Photoacoustic section imaging is a method for visualizing structures with optical contrast in selected layers of an extended object. In order to avoid resolution limitations that are due to commonly used ultrasound detectors of finite size, we propose the use of extended, integrating cylindrical elements for focusing the acoustic detection into the selected section. Two imaging methods based on...

A novel Spectral Element (SE) is formulated to capture surface acoustic wave (SAW) in layered piezoelectric materials when subjected to mechanical loading or piezo-electrical actuation. Conventional modeling of layers by time domain Finite Elements (FEs) for wave propagation analysis requires solving large systems (as the element sizes should be approximately 8 elements per wavelength). This pr...

This paper presents an analytical model for investigating the effect of debonding between piezoelectric actuators/sensors and the host beam on the sensing and actuating behaviour. In this model, both flexural and longitudinal displacements of the host beam and the piezoelectric layers are considered using classical beam theory. For the adhesive layer, only through-thickness peel strain and tran...

The purpose of this work is to control the vibration of the plate with the help of fuzzy logic controller. A finite element model of a two-dimensional plate instrumented with a piezoelectric patches sensor-actuator pair is derived. As mesh size (8x8) is found best for the future modeling and analysis of the plate has been taken. The contribution of piezoelectric sensor and actuator layers on th...

The dielectric properties of newly synthesized Ag0.1Cu0.9InP2S6 crystals were investigated in broad frequency (20 Hz – 1 MHz) and temperature range (110 K – 350 K). Anomaly in the temperature dependence of a complex dielectric permittivity indicating the polar phase transition was detected at the temperature 283 K . The dielectric properties of the presented crystal are mainly caused by conduct...