Numerical Procedures for Analysis of Structural Shells.

Abstract

An evaluation is undertaken of currently used discretization procedures in numerical analysis of structures. Emphasis is on the nonlinear behavior of thin shells and plates. It is found that the computer economy is extremely sensitive to the choice of element configuration. A proper balance between the order of the approximations of inplane and lateral displacements is important. The best finite element procedures are superior to finite differences for bifurcation buckling and for moderate nonlinearity. However, for shell collapse analysis the finite differences approach is quite superior to the finite elements. Suggestions are made for improvement of finite element technology for structures undergoing large rotations.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1981
Accession Number
ADA111568

Entities

People

  • B. O. Almroth
  • F. A. Brogan

Organizations

  • Lockheed Martin Missiles and Space

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Engineering
  • Equations
  • Finite Element Analysis
  • Galerkin Method
  • Geometry
  • Grids
  • Materials
  • Mechanics
  • Modulus Of Elasticity
  • Nonlinear Analysis
  • Numerical Analysis
  • Partial Differential Equations
  • Structural Mechanics

Fields of Study

  • Physics

Readers

  • Structural Dynamics.
  • Systems Analysis and Design