BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Talks.cam//talks.cam.ac.uk// X-WR-CALNAME:Talks.cam BEGIN:VEVENT SUMMARY:Leveraging vibrations\, nonlinear dynamics\, and wave phenomena in emerging fields and across disciplines - Prof Alper Erturk\, Carl Ring Family Chair &\; Professor of Mechanical Engineering\, Georgia Institu te of Technology DTSTART:20230216T120000Z DTEND:20230216T130000Z UID:TALK194023@talks.cam.ac.uk CONTACT:Hilde Hambro DESCRIPTION:This talk will review our efforts on exploiting nonlinear dyna mics\, as well as vibration and elastic/acoustic wave phenomena\, in engin eering problems. First\, we will discuss vibration energy harvesting using piezoelectricity for low-power electricity generation\, with a focus on e lectroelastic dynamics and leveraging designed nonlinearities for bandwidt h enhancement\, followed by a brief account of inherent material\, dissipa tive\, and circuit nonlinearities. Experimental results will be compared a gainst model simulations using the method of harmonic balance. Multiphysic s problems of energy harvesting from fluid-structure interaction\, and mul tifunctional concepts such as energy-harvesting bioinspired robotic fish w ill also be presented. After that\, we will discuss mechanical and electro mechanical metamaterials and metastructures for vibration/wave attenuation \, including a recently introduced general theory\, followed by piezoelect ric metamaterials with digital programming enabled by synthetic impedance circuits. Bandgap (attenuation frequency range) tuning\, rainbow phenomeno n\, wave compression\, wave mode conversion\, and reciprocity breaking wil l be demonstrated for elastic waves through spatial and spatiotemporal pro gramming. Nonlinear metastructures exploiting chaotic vibrations will also be introduced. Our recent efforts on using analog and digital piezoelectr ic shunt circuits will then be shown for vibration attenuation in structur es via concepts like nonlinear energy sink and basic Duffing-type nonlinea r circuits. Finally\, we will discuss examples on higher frequency problem s including gradient-index phononic crystals lens designs for elastic and bulk acoustic/ultrasonic waves\, wireless ultrasonic power and data transf er\, and leveraging vibrations/vibroacoustics and guided waves in the huma n skull-brain system. \n\nBio: Prof. Alper Erturk is the Carl Ring Family Chair in the Woodruff School of Mechanical Engineering at Georgia Tech. Hi s theoretical and experimental research interests are in dynamics\, vibrat ion\, and acoustics of passive and active structures for various engineeri ng problems. His publication/presentation record includes more than 130 jo urnal papers\, 220 conference papers/abstracts\, 5 book chapters\, and 2 b ooks (total citations > 20\,000 and h-index: 63). He is a recipient of var ious awards including the NSF CAREER Award in Dynamical Systems\, ASME C.D . Mote Jr. Early Career Award for “research excellence in the field of v ibration and acoustics”\, ASME Gary Anderson Early Achievement Award for “notable contributions to the field of adaptive structures and material systems”\, SEM James Dally Young Investigator Award for “research exc ellence in the field of experimental mechanics”\, and numerous best pape r awards including the Philip E. Doak Award of the Journal of Sound and Vi bration\, among others. He is an Associate Editor for various journals suc h as Smart Materials & Structures (IOP) and Journal of Vibration & Acousti cs (ASME) – and he was recently named the next Editor-in-Chief of Smart Materials & Structures\, effective January 2023. He holds Invited/Adjunct Professor positions at Politecnico di Milano (POLIMI) and at Korea Advance d Institute of Science and Technology (KAIST). He is a Fellow of ASME and SPIE.\n LOCATION:Department of Engineering - LR6 END:VEVENT END:VCALENDAR