Abstract
The process of photoacoustic response formation in inhomogeneous objects is analyzed. In a quasi-static case, the photoacoustic image is formed predominantly due to inhomogeneities in the thermoelastic coupling coefficient. Expressions describing thermoelastic strains in an inhomogeneous object with allowance for the inhomogeneous thermoelastic coupling coefficient in the general form are obtained within the framework of a three-dimensional model using the perturbation theory. A comparative analysis is performed for the process of photoacoustic image formation in various regimes of piezoelectric sensor operation. The results are used to explain the behavior of a photoacoustic signal at the ends of vertical cracks.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call