Adhesive Layer Effects in Surface-Mounted Piezoelectric Actuators

Abstract

The role of the adhesive layers in active panels with surface-mounted (bonded) piezoelectric layers is studied. The investigation focuses on the strain transfer mechanism between the active layers and the host structure, the stress concentrations involved, and the influence of the geometrical and mechanical properties of the adhesive layers on the static response of the panel. The analysis is based on the High-Order approach and uses 2D elasticity to model the adhesive layers. The mathematical formulation is derived using variational principles, compatibility requirements, and the piezoelectric constitutive equations. Confirmation of the analytical model is achieved through an experimental study that reveals good agreement between the theoretical predictions and the behavior of the active structure. Numerical results are presented for a typical piezoelectric active panel and compared to detailed 2D finite element analysis. The results reveal the high-order effects and the stress concentrations in the transition zone near the edge of the panel and indicate that a careful selection of the adhesive's properties can improve the behavior of the structure and reduce the severity of the stress concentrations involved. The paper concludes with a summary and recommendations for the analysis, design, and use of smart structures with bonded actuators.

A model‐based method for damage detection with guided waves

“…This means that identical free‐from‐defect structures with the same material properties could have completely different baseline signal responses because of slight and uncontrollable differences in the bond layer. The same conclusion was derived in a number of past studies focusing on different aspects or inconsistencies of PZT installation procedures, such as variations in the mechanical properties of the adhesive sourced from different batches .…”

A modified pin force model for beams with active material bonded

“…Exhaustive reviews on PFM series models can be found in Inman and Cudney [12], Alzahrani and Alghamdi [13]. Besides, more sophisticated models were proposed including various nonlinear factors, such as temperature [14], material properties [15], adhesive layer [16,17], various load [18], coupling factor [19], etc. In contrast to the development of these models, the pin-force series models have been stuck in the EPFM stage for years.…”

Visco-piezo-elastic parameter estimation in laminated plate structures

“…During the last few years, several numerical models have been developed for the simulation of active structures with piezoelectric sensors and actuators, both surface or embedded ones [1,2]. The effect of the adhesive materials in the static or dynamic response in this type of structure has been studied experimentally [3] and numerical models taking into account the behaviour and properties of the adhesive materials have been proposed [4][5][6].…”