Accession Number:

AD0266851

Title:

A PRESSURE TECHNIQUE FOR DETERMINING RESIDUAL STRESSES IN CIRCULAR TUBES

Descriptive Note:

Corporate Author:

WATERVLIET ARSENAL N Y

Personal Author(s):

Report Date:

1961-09-01

Pagination or Media Count:

1.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE