Abstract
Dynamic creep tests were carried out with 0.05 percent carbon steel at 450°C under combined stresses of static tension and alternating bending. The present study aims to establish the basis for analysis of the dynamic creep strength under combined stresses of static tension and alternating bending from static creep data or from the data of dynamic creep under pulsating axial stresses. The residual stress retained after the dynamic creep test was measured and compared with the results of analysis, in order to examine the validity of the basic idea on which the analysis is based.
According to the results of the study, it is ascertained that the approximate estimation of the dynamic creep strength under combined stresses of static tension and alternating bending can be made by applying the same method of analysis as that for the prediction of dynamic creep under axial varying stress from static creep data, which has been reported previously. The distribution of the residual stress retained after the tests is also discussed.
