1995 Volume 61 Issue 581 Pages 146-152
Nickel foil strain gages are attached on the surface of a specimen subjected to repeated loads, and the elastic stresses are measured by observing slip bands in the foil gages resulting from repeated strains. Calibration studies with rotating-bending tests at various temperatures in the range of room temperature to 350°C are performed on round steel bars with nickel foil. The relationship between the threshold stress for the first appearance of slip bands and the number of stress cycles is examined at varying temperatures in a range of about 100°C, which provides the calibration values of the nickel foil tested at varying temperatures. Furthermore, assuming that the first appearance of slip bands is based on the linear cumulative damage law, the calibration values at varying temperatures are calculated from those established by the calibration tests at several constant temperatures. The calculated calibration values are compared with the results obtained by the calibration tests at varying temperatures.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Transactions of the Japan Society of Mechanical Engineers Series C
Transactions of the Japan Society of Mechanical Engineers Series B
