Fatigue life prediction of an intermetallic matric composite at elevated temperatures

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5279244

Bartolotta, P A

A 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, 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.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
• OSTI ID: 5279244
• Report Number(s): N-91-25442; NASA-TM--104494; E--6352; NAS--1.15:104494; CONF-911213--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALLOYS
FATIGUE
FORECASTING
INTERMETALLIC COMPOUNDS
MATERIALS
MATHEMATICAL MODELS
MATRIX MATERIALS
MECHANICAL PROPERTIES
SILICON ALLOYS
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
THERMAL FATIGUE
TITANIUM ALLOYS