Stress Intensity Factors and Crack Paths for Cracks in Photoelastic Motor Grain Models

Abstract

Computational analysis and two dimensional tensile tests on single motor grain fins suggest that cracks in fin tips are most likely to originate at the coalescence of the fin end tip radius with a small radius emanating from the side of the fin. Prior studies have indicated that under internal pressure, cracks on the fin axis are subject to similar stress peaks and may grow more readily than the former types due to the absence of shear modes. The present study focuses upon two types of cracks emanating from the former location called "off-axis" cracks and attempts to differentiate from the two types by their paths and SIP values, determined by the frozen stress photoelastic - method.

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Document Details

Document Type
Technical Report
Publication Date
May 22, 2002
Accession Number
ADA410794

Entities

People

  • C. W. Smith
  • Chun Ting Liu
  • D. M. Constantinescu

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Applied Mechanics
  • Crack Tips
  • Cracks
  • Critical Temperature
  • Fracture (Mechanics)
  • Internal Pressure
  • Materials
  • Measurement
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • Shear Stresses
  • Stress Intensity Factors
  • Stresses
  • Two Dimensional

Readers

  • Electrical Engineering
  • Mechanical Engineering/Mechanics of Materials.
  • Structural Health Monitoring of Composite Structures.