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Accelerated Fatigue Testing
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1972 by SAE International in United States
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The people reports data on block program fatigue testing of a simple cantilever specimen with a stress concentration, the specimen being made of SAE 1530 steel. The various programs investigated were based on a normal distribution with a crest factor of 4 and were aimed at accelerating fatigue testing.
From tests on programs with 4,8, and 16 stress levels, it was concluded that at least 8 stress loads were required to stimulate accurately the normal distribution. Tests in which various stress levels were omitted showed that stress levels S/σ< 1.75 contributed nothing to fatigue damage, and consequently they could be omitted from the program, resulting in a saving of 87% in testing time. Stress level in range 1.75 S/σ<=4 had a damaging effect, and even the one of S/σ=4 in each full program of 4000 cycles caused significant damage. This indicates the great importance of the choice of crest factor.
CitationCarse, A. and Crossland, B., "Accelerated Fatigue Testing," SAE Technical Paper 720266, 1972, https://doi.org/10.4271/720266.
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