Elastothermodynamic Damping in Particulate Composites: Hollow Spherical Inclusions

[+] Author and Article Information
V. K. Kinra, J. E. Bishop

Center for Mechanics of Composites, Department of Aerospace Engineering, Texas A&M University, College Station, TX 77843-3141

J. Appl. Mech 64(1), 111-115 (Mar 01, 1997) (5 pages) doi:10.1115/1.2787260 History: Received August 31, 1995; Revised June 10, 1996; Online October 25, 2007


When a composite material is subjected to a time-harmonic stress field (homogeneous or inhomogeneous), different phases undergo different temperature fluctuations due to the well-known thermoelastic effect. As a result irreversible heat conduction occurs within each phase and between phases, and entropy is produced. This entropy production is the genesis of elastothermodynamic damping and, as a consequence of the second law of thermodynamics, manifests itself as a conversion of work into heat. This paper is concerned with the calculation of elastothermodynamic damping in a matrix reinforced with hollow spheres. Numerical results are presented for an alumina/aluminum composite sphere subjected to a uniform radial stress at the outer boundary. When the cavity occupies more than 75 percent volume fraction of the alumina inclusion, the total damping becomes vanishingly small.

Copyright © 1997 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In