STRESS STATE IN THE COMBINED STRESS TORSION TEST

Abstract

An analysis of the stresses in the axial stress-torsion test is presented by considering the gage section as a cylinder undergoing uniform axial deformation with superimposed torsion. Calculation of the stresses requires measurement of the radial deformation and penetration of the plastic region into the notch shoulders. The hydrostatic stress exhibits a peak within the wall of the gage section which increases with decreasing gage length. The fracture strain in room temperature tests increases with decreasing gage length when a compressive axial load is applied and decreases slightly with decreasing gage length when a tensile axial load is applied. Severe distortion and large changes in length of the gage section during hot torsion testing prevent application of the analysis to high temperature tests.

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Document Details

Document Type
Technical Report
Publication Date
May 24, 1968
Accession Number
AD0671946

Entities

People

  • H. A. Kuhn

Organizations

  • Drexel University

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Air Force Facilities
  • Axial Loads
  • Engineering
  • Equations
  • High Temperature
  • Hot Working
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Materials Science
  • Mechanical Working
  • Mechanics
  • Metallurgy
  • Navy
  • Plastic Flow

Fields of Study

  • Engineering

Readers

  • Mechanical Engineering/Mechanics of Materials.