On the Extent of Dominance of Asymptotic Elastodynamic Crack-Tip Fields. Part 2. Numerical Investigation of Three-Dimensional and Transient Effects

Abstract

It is increasingly being recognized that the stress and displacement fields near the tip of a crack are essentially three dimensional in nature. Exact analytical solutions for the three-dimensional crack problem, however, do not exist in general. Thus, finite-elements have been used extensively to gain an understanding of the three dimensional structure of the crack tip fields. The finite-element method has also been used to study three dimensional dynamic fracture problems. For the most part, however, special singular elements have been used to model the crack tip. The purpose of employing singular elements has been bias the near tip field to have a particular (asymptotically known) structure in order to extract the magnitude of crack tip singularities (the stress intensity factor, J-integral, et cetera).

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1988
Accession Number
ADA243567

Entities

People

  • Aares J. Rosakis
  • G. Ravichandran
  • Sridhar Krishnaswamy

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Applied Mechanics
  • Computational Science
  • Crack Tips
  • Elastic Properties
  • Engineering
  • Experimental Data
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Geometry
  • J Integrals
  • Materials
  • Mechanics
  • Simulations
  • Stress Analysis
  • Stress Intensity Factors
  • Three Dimensional
  • Two Dimensional

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Materials Science (Mechanical Engineering).
  • Systems Analysis and Design