Abstract
Nondestructive evaluation of adhesively bonded interfaces is of high importance to ensure the structural integrity. In this study, the adhesive interface is modeled as a nonlinear spring interface, and the guided wave propagation in a laminated plate is studied numerically using the finite volume method. Continuous harmonic wave excitation is given at the end of the laminate plate, and the amplitude of a generated second-harmonic guided mode is evaluated using the two-dimensional Fourier transform. As a result, it is found that the amplitude ratio of the second-harmonic mode and the fundamental mode increases monotonically at a certain frequency, which is close to the frequency satisfying the theoretical phase-matching condition.
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