A Hybrid Collocation Technique for Solution of the Finite Body Single Ended Crack Problem

Abstract

A hybrid experimental/numerical collocation technique was developed for analysis of two dimensional, finite body, single-ended crack problems. Both boundary stress conditions, known a priori, and interior and stress conditions, determined from photoelastic model, were used to specify the loading imposed on the specimen. It was determined that including the interior stress conditions in the analysis increases the rate of solution convergence. Additionally, the interior stress conditions allowed both the stress intensity factor (KI) and the crack mouth opening displacement to be determined over a wider range of crack lengths than was possible with boundary collocation alone. Using the hybrid collocation technique, a single edge notched tension SE(T), specimen, modified by introduction of a semi-circular cutout in front of the crack, was developed and characterized. Crack arrest, Stress intensity factor, Collocation, Photoelasticity.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1989
Accession Number
ADA210121

Entities

People

  • Mark T. Kirk

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Boundaries
  • Data Sets
  • Engineering
  • Equations
  • Experimental Data
  • Geometry
  • Materials
  • Materials Testing
  • Measurement
  • Mechanics
  • Modulus Of Elasticity
  • Optical Properties
  • Photographs
  • Stress Waves
  • Stresses
  • Thickness

Fields of Study

  • Engineering

Readers

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