The effect of damping layers on vibration of laminated thick plates

Book · Wed Nov 01 04:00:00 EST 1995

OSTI ID:124718

Ohta, Yoshiki; Narita, Yoshihiro ^[1]

---

1. Hokkaido Inst. of Tech., Sapporo (Japan). Dept. of Mechanical Engineering

This paper deals with the effect of damping layers on vibration characteristics of cross-ply laminated, fiber reinforced plastics (FRP) thick plates with damping interleaves. For this purpose, the laminated plates are modeled by using the Multi-Layer (Individual-Layer) Theory. In this theory, a coordinate system is individually taken in each FRP layer or damping layer, and in-plane and out-of-plane displacements are assumed in the polynomial forms of third and second order, respectively. A set of governing equations for the whole laminated plate is derived from the equations of motion and other interfacial conditions. The free vibration and steady state vibration problems of the laminated plate are thus solved by the multi-layer theory. For comparison, an analysis is also presented by using the Lamination Theory, which uses only a single displacement field for the whole plate. Natural frequencies and steady state responses are calculated in numerical examples for the plates with various stacking sequence and thickness ratios of damping layers to FRP layers, and the effects of location and thickness of the damping layers on vibration characteristics are studied. Furthermore, the applicability of both the multi-layer and the lamination theories in the vibration analysis is discussed by comparing two sets of results.

• OSTI ID: 124718
• Report Number(s): CONF-950740--; ISBN 0-7918-1332-0
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BUILDING MATERIALS
COMPOSITE MATERIALS
DAMPING
EXPERIMENTAL DATA
FREQUENCY DEPENDENCE
INTERFACES
MATHEMATICAL MODELS
MECHANICAL STRUCTURES
MECHANICAL VIBRATIONS
PLATES
REINFORCED PLASTICS
RESPONSE FUNCTIONS