Thermo-elastic behavior of thin sandwich panel made of piezoelectric layers

摘要

A model for a layered thin plate called Sandwich structure is studied in the context of theory of generalized thermopiezoelasticity. The governing equations are solved using Laplace transform and the inverses of the Laplace transform are obtained numerically. The solution obtained was applied to the plate of Sandwich structure, which is thermally shocked. The results show that the presence of piezoelectricity almost removes the discontinuity from the displacement distributions curve. Comparison between the coupled thermoelasticity theory and the generalized thermoelasticity shows that the generalized thermoelasticity theory predicts a finite speed of the wave propagation specially the wave propagation of the heat even in the presence of piezoelectricity.The results obtained are presented in graphical forms and are compared with the previous results in the case where the piezoelectric effects were absent. The comparison is excellent.