ELASTOTHERMODYNAMIC DAMPING IN COMPOSITE MATERIALS Academic Article uri icon

abstract

  • When a composite material is subjected to a stress field (homogeneous or inhomogeneous), different phases undergodifferent 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 is the genesis of elastothermodynamic damping. In this paper we take the second law of thermodynamics as our starting point and calculate the elastothermodynamic damping of an N-layer medium with perfect or imperfect thermal interfaces in a rectangular, cylindrical, and spherical co-ordinate system. Each layer of the composite may be subjected to any stress state so long as the resulting heat conductioncan be described by a single spatial co-ordinate orthogonal to the layering. By way of illustration, results are presentedfor the following boundary value problem: an JV-layer periodic medium with a two-layer unit cell and a perfect or imperfectthermal interface. Two canonical mechanical states are considered: (1) a time-harmonic uniform stress perpendicular to thelayering, and (2) a time-harmonic uniform strain parallel to the layering. © 1994 Taylor and Francis Group, LLC.

published proceedings

  • Mechanics of Advanced Materials and Structures

author list (cited authors)

  • Bishop, J. E., & Kinra, V. K.

complete list of authors

  • Bishop, Joseph E||Kinra, Vikram K

publication date

  • January 1, 1994 11:11 AM