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Stress-heat flux characterization of linear dynamic coupled thermoelasticity for an inhomogeneous isotropic infinite cylinder under plane strain conditions and zero heat-flux normal to the plane is presented. It is shown that for a bounded cross-section of the cylinder, a 3D stress-heat flux process is generated by a 2D one, and a uniqueness theorem for the associated 2D initial-boundary value problem is established. In addition, an asymptotic approach to the 2D stress-heat flux initial-boundary value problem, in the form of a power series with respect to a small thermoelastic coupling field, is proposed. Also, Green' s formulas for time-periodic complex-valued solutions to 2D stress-heat flux field equations are obtained; and the existence of a globally constrained real-valued periodic and attenuated on the time-axis stress-heat flux mode satisfying homogeneous natural boundary conditions is proved. The stress-heat flux characterization covers a large class of FGM's with physical properties smoothly distributed over the cross-section of the infinite cylinder. The results obtained are complementary to those of linear dynamic coupled thermoelasticity published up to date and should prove useful for a number of researchers in the field. [ABSTRACT FROM AUTHOR]

In previous work a one-dimensional averaged theory of thermoelastic waves in a microperiodic layered infinite solid was proposed in which an eighth-order-in-time partial differential equation involving a high intrinsic mechanical frequency ΩM and a high intrinsic thermal frequency ΩT is a central equation. Also, the existence of two harmonic thermoelastic waves of a given frequency ω propagating in a positive direction normal to the layering was previously established when &OHgr;M&ThickSpace;→&ThickSpace;∞ and &OHgr;T&ThickSpace;<&ThickSpace;∞, or &OHgr;M&ThickSpace;<&ThickSpace;∞ and &OHgr;T&ThickSpace;→&ThickSpace;∞. The existence of two harmonic thermoelastic waves of a given frequency &ohgr; propagating in the positive direction normal to the layering is proved when &OHgr;M&ThickSpace;<&ThickSpace;∞ and &OHgr;T&ThickSpace;<&ThickSpace;∞. Also, a closed form of the associated velocities and attenuation coefficients is obtained. Numerical results illustrating propagation of the two waves in a particular microperiodic layered thermoelastic solid are included. [ABSTRACT FROM AUTHOR]