Acoustic seminar | 26 January 2024

In recent years, there have been significant developments in phononic crystals and phononic crystals-based metamaterials, designed to manipulate elastic waves. Elastic waves are found in various applications, such as non-destructive testing, seismic imaging, and electronics. Phononic crystals are periodic structures that exhibit band gaps in the frequencies of elastic waves. This means they can block specific frequencies from passing through while allowing others to propagate. On the other hand, metamaterial is engineered to possess properties not found in nature, such as a negative refractive index. This unique property empowers them to manipulate elastic waves in previously unattainable ways. The potential applications of these materials are vast. Picture them in non-destructive testing, detecting defects in materials with heightened sensitivity, and in seismic imaging, envision them enhancing the resolution of underground structures.

This seminar will delve into the practical applications of phononic crystals and metamaterials, particularly in non-destructive testing and structural health monitoring. Some concepts for thermal sensing and low-frequency vibration suppression will be presented.