A PRESSURE TECHNIQUE FOR DETERMINING RESIDUAL STRESSES IN CIRCULAR TUBES

Abstract

An experimental method is described for direct measurement of pressure-induced residual stresses in tubes. Successive layers are removed from the tube bore. After each layer is removed, the tube is pressurized until the original exterior state of strain (monitored by strain gages) is restored. The required pressure is a direct measure of the original radial residual stress which existed at that point to which the tube material has been removed. Theory is developed for the residual stresses produced by inducing complete plasticity in a tube by means of internal pressure. Theoretical predictions of radial stress agreed well with measurements taken by the technique described. It is concluded that the technique is applicable to measurement of pressure-induced residual stresses in tubes and requires no previous knowledge of elastic constants. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1961
Accession Number
AD0266851

Entities

People

  • J.p. Purtell
  • R.e. Weigle

Tags

DTIC Thesaurus Topics

  • Gages
  • Internal Pressure
  • Materials
  • Measurement
  • Mechanical Properties
  • Physical Properties
  • Radial Stress
  • Residual Stress
  • Residuals
  • Strain Gages
  • Stresses

Readers

  • Mechanical Engineering/Mechanics of Materials.