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