Finite Element Model for Gap Contact Problems

Abstract

A finite element model is developed for structural analysis of axisymmetric geometries with surface contact. The contact occurs when small gaps exist between adjacent parts of the structure and these gaps are closed during the loading cycle. In the model, this phenomenon is simulated by special gap finite elements. Originally, the gap elements have relatively low stiffness, and as surface contact is obtained, the stiffness matrix of these elements is modified to simulate very stiff response in the direction of the contact. The finite element model allows for elastic-plastic and elastic-viscoplastic materials with isotropic or orthotropic properties. The axisymmetric configuration allows for three displacement components in the cylindrical coordinates.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1991
Accession Number
ADA241237

Entities

People

  • Adam R. Zak

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Axisymmetric
  • Computational Fluid Dynamics
  • Computer Programs
  • Coordinate Systems
  • Elastic Properties
  • Engineering
  • Equations
  • Finite Element Analysis
  • Geometry
  • Materials
  • Mechanics
  • Modulus Of Elasticity
  • Numerical Analysis
  • Plastic Properties
  • Shear Modulus
  • Stiffness
  • Stress Strain Relations

Fields of Study

  • Engineering

Readers

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  • Structural Dynamics.