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Cross-Scale Engineering of Nano and Microstructures; Hybridization of Multi-Scale Experiments and High Performance
Cross-Scale Engineering of Nano and Microstructures; Hybridization of Multi-Scale Experiments and High Performance
Tuesday, September 1st at 3:00 PM to 4:00 PM in 190 Engineering Sciences Building
Speaker: Professor Kyung-Suk Kim (Brown University)
Host: Professors Petros Sofronis and John Lambros
Abstract
In the past decade, the engineering community has begun to develop and enhance the capabilities of technological devices and systems based on nano and microstructures. New discoveries and new inventions are emerging in cross-scale engineering of nano and microstructures, hybridizing supercomputing simulations and scale-bridging experiments. As an example, discovery of a new carbon nanotube scission mechanism caused by ultrasonication, atom shooting scission, and its potential impact will be introduced first. The discovery is based on large-scale supercomputing simulations of carbon nanotube scission processes in water- sonication and corresponding scale bridging experiments. The MD simulations of the sonication induced CNT scission employ Brenner's REBO potential for carbon bonds and TIP-4P potential for water molecules. Ultrasonication experiments guided by high performance computing made it possible to reveal the computationally observed atom shooting scission mechanism. Another example based on such hybridization is the analysis of the ion-beam irradiation growth of nano-porous thin amorphous carbon films on a PDMS compliant substrate. These amorphous carbon thin film materials are being developed for renewable energy and clean environment technology applications. Computational modeling includes MD simulations of ion beam irradiation and anisotropic growth of thin films, and FEM analysis of large amplitude asymmetric buckling of thin films on a compliant substrate. The computational modeling has been carried out concurrently with scale bridging experiments for the film growth processes.
About the Speaker
Kyung-Suk Kim is currently a Professor of Engineering and member of Solids and Structures Group at Brown University, directing the Nano and Micromechanics Laboratory.
He received B.S. ('74) and M.S. ('76) degrees in Mechanical Engineering from Seoul National University, and Ph.D. ('80) degree in Solid Mechanics from Brown University.
After he spent one year ('79-'80) at California Institute of Technology as a Research Fellow in Aeronautics department, he taught as the department of Theoretical and Applied Mechanics, University of Illinois, Urbana-Champaign as Assistant and Associate Professor.
Since 1989 he has been Professor of Engineering at Brown University. He also held visiting faculty positions at Harvard University, Cambridge University, U.K., University of California, Santa Barbara and Distinguished Visiting Scholar at KIST.
Professor Kim has been working as an engineering scientist, as an inventor, and as an educator to contribute to the rapidly evolving society. His research interest is in an interdisciplinary area, solid mechanics of small scale material structures; nano and micromechanics of solids. For his research he has invested several new scientific instruments and analytical methods.
Host: Professors Petros Sofronis and John Lambros
This seminar counts towards the requirement for ME 590, TAM 500 and AE 590