A PHOTOELASTIC INVESTIGATION OF STRESSES IN THE HUB OF A PROPOSED 20,000-SHP CONTROLLABLE-PITCH PROPELLER,

Abstract

A three-dimensional photoelastic model of the hub of a proposed 20,000-shaft horsepower controllable-pitch marine propeller was built and tested. Stresses were determined by strain gages and photoelastic measurements at selected locations for the 'crash-stop' load condition. The hub stresses for the case of one blade hitting a submerged object were investigated to a limited extent by strain gages. Stress concentrations at the inside corners were extremely high, causing stresses of the order of 65,000 psi to 84,000 psi in the prototype. It is recommended that larger fillet radii be used at all inside corners to reduce the stresses. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1960
Accession Number
AD0650643

Entities

People

  • John E. Buhl Jr.
  • Joseph S. Brock

Tags

DTIC Thesaurus Topics

  • Controllable Pitch Propellers
  • Engineering
  • Gages
  • Horsepower
  • Marine Propellers
  • Measurement
  • Mechanical Engineering
  • Models
  • Propellers
  • Propulsion Systems
  • Strain Gages
  • Stress Concentration
  • Stresses
  • Three Dimensional

Fields of Study

  • Engineering

Readers

  • Aerodynamics.
  • Marine Hydrodynamics
  • Mechanical Engineering/Mechanics of Materials.