Frequency dependence of fatigue life and internal heating of a fiber-reinforced/ceramic-matrix composite

Journal Article · Thu Dec 01 04:00:00 EST 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb04587.x· OSTI ID:6604946

Holmes, J W; Wu, X; Sorensen, B F ^[1]

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1. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Mechanical Engineering and Applied Mechanics

The influence of loading frequency on the fatigue life and internal (frictional) heating of unidirectional SiC-fiber/calcium aluminosilicate-matrix composites was investigated at room temperature. Specimens were subjected to tension-tension fatigue at sinusoidal loading frequencies from 25 to 350 Hz and maximum fatigue stresses of 180 to 240 MPa. The key findings of the study were that (1) fatigue life decreased sharply as the loading frequency was increased, (2) for all loading frequencies, fatigue failures occurred at stress levels that were significantly below the monotonic proportional limit stress if [approximately]285 MPa, and (3) pronounced internal heating occurred during fatigue, with the surface temperature of the fatigue specimens increasing by 160 K during 350-Hz fatigue at a peak stress of 240 MPa.

• OSTI ID: 6604946
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 77:12; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
COMPOSITE MATERIALS
DATA
EXPERIMENTAL DATA
FATIGUE
FRICTION
INFORMATION
INTERNAL FRICTION
MATERIALS
MECHANICAL PROPERTIES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SAMPLE PREPARATION
SILICON CARBIDES
SILICON COMPOUNDS
SILICON OXIDES
TENSILE PROPERTIES