THIS TALK is CANCELED.

This is a part of GT MAP activities. There will be light refreshments through out the event.

3PM - 3:45PM  Prof. Glaucio Paulino will give a talk

3:45PM -- 4:00PM Break with Discussions

4:00PM - 4:25PM   the second talk

4:25PM - 5PM Discussion of open problems stemming from the presentations.

Bio] Prof. Glaucio Paulino is Raymond Allen Jones Chair and Professor in the School of Civil and Environmental Engineering.   He received the M.S. degree in Theoretical and Applied Mechanics, and Ph.D. degree in Civil Engineering from Cornell University in 1995, the M.S. degee in Civil Engineering (with Honors) from PUC-Rio, Brazil, and B.S degree in  Civil Engineering from University of Brasilia (UnB), Brazil.  He was a faculty member at Univerisity of California, Davis (1997-2001) and University of Illinois at Urbana-Champaign (2002-present), Acting Program Director in Nano and Bio Mechanics at NSF (2009-2010) and Program Director in Mechanics of Materials at NSF (2009-present), and joined Georgia Tech in 2015.  

Paulino's group's contributions in the area of computational mechanics spans development of methodologies to characterize deformation and fracture behavior of existing and emerging materials and structural systems, topology optimization for large-scale and multiscale/multiphysics problems, and origami.  Selected Active research area includes Polygonal Finite Elements and it's application to structural topology optimization, Reliability based design and Topology optimization, Topology optimization applied to design of high-rise buildings, Multiresolution Topology optimization, Potential-based cohesive model, Adaptive mech refinement and coarsening of Dynamic cohesive Fracture, Unified Library of nonlinear solution schemes, and Topological data structure for finite elevment mesh representation.

3:00PM - 3:45PM  Prof. Massimo Ruzzene (AE & ME) will give a talk on  "Time-Reversal and Reciprocity Breaking in Electromechanical Metamaterials and Structural Lattics."

3:45PM -- 4:00PM Break with Discussions

4:00PM - 4:25PM  Dr. Raj Kumar Pal will give the second talk

4:25PM - 5PM Discussion of open problems stemming from the presentations.

Talk Title]

Time-Reversal and Reciprocity Breaking in Electromechanical Metamaterials and Structural Lattices

Abstract]

Recent breakthroughs in condensed matter physics are opening new directions in band engineering and wave manipulation. Specifically, challenging the notions of reciprocity, time-reversal symmetry and sensitivity to defects in wave propagation may disrupt ways in which mechanical and acoustic metamaterials are designed and employed, and may enable totally new functionalities. Non-reciprocity and topologically protected wave propagation will have profound implications on how stimuli and information are transmitted within materials, or how energy can be guided and steered so that its effects may be controlled or mitigated.

The seminar will briefly introduce the state-of-the-art in this emerging field, and will present initial investigations on concepts exploiting electro-mechanical coupling and chiral and non-local interactions in mechanical lattices. Shunted piezo-electric patches are exploited to achieve time-modulated mechanical properties which lead to one-directional wave propagation in one-dimensional mechanical waveguides. A framework to realize helical edge states in two identical lattices with interlayer coupling is also presented. The methodology systematically leads to mechanical lattices that exhibit one-way, edge-bound, defect-immune, non-reciprocal wave motion. The presented concepts find potential application in vibration reduction, noise control or stress wave mitigation systems, and as part of surface acoustic wave devices capable of isolator, gyrator and circulator-like functions on compact acoustic platforms.

Bio] 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 is the Program Director for the Dynamics, Control and System Diagnostics Program of CMMI at the National Science Foundation.

3:00 PM - 3:45PM  Prof. Ting Zhu will give a talk on "Multiscale and Multiphysics Modeling of Materials".

3:45PM -- 4:00PM Break with Discussions

4:00PM - 4:25PM Continuing talk

4:25PM - 5PM Discussion of open problems stemming from the presentations.

Talk Title]

Multiscale and Multiphysics Modeling of Materials

Abstract]

Multiscale and multiphysics materials modeling addresses the challenging materials problems that involve multiple physical phenomena at multiple spatial and temporal scales. In this talk, I will present the multiscale and mulphysics models developed in my research group with a recent focus on energy storage materials and advanced structure materials. Our study of rechargeable lithium ion batteries for energy storage applications reveals a rich spectrum of electrochemically-induced mechanical degradation phenomena. The work involves a tight coupling between multiscale chemomechanical modeling and in situ nanobattery testing. Our study of nanostructured metals and alloys elucidates the effects of nanostructures on the size-dependent ultrahigh strengths and surface/interface mediated deformation mechanisms. Finally, I will present my perspectives on the multiscale and multiphysics modeling that requires a synergistic integration of engineering physics and applied mathematics, in order to design the advanced structural and functional materials to realize their potential to the full.

Bio] Ting Zhu is a professor and a Woodruff Faculty Fellow in the George W. Woodruff School of Mechanical Engineering at Georgia Institute of Technology. He also holds a joint appointment in the School of Materials Science and Engineering at Georgia Tech. He received his Ph.D. in Mechanical Engineering from Massachusetts Institute of Technology in 2004. He worked as a postdoctoral associate at Harvard University, before joining Georgia Tech in 2005. His research is focused on mechanics and materials modeling. He receives the Sia Nemat-Nasser Early Career Award from the American Society of Mechanical Engineers (ASME) in 2013 and the Young Investigator Medal from the Society of Engineering Science in 2014. Zhu is an ASME Fellow.

View the event PHOTOS.

3PM - 3:15PM Launching Remarks

3:15PM - 4:00PM Prof. Magnus Egerstedt (GT ECE) will give a talk on

          "Distributed Control of Multi-Robot Systems"

4:00PM -- 4:15PM Break with Discussions

4:15PM - 4:35PM   Dr. Zak Costello (GT ECE) will give the second talk on

            "From Global Properties to Local Interaction Rules"

4:35PM - 5PM Discussion of open problems stemming from the presentations.

BIO] Prof. Magnus Egerstedt is the Schlumberger Professor in the School of Electrical and Computer Engineering at the Georgia Institute of Technology, where he serves as Associate Chair for Research and External Affairs. He received the M.S. degree in Engineering Physics and the Ph.D. degree in Applied Mathematics from the Royal Institute of Technology, Stockholm, Sweden, the B.A. degree in Philosophy from Stockholm University, and was a Postdoctoral Scholar at Harvard University. Dr. Egerstedt is the director of the Georgia Robotics and Intelligent Systems Laboratory (GRITS Lab), where he conducts research in the areas of control theory and robotics, with particular focus on control and coordination of complex networks, such as multi-robot systems, mobile sensor networks, and cyber-physical systems. Magnus Egerstedt is a Fellow of the IEEE, and has received a number of teaching and research awards, including the Ragazzini Award from the American Automatic Control Council, the Outstanding Doctoral Advisor Award and the HKN Outstanding Teacher Award from Georgia Tech, the Alum of the Year Award from the Royal Institute of Technology, and the CAREER Award from the U.S. National Science Foundation.