Accession Number:

AD0603206

Title:

CYCLIC PLASTICITY EFFECTS IN INTERMEDIATE AND LOW CYCLE FATIGUE.

Descriptive Note:

Rept. for Jun 58-Dec 63,

Corporate Author:

MINNESOTA UNIV MINNEAPOLIS

Personal Author(s):

Report Date:

1964-05-01

Pagination or Media Count:

80.0

Abstract:

The cyclic stress-strain behavior of two different materials was observed in the low and intermediate cycle fatigue range. SAE 4130 steel, which softens under fatigue stressing, was subjected to reversed-flexure fatigue, and the moment-strain behavior observed. Rotating bending tests were used to determine the cyclic stress-strain relationships as a function of the number of imposed cycles. Using these relationships, calculated moment-strain patterns for reversed-flexure were obtained for comparison with the observed experimental results. Pure copper in an annealed condition was the second material investigated. This material hardens under fatigue stressing. Reversed flexure tests were performed on this material, also, but in this case axial stress tests were used to determine the cyclic stress-strain properties. Again, predicted moment-strain trends, based on calculations using the axial-stress data, are compared with the experimental reversed-flexure results. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE