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Probability of stress-corrosion fracture under random loading.A method is developed for predicting the probability of stress-corrosion fracture of structures under random loadings. The formulation is based on the cumulative damage hypothesis and the experimentally determined stress-corrosion characteristics. Under both stationary and nonstationary random loadings, the mean value and the variance of the cumulative damage are obtained. The probability of stress-corrosion fracture is then evaluated using the principle of maximum entropy. It is shown that, under stationary random loadings, the standard deviation of the cumulative damage increases in proportion to the square root of time, while the coefficient of variation (dispersion) decreases in inversed proportion to the square root of time. Numerical examples are worked out to illustrate the general results.
Document ID
19730033681
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Yang, J.-N.
(California Institute of Technology, Jet Propulsion Laboratory, Structures, Structural Dynamics and Materials Section, Pasadena Calif., United States)
Date Acquired
August 7, 2013
Publication Date
December 1, 1972
Subject Category
Structural Mechanics
Accession Number
73A18483
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

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