An Investigation of Residual Stress Characterization of 7075-T6 Aluminum for Application in Fatigue Analysis
Abstract
Residual stresses induced by a stress concentration have been shown to increase the fatigue life of materials. An experimental investigation was undertaken to establish a relationship which would allow for the prediction of local residual stresses at a notch from known geometrical stress concentration factors and applied loads. Notched flat plate specimens were tested utilizing photoelastic coatings for measurement of stress concentration factors and residual stresses. Handbook values for stress concentration factors were found to be accurate within seven percent for the geometrics tested. The residual stress characterization consisted of a plot of nominal stress versus residual stress. These plots predicted residual stresses to within ten percent of the measured values for typical flight load histories.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1978
- Accession Number
- ADA067580
Entities
People
- Gary L. Stuart
Organizations
- Naval Postgraduate School