Method of Determining Fatigue Life and Remaining Life
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United States of America Patent
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Issued Date -
Dec 30, 2010
app pub date -
Dec 14, 2007
filing date -
Dec 14, 2007
priority date (Note) -
Abandoned
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Abstract
The present invention concerns a method of calculating the expected life of a hardened metal object in relation to a number of fatigue load cycles exerted on the hardened metal object. The method comprises determining the development of microstructural deterioration as a function of fatigue exposure time, deriving therefrom an equation for the development of a Fatigue Damage Index as a function of fatigue exposure time and relating this equation to a known critical value of the Fatigue Damage Index that leads to material failure. The present invention also provides a method of calculating the remaining life of a hardened metal object subjected to fatigue loading.
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