Seminar: Internally Resonating Metamaterials for Wave and Vibration Control

Dr. Massimo Ruzzene, Georgia Institute of Technology

All dates for this event occur in the past.

E001 Scott Lab
E001 Scott Lab
201 W. 19th Ave.
Columbus, OH 43210
United States

Metamaterials consist of engineered microstructural assemblies that exhibit superior properties in comparison to less-composed or naturally-occurring materials. Their unusual wave properties include band-gap behavior, response directionality, left-handedness, and negative acoustic refraction, among others. These features, and their application for the design of acoustic filters, waveguides, logic ports, and ultrasonic transducer arrays, motivate the investigation of elastic wave propagation in micro-structured media. The talk illustrates the band gap and directional properties of periodic media, as defined by their ability to direct waves in preferential direction and at specified frequencies. Such properties are first illustrated on simple spring-mass systems, and subsequently demonstrated in complex structural lattices operating in linear and nonlinear deformation regimes. In addition, periodic arrays of electromechanical resonators and lattices that undergo topological changes resulting from structural instabilities are discussed as examples of adaptive metamaterials. Tunable local resonating systems and local instabilities are investigated as effective means to provide the considered periodic assemblies with adaptive band-gaps and wave steering characteristics, which are very effective for vibration and noise control.

About the Speaker

Massimo Ruzzene is a Professor in the Schools of Aerospace and Mechanical Engineering at Georgia Institute of Technology. He received a PhD in Mechanical Engineering from the Politecnico di Torino (Italy) in 1999. He is author of 2 books, 140 journal papers and about 180 conference papers. He has participated as a PI or co-PI in various research projects funded by the Air Force Office of Scientific Research (AFOSR), the Army Research Office (ARO), the Office of Naval Research (ONR), NASA, the US Army, US Navy, DARPA, the National Science Foundation (NSF), as well as companies such as Boeing, Eurocopter, Raytheon, Corning and TRW. Most of his current and past research work has focused on solid mechanics, structural dynamics and wave propagation with application to structural health monitoring, metamaterials, and vibration and noise control. M. Ruzzene is a Fellow of ASME, an Associate Fellow of AIAA, and a member of AHS, and ASA. He served as Program Director for the Dynamics, Control and System Diagnostics Program of CMMI at the National Science Foundation between 2014 and 2016.

Hosted by Professor Ryan Harne