Dynamic Effects in Elastothermodynamic Damping of Metal-Matrix Composites with Spherical Reinforcement

[+] Author and Article Information
S. K. Srivastava, B. K. Mishra, S. C. Jain

Department of Mechanical & Industrial Engineering, University of Roorkee, Roorkee-247 667, India

J. Vib. Acoust 121(4), 476-481 (Oct 01, 1999) (6 pages) doi:10.1115/1.2894005 History: Received July 01, 1999; Online February 26, 2008


When a composite material is subjected to a time varying strain field, energy is dissipated because of the thermoelastic effect (elastothermodynamic damping or ETD). Evaluation of ETD in particle-reinforced MMCs has been reported in literature. These works follow a quasi-static approach. In the present work, a full dynamic solution for the energy dissipation is obtained, using the entropic approach. It is observed that the specific damping capacity predicted by the dynamic solution deviates from the quasi-static solution at high normalized frequencies, for low inclusion radius and low volume fraction.

Copyright © 1999 by The American Society of Mechanical Engineers
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