Analysis of laser-generated ultrasonic force source at specimen surface and display of bulk wave in transversely isotropic plate by numerical method

Analysis of quantitative relationship between laser-generated guided waves and the adhesive interface by the numerical method

“…The finite element method (FEM) is versatile in dealing with laser-generated ultrasonic waves due to its flexibility in modeling complicated geometries and its capability in obtaining full field numerical solutions. Many researchers utilized FEM to analyze the laser-generated ultrasound in different occasions, and their numerical results are in good agreement with the experimental data [10–12]. In this work, the propagation problems about laser-generated guided waves in multi-layered adhesive structures have been solved with the FEM based on an implicit integration rule to integrate the thermoelastic coupled equations in a dynamic analysis.…”

“…Ultrasonic methods based on Lamb wave inspection are of great interest to inspect the wide range of materials and configurations used in the multi-layered adhesive structures. However, with the interpretation of the ultrasonic signals, understanding guided wave propagation in adhesive structures and interaction with discontinuities is often difficult [10,11]. The finite element method (FEM) is versatile in dealing with laser-generated ultrasonic waves due to its flexibility in modeling complicated geometries and its capability in obtaining full field numerical solutions.…”

Characteristics of laser ultrasound interaction with multi-layered dissimilar metals adhesive interface by numerical simulation

“…The finite element method (FEM) is versatile in dealing with laser-generated ultrasonic waves due to its flexibility in modeling complicated geometries and its capability in obtaining full field numerical solutions. Many researchers utilized FEM to analyze the laser-generated ultrasound in different occasions [13][14][15][16]. Therefore, this paper mainly investigates the interaction of laser induced ultrasonic waves with the interface of three-layered adhesive structures of steel-epoxy-lead by FEM.…”