Method for estimating a life of apparatus under narrow-band random stress variation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 11, 2003
Grant Date -
Oct 25, 2001
app pub date -
Dec 4, 2000
filing date -
Apr 7, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for estimating the life of an apparatus under a random stress amplitude variation, involving determining a probability density function of a cumulated damage quantity and estimating the life of the apparatus on the basis of the probability density function, characterized by: approximating a damage coefficient indicative of a damage quantity per unit by a linear expression when the random stress amplitude variation is in a narrow band; and representing the random stress amplitude variation .sigma.(t)(instantaneous) in terms of the sum of a time averaged value .sigma.(t)(mean) and a stochastic variation .sigma.'.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully