Shear-Flexible Finite-Element Models of Laminated Composite Plates and Shells.

Abstract

Several finite-element models are applied to the linear static, stability, and vibration analysis of laminated composite plates and shells. The study is based on linear shallow-shell theory, with the effects of shear deformation, anisotropic material behavior, and bending-extensional coupling included. Both stiffness (displacement) and mixed finite-element models are considered. Discussion is focused on the effects of shear deformation and anisotropic material behavior on the accuracy and convergence of different finite-element models. Numerical studies are presented which show the effects of (a) increasing the order of the approximating polynomials, (b) adding internal degrees of freedom, and (c) using derivatives of generalized displacements as nodal parameters.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1975
Accession Number
ADA304616

Entities

People

  • Ahmed K. Noor
  • Michael D. Mathers

Organizations

  • Langley Research Center

Tags

DTIC Thesaurus Topics

  • Bending Moments
  • Composite Materials
  • Coordinate Systems
  • Eigenvalues
  • Energy
  • Equations
  • Frequency
  • Graphitic Materials
  • Grids
  • Materials
  • Modulus Of Elasticity
  • Orientation (Direction)
  • Resonant Frequency
  • Stress Analysis
  • Stresses
  • Variational Principles
  • Vibration

Readers

  • Structural Dynamics.