and lamination schemes.
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