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Summary: Copyright 2001 by William F. Pratt. Published by Society for the
Advancement of Material and Process Engineering with permission.
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TESTING AND CHARACTERIZATION OF HIGHLY DAMPED STRUCTURAL
MATERIALS
Dr. William F. Pratt
pfc@xmission.com
Matthew S. Allen
MattsAllen@hotmail.com
Patterned Fiber Composites, Inc.
923 West 500 North
Lindon, UT 84042
(801) 785-6520
ABSTRACT
Wavy composite is a new form of constrained layer damping that uses opposing sinusoidal
waveforms in composite constraining layers to greatly enhance damping. Damping
measurements as high as 26%, with the stiffness of aluminum and titanium are shown.
This research is focused on evaluating a test system capable of determining the stiffness and
damping of structural materials with high inherent damping. Time-temperature superposition can
be applied to create a master curve from 1 Hz to 10,000 Hz that completely describes material
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