Damping Characteristics of Metal Matrix Composites.
Final rept. Mar 81-Jan 82,
BOLT BERANEK AND NEWMAN INC CAMBRIDGE MA
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Nine metal matrix composite materials were tested over the frequency range 4 to 10,000 Hz, at room temperature, to determine their damping properties. Cantilever beam samples were measured using both a logarithmic decrement test and a resonant dwell test to cover the entire frequency range. At a peak stress of 5 ksi, measured loss factors ranged from about .0003 to .004, with the graphitealuminum composites generally showing the best highest performance loss factor. These values are measurably no greater than those obtainable on the unreinforced matrix alloys. Author
- Laminates and Composite Materials