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Creep-rupture reliability analysisA probabilistic approach to the correlation and extrapolation of creep-rupture data is presented. Time temperature parameters (TTP) are used to correlate the data, and an analytical expression for the master curve is developed. The expression provides a simple model for the statistical distribution of strength and fits neatly into a probabilistic design format. The analysis focuses on the Larson-Miller and on the Manson-Haferd parameters, but it can be applied to any of the TTP's. A method is developed for evaluating material dependent constants for TTP's. It is shown that optimized constants can provide a significant improvement in the correlation of the data, thereby reducing modelling error. Attempts were made to quantify the performance of the proposed method in predicting long term behavior. Uncertainty in predicting long term behavior from short term tests was derived for several sets of data. Examples are presented which illustrate the theory and demonstrate the application of state of the art reliability methods to the design of components under creep.
Document ID
19850060415
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Peralta-Duran, A.
(Garrett Turbine Engine Co. Phoenix, AZ, United States)
Wirsching, P. H.
(Arizona, University Phoenix, United States)
Date Acquired
August 12, 2013
Publication Date
July 1, 1985
Publication Information
Publication: ASME, Transactions, Journal of Vibration, Acoustics, Stress, and Reliability in Design
Volume: 107
ISSN: 0739-3717
Subject Category
Structural Mechanics
Accession Number
85A42566
Funding Number(s)
CONTRACT_GRANT: NAG3-41
Distribution Limits
Public
Copyright
Other

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