Based on the Lord and Shulman generalized thermo-elastic theory, the dynamic thermal
and elastic responses of a piezoelectric rod fixed at both ends and subjected to a moving heat source
are investigated. The generalized piezoelectric-thermoelastic coupled governing equations are
formulated. By means of Laplace transformation and numerical Laplace inversion the governing
equations are solved. Numerical calculation for stress, displacement and temperature within the rod
is carried out and displayed graphically. The effect of moving heat source speed on temperature,
stress and temperature is studied. It is found from the distributions that the temperature, thermally
induced displacement and stress of the rod are found to decrease at large source speed.
Buckling analysis is a technique used to determine buckling load and buckled mode shape. Buckling load is the critical load at which a structure becomes unstable while buckled mode shape is the characteristic shape associated with a structure's buckled response. In this paper, the elastic thermal buckling of a heated cyclic symmetry structure is carried out by means of finite element method. The buckling cyclic symmetry analysis is focused on a ring-strut-ring structure which is extensively used as a basic element in rotating machines. The linear eigenvalue buckling analysis is adopted to determine the buckling response with the temperature change of the structure.
two-dimensional problem in electromagneto-thermoelasticity for a thermally and
electrically conducting half-space solid whose surface is subjected to a time-dependent heat is
studied in the context of Lord and Shulman theory. The solid is placed in an initial magnetic field
parallel to the plane boundary of the half-space. The normal mode analysis is used to obtain the
exact expressions for the considered variables. The results of the considered variables are
represented graphically. From the distributions it can be found the coupled effect and thermal wave
effect.
Based on the generalized thermoelastic theory postulated by Green and Lindsay(G-L), the dynamic response of an infinite rotating piezoelectric plate subject to thermal shocks on both up and bottom surfaces was investigated. To avoid the calculation precision loss caused by the integral transform technique, the so-called direct finite element method was used to solve the governing equations in time domain directly. The distributions of the dimensionless temperature, stress, displacement and electric potential were presented graphically. The results show that the direct finite element method provides an effective way for achieving high calculation precision in solving the generalized piezoelectric-thermoelastic problem. The results also show that the rotation effect tends to decrease the dimensionless displacement and electric potential and barely affects the dimensionless temperature and stress.
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