PL3.1 - Zero group velocity and backward guided elastic waves
- Event
- 2025 ICU PADERBORN - 9th International Congress on Ultrasonics
2025-09-21 - 2025-09-25
Paderborn - Band
- Lectures
- Chapter
- Planary Talks
- Author(s)
- C. Prada - Institut Langevin, Paris (France)
- Pages
- 18 - 18
- DOI
- 10.5162/Ultrasonic2025/PL3.1
- ISBN
- 978-3-910600-08-9
- Price
- free
Abstract
Guided elastic waves involves the coupling of shear and compression waves at interfaces. Even in the simplest guides, such as homogeneous plates or cylinders, this complex interaction results in the existence of negative phase velocity branches. In the absence of attenuation or leakage, the minimum frequencies of such backward branches correspond to zero-group-velocity (ZGV) modes and are associated with narrow local resonances...