Accession Number:

ADA326074

Title:

Evaluation of the -S/N- Fatigue Life Gage under Constant and Variable Amplitude Loading,

Descriptive Note:

Final rept.,

Corporate Author:

NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA

Personal Author(s):

Report Date:

1972-09-05

Pagination or Media Count:

144.0

Abstract:

An experimental program was conducted to evaluate the -SN- Fatigue Life Gage and a number of gage installations was evaluated for constant and variable amplitude loading. The test results demonstrated that while there was a qualitative relation between gage resistance change and specimen life expended, a usable quantitative correlation was not attainable. Test results also proved that the fraction of specimen life to initial detectable crack was a better indicator of the time for retirement of a structure than was the fatigue life gage, although no estimate of the damage incurred can be obtained prior to crack detection.

Descriptors:

• *FATIGUE LIFE
• *STRAIN GAGES
• DETECTION
• CRACKS
• CORRELATION
• RETIREMENT
• MONITORS
• LIFE TESTS
• INDICATORS

Subject Categories:

• Mechanics
• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE