Abstract
A technical note on ultrasonic excitation is transmitted from a PWAS into a thin-wall structure through the adhesive layer and it is distribution into the Lamb-wave modes existing in the structure has been demonstrated. The piezoelectrically induced strain is constant along the PWAS. The total stress in the structure is a superposition of symmetric (axial) and antisymmetric (flexural) stresses that have constant and linear displacement distributions across the thickness. The interfacial shear stress concentrates about the PWAS edges as the bond layer becomes thinner or stiffer. A closed-form solution for the case of a symmetric and an antisymmetric nonlinear mode and two generic guided-wave modes has also been developed. A closed-form solution for parameter Α and observed parameter is no longer constant, but varies with the frequency-thickness product.