Finite Element Method for the Finite-Displacement Analysis of Sandwich Composite Panels.

Abstract

A finite element method is presented for the large deflection analysis of flat, layered sandwich panels having arbitrarily-shaped boundaries. Fully compatible isoparametric elements based upon Hermite bicubic interpolation are formulated, and requirements for the satisfaction of both displacement and slope compatibility are discussed. As special cases, the analysis can be applied to thin laminated plates and multicore sandwich, as well as elastically-supported plates. Solutions for geometrically nonlinear behavior are obtained by either the conjugate gradient or variable metric method. Applications presented include rectangular, skewed, annular and circular geometries. The analysis is shown to maintain displacement and stress accuracy for elements having extremely large aspect ratios, or edges which degenerate to a single point. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1978
Accession Number
ADA058491

Entities

People

  • Fred K. Bogner
  • Robert A. Brockman

Organizations

  • University of Dayton Research Institute

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Composite Materials
  • Computer Programs
  • Computers
  • Construction
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Geometry
  • Materials
  • Mechanics
  • Nonlinear Analysis
  • Numerical Analysis
  • Potential Energy
  • Sandwich Composites
  • Sandwich Construction
  • Sandwich Panels
  • Shape

Fields of Study

  • Engineering

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Structural Dynamics.