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

PDF Url : ADA326074

Report Date : 05 SEP 1972

Pagination or Media Count : 144

Abstract : An experimental program was conducted to evaluate the -S/N- 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