Vibration of Thick Rectangular Plates of Bimodulus Composite Material.

Abstract

A finite-element analysis is carried out for small-amplitude free vibration of laminated, anisotropic, rectangular plates having arbitrary boundary conditions, finite thickness-shear moduli, rotatory inertia, and bimodulus action (different elastic properties depending upon whether the fiber-direction strain is tensile or compressive). The element has five degrees of freedom, three displacements and two slope functions, per node. An exact closed-form solution is also presented for the special case of freely supported single-layer orthotropic and two-layer, cross-ply plates. This provides benchmarks to evaluate the validity of the finite-element analysis. Both solutions are compared with numerical results existing in the literature for special cases (all for ordinary, not bimodulus, materials) and good agreement is obtained. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1980
Accession Number
ADA087424

Entities

People

  • C. W. Bert
  • Junuthula N. Reddy
  • V. S. Reddy
  • W. C. Chao

Organizations

  • University of Oklahoma

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Boundaries
  • Composite Materials
  • Displacement
  • Elastic Properties
  • Engineering
  • Equations
  • Finite Element Analysis
  • Frequency
  • Laminates
  • Materials
  • Mechanics
  • Modulus Of Elasticity
  • Resonant Frequency
  • Shear Modulus
  • Thickness
  • Transverse
  • Vibration

Fields of Study

  • Engineering

Readers

  • Structural Dynamics.