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Fatigue life prediction of an intermetallic matrix composite at elevated temperaturesA strain-based fatigue life prediction method is proposed for an intermetallic matrix composite (IMC) under tensile cyclic loadings at elevated temperatures. Styled after the 'Universal Slopes' method, the model utilizes the composite's tensile properties to estimate fatigue life. Factors such as fiber volume ratio (Vf), number of plys and temperature dependence are implicitly incorporated into the model through these properties. The model constants are determined by using unidirectional fatigue data at temperatures of 425 and 815 C. Fatigue lives from two independent sources are used to verify the model at temperatures of 650 and 760 C. Cross-ply lives at 760 C are also predicted. It is demonstrated that the correlation between experimental and predicted lives is within a factor of two.
Document ID
19930047361
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bartolotta, P. A.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1991
Publication Information
Publication: In: Failure mechanisms in high temperature composite materials; Proceedings of the Symposium, 112th ASME Winter Annual Meeting, Atlanta, GA, Dec. 1-6, 1991 (A93-31351 11-24)
Publisher: American Society of Mechanical Engineers
Subject Category
Composite Materials
Accession Number
93A31358
Funding Number(s)
PROJECT: RTOP 510-01-50
Distribution Limits
Public
Copyright
Other

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