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A probabilistic fracture mechanics approach for structural reliability assessment of space flight systemsA probabilistic fracture mechanics approach for predicting the failure life distribution due to subcritical crack growth is presented. A state-of-the-art crack propagation method is used in a Monte Carlo simulation to generate a distribution of failure lives. The crack growth failure model expresses failure life as a function of stochastic parameters including environment, loads, material properties, geometry, and model specification errors. A stochastic crack growth rate model that considers the uncertainties due to scatter in the data and mode misspecification is proposed. The rationale for choosing a particular type of probability distribution for each stochastic input parameter and for specifying the distribution parameters is presented. The approach is demonstrated through a probabilistic crack growth failure analysis of a welded tube in the Space Shuttle Main Engine. A discussion of the results from this application of the methodology is given.
Document ID
19920062615
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sutharshana, S.
(JPL Pasadena, CA, United States)
Creager, M.
(Structural Integrity Engineering Chatsworth, CA, United States)
Ebbeler, D.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Moore, N.
(JPL Pasadena, CA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
Quality Assurance And Reliability
Meeting Information
Meeting: Advances in Fatigue Lifetime Predictive Techniques
Location: San Francisco, CA
Country: United States
Start Date: April 24, 1990
Accession Number
92A45239
Distribution Limits
Public
Copyright
Other

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