Thermal excitation as a mean for nondestructive evaluation of embedded piezoelectric transducers

摘要

In this work, we present analytical and finite element method (FEM) modeling to describe the time dependence of the pyroelectric current of embedded piezoelectrics generated by a laser pulse. Analytical solutions of the one-dimensional heat transfer equation consider a two-layer model, account for the experimentally derived heat pulse shape and the heat loss to the environment. They serve as a proof of the more complex FEM modeling which allows the consideration of three-layer models. It provides an understanding of the heat transfer in structurally complex devices excited by laser pulses.