Determination of Failure Characteristics of Materials and Structures.

Abstract

The formulation for general three-dimensional small strain plasticity is presented. A finite element computer code has been developed to carry out the analysis. General hardening characteristics are included as an input option to the program allowing for the study of a wide class of materials. An example through crack problem is solved employing three different hardening assumptions (isotropic, kinematic and mixed). The plastic deformation in the region of the crack front predicted with each of the models is compared. While the predicted results are similar, several fundamental characteristics of each assumption can be observed. Residual deformation zones are also calculated as a measure of the extent of plastic deformation. The qualitative differences between hardening assumptions are consistent between the plasticity measures allowing for direct comparison with experimental observation.

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Document Details

Document Type
Technical Report
Publication Date
Dec 14, 1984
Accession Number
ADA152073

Entities

People

  • H. Liebowitz

Organizations

  • George Washington University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Elastic Properties
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Geometric Forms
  • Geometry
  • Grids
  • Measurement
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • Plastic Properties
  • Stress Strain Relations
  • Stresses
  • Three Dimensional
  • Two Dimensional

Readers

  • Computational Fluid Dynamics (CFD)
  • Mechanical Engineering/Mechanics of Materials.
  • Theoretical Analysis.