Three-Dimensional Photoelastic Stress Analysis of the Dovetail Region of the TF-30 Turbine Engine's Third-Stage Fan.

Abstract

Three-dimensional photoelastic analysis of the disk/blade dovetail region of the TF-30 turbine engine's third-stage fan indicates peak stresses in the disk and blade fillets that are an order of magnitude greater than the average stress in the neck of the disk lug. Maximum stress concentrations found in the fillets of the disk lugs for representative loads are: 9.6 for centrifugal load; 12.6 for centrifugal load with 12% circumferential component; and 10.6 for centrifugal load with an 18% antiplane component. The addition of circumferential or antiplane bending components to the centrifugal load increased the peak stress and shifted it toward the region of the fillet where fractures have been observed. The analysis gives quantitative indication of the significance of bending in the failure of disk lugs. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 29, 1978
Accession Number
ADA063300

Entities

People

  • R. J. Sanford
  • V. J. Parks

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Bending Stress
  • Centrifugal Force
  • Engines
  • Failure Analysis
  • Geometry
  • Manufacturing
  • Materials
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • Stress Analysis
  • Stress Concentration
  • Stresses
  • Three Dimensional
  • Turbines
  • Turbojet Engines
  • Two Dimensional

Readers

  • Aerodynamics.
  • Structural Health Monitoring of Composite Structures.