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 accuarate within seven percent for the geometrics tested. The residual stress charcterization consisted of a plot of nominal stress versus residual stress. These plots predicted residual stress to within ten percent of the measured values for typical flight load histories.
An investigation of residual stress characterization of 7075-I6 aluminium for application in fatigue analysis
Untersuchung der Eigenspannung der Aluminiumlegierung 7075-T6 zur Analyse des Ermuedungsverhaltens
US Government Reports ; Dec ; 1-38
1978
38 Seiten
Report
Englisch
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