Dynamics of Laminated Plates with Layer Waviness

by Raouf A. Raouf, United States Naval Acad, Annapolis, United States,

Document Type: Proceeding Paper

Part of: Engineering, Construction, and Operations in Space IV


Composite structures usually exhibit a high strength-to-weight ratio as compared to traditional structural materials. This makes them attractive solutions in many aerospace applications. Accordingly, it becomes important that the behavior of these structures be modeled as realistically as possible to predict their response under actual operation conditions. The present paper studies the effects of manufacturing imperfections on the dynamics of laminated plates. The imperfections are modeled as a layer waviness at the edge of the plate, i.e., a local undulations in the interface between layers. Numerical simulations show that layer waviness may increase or decrease the natural frequency of a laminated plate. However, for the studied case, the dominant effect is to decrease the natural frequency.

Subject Headings: Laminated materials | Plates | Composite structures | Structural dynamics | Strength of materials | Structural behavior | Structural models | Manufacturing

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