On stress-relaxation in bending: For example results applied to Zircaloy-4

The meaning of the different parameters obtained from stress-relaxation measurements in bending is discussed. It is shown that the measured stresses are an average value of the stress distribution in the material. A procedure is given to calculate the stress in the surface of the beam independently from the creep law and the possibility of obtaining the creep constants from the stress-relaxation data is discussed. Finally, the results are...