Elastic Waves and Metamaterials: The Fundamentals

This book serves as an introductory text for students and engineers with limited knowledge of metamaterials (and elastic waves). This text begins with the most straightforward vibrating systems, such as single and 2-DOF spring-mass systems. It examines the observed phenomena in 2-DOF systems in an unconventional manner to prepare the reader for research on metamaterials. After presenting wave phenomena in an infinitely connected spring-mass system, an elastic bar, a continuous version of an infinite system, is analyzed. This instructional strategy, which progresses from the discrete model to the continuous model, facilitates efficient comprehension of wave and metamaterial concepts. Using continuous and discrete one-dimensional models, bending waves and their manipulation through metamaterials are also discussed. In the latter chapters of this book, advanced readers are introduced to the fundamental wave phenomena in two-dimensional media and wave manipulation using metamaterials, such as mode-converting transmission. As wave phenomena are the fundamental phenomena in vibrating structures, those interested in acoustics and vibration would gain a great deal of knowledge from this book, as the material covered in it offers a very different perspective on oscillatory phenomena than what is typically found in books on acoustics and vibration. Because this book presents a new technique for manipulating waves using metamaterials, engineers and scientists who work with (ultra)sounds and structural vibrations would find it very useful for expanding their knowledge of relevant topics.

Provides the critical knowledge in dealing with vibration/noise/ultrasound using simple one-dimensional models Explains a new way of manipulating vibration/noise/ultrasound using a metamaterial Includes many helpful illustrations (figures) to present the covered materials

Autorentext

Dr. Yoon Young Kim is a distinguished professor at Seoul National University (SNU), being a member of the Korean Academy of Science and Technology and the National Academy of Engineering, Korea. He was educated at SNU for his BS and MS and Stanford University for his Ph.D. His research is focused on elastic wave and metamaterials and design optimization. He served as the president of the Korean Society of Mechanical Engineers, a vice-president of Int. Society of Structural and Multidisciplinary Optimization (SMO), and the president of the Asian Society of SMO. He is an executive committee member of Int. Association for Computational Mechanics and was a co-chair of the World Congress on Computational Mechanics (2016). His recent awards include the JSCES (Japan Soceity for Computational Engineering and Science) Grand Prize (2022), the National Medal of Honor in Science and Technology (2021), the Mechanical Engineer of the Year (2019), Excellent Education Award of Dept. of Mech.Eng., SNU (2019), and SNU Research Excellence Award (2018).

Inhalt
Chapter 1- Introduction.- Chapter 2 Fundamentals.- Chapter 3 - Longitudinal waves in 1-D lattices.- Chapter 4 - Longitudinal waves in 1-D diatomic lattices.- Chapter 5 - Effective mass property manipulation in 1-D lattice systems.- Chapter 6. Metamaterials: effective property realization.- Chapter 7 - Longitudinal waves in 1-D continuum bars.- Chapter 8 - Flexural Waves in a Beam.- Chapter 9 - Wave manipulation in 2D elastic media using metamaterials.