Guided acoustic waves at periodically structured edges: Linear modes and nonlinear generation of Lamb and surface waves

• Published in: Journal of sound and vibration Vol. 527; p. 116854
• Main Authors: Nedospasov, Ilya A., Pupyrev, Pavel D., Bechler, Nikolaus, Tham, Jingxue, Kuznetsova, Iren E., Mayer, Andreas P.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Ltd 09.06.2022; Elsevier Science Ltd
• Subjects: Brillouin zones; Edge waves; Elastic bodies; Elastic media; Elastic plates; Elastic properties; Finite element analysis; Finite element method; Grooves; Group velocity; Inclusions; Materials elasticity; Nonlinear equations; Nonlinearity; Periodic structures; Phononic crystal; Propagation modes; Radiation; Sound waves; Surface acoustic waves; Surface waves; Wave generation; Wedge waves; Finite element method; Phononic crystal; Nonlinearity; Edge waves; Wedge waves

•Acoustic waves guided at periodically structured edges and wedge tips were studied.•Dispersion relation and displacements computed for periodic notches/inclusions.•Second harmonic of a wedge/edge mode radiates energy into the bulk/plate.•Zero-group velocity points in the dispersion branches of edge...