Fundamental Frequency of a Composite Sandwich Plate Containing Woven Layers

Abstract

In this report the fundamental frequency of a sandwich composite plate containing woven fabric layers is determined using the Rayleigh-Ritz technique. The plate contains a Baltek balsa wood core and face sheets made of both unidirectional and woven fiberite layers. The flexural stiffnesses for the face sheets are obtained using the mosaic model. Of specific interest is the fundamental transverse bending mode and is numerically computed using MATHEMATICA for simply supported boundary conditions and clamped boundary conditions which are the in service boundary conditions. Experimental frequencies are determined for simulated free boundary conditions and are used as a means of comparison for the numerically computed fundamental frequencies.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1997
Accession Number
ADA359126

Entities

People

  • Colin P. Ratcliffe
  • Oscar Barton Jr.

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerospace Industry
  • Boundaries
  • Composite Materials
  • Differential Equations
  • Engineering
  • Equations
  • Frequency
  • Geometry
  • Honeycomb Structures
  • Mechanical Engineering
  • Mechanics
  • Modal Analysis
  • Partial Differential Equations
  • Resonant Frequency
  • Sandwich Composites
  • United States Naval Academy
  • Vibration

Fields of Study

  • Materials science

Readers

  • Linear Algebra
  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.