NDLI: Probabilistic model for fracture mechanics service life analysis

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Probabilistic model for fracture mechanics service life analysis

Content Provider	NASA Technical Reports Server (NTRS)
Author	Annis Sr., Charles Watkins, Tommie
Copyright Year	1988
Description	The service longevity of complex propulsion systems, such as the Space Shuttle Main Engine (SSME), can be at risk from several competing failure modes. Conventional life assessment practice focuses upon the most severely life-limited feature of a given component, even though there may be other, less severe, potential failure locations. Primary, secondary, tertiary failure modes, as well as their associated probabilities, must also be considered. Futhermore, these probabilities are functions of accumulated service time. Thus a component may not always succumb to the most severe, or even the most probable failure mode. Propulsion system longevity must be assessed by considering simultaneously the actions of, and interactions among, life-limiting influences. These include, but are not limited to, high frequency fatigue (HFF), low cycle fatigue (LCF), and subsequent crack propagation, thermal and acoustic loadings, and the influence of less-than-ideal nondestructive evaluation (NDE). An outline is provided for a probabilistic model for service life analysis, and the progress towards its implementation is reported.
File Size	353638
Page Count	7
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19900019334
Archival Resource Key	ark:/13960/t46q6vd7c
Language	English
Publisher Date	1988-09-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Service Life Nondestructive Tests Fracture Mechanics Probability Theory Failure Modes Risk Engine Parts Crack Propagation Failure Analysis Fatigue Materials Mathematical Models Prediction Analysis Techniques Structural Analysis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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