Abstract

The article investigates the Lamb wave generation by the bonded piezoelectric (PZT) actuator and its travel within the orthotropic Carbon Fiber Reinforced Plastic (CFRP) plate. We consider the anisotropy of the plate elastic and damping properties, existence of the adhesive layer and dependence of the interfacial stress distribution on the surface between host plate and actuator on the anisotropy of the plate’s material, on the excited frequency, wavelength and plate’s thickness. Our investigation includes experimental determination of the elastic properties of CFRP, the wave attenuation, on the base of which the models of anisotropic material damping and the Finite Element (FE) implementation of transient wave generation, propagation and attenuation have been proposed. The proposed results can be used at the design of Structural Health Monitoring (SHM) for the composite structures with the structural anisotropy and damping, to make a reasonable choice of the frequency, type, dimensions and optimum placement of the actuators and sensors.

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