séminaire : Stochastic Multiresolution Analysis of Materials

Jeudi 6 mai à 14h00, le Prof. Wing Kam LIU de la Northwestern University présentra ses travaux sur la Stochastic Multiresolution Analysis of Materials lors d'un séminaire.

RDV salle 601, Bâtiment 6, entrée A-B.



Stochastic Multiresolution Analysis of Materials
Wing Kam Liu, Walter P. Murphy Professor,
Northwestern University, Department of Mechanical Engineering
World Class University Professor at SKKU

In the not too distant future, it may be possible to create an integrated multiscale analysis system for the design of a reliable engineering device for a predetermined lifetime. Such a capability is currently missing. We will demonstrate this proposed stochastic multiresolution analysis of materials framework via two examples: micro/nano-structured materials design, and nanodiamond platforms for therapeutic applications.     

The key to developing advanced materials is the establishment of an understanding of the interplay between the various physical scales present. By designing material microstructure intelligently, we may hope to create new materials with desired combinations of strength, toughness, electrical, and density, among other properties. A rigorous stochastic mathematical framework for multiscale modeling will help to make super-lightweight, ultra-strength, low-wear materials a reality of everyday life – for energy related, industrial, and medical applications alike. In materials engineering, rather than discovering materials by chance and exploiting their properties, the goal is to develop a comprehensive understanding of microstructure-properties relationships in order to systematically design materials with specific desired properties.

Current research efforts focus on the use of nanodiamonds (NDs) as a drug carrier for advanced drug delivery and diagnostic systems. In order for the device to work properly, it is extremely necessary to understand the physical and chemical attributes of NDs, drugs, and bio-molecules. While the properties of the drug- and bio-molecules are well explored, many crucial properties of NDs are still unknown, such as the equilibrium structure of NDs as well as the type of charges and the nature of the functional groups present on the surface of the ND.  A bio-chemo-atomistic framework for this system is being developed utilizing current modeling and experimental measurements, and this mathematical framework serves also as an adaptive model that will continue to update as computational and experimental capabilities are improved. 



Dr. Wing Kam Liu, Walter P. Murphy Professor of Mechanical Engineering at Northwestern University, Chair of the ASME K&C Nanotechnology Council, and Co-Director of the NSF Summer Institute on Nano Mechanics, Nano Materials and Nano/Micro Manufacturing, received his B.S. from the University of Illinois at Chicago; his M.S. and Ph.D. both from Caltech. He is a world leader in multiscale simulation-based engineering and science and has applied a spectrum of atomistic, quantum, and continuum strategies towards the understanding and design of nano-materials, biological processes, and recently the use of nano-materials for diagnostic and therapeutic applications. The impact of his research contributions is attested by the large number of citations to his work (as of January 2010, over 8,000 according to Institute for Scientific Information (ISI) with an H-factor of 43; over 10,000 according to Google). In 2001, he was cited by the ISI as “one of the most highly cited, influential researchers in Engineering, and an original member highly cited researchers database”. Selected honors include the Robert Henry Thurston Lecture Award, the Gustus L. Larson Memorial Award, the Dedicated Service Award, the Pi Tau Sigma Gold Medal and the Melville Medal, (all from ASME); the John von Neumann Medal and the Computational Structural Mechanics Award from the US Association of Computational Mechanics (USACM); and the Computational Mechanics Awards of the International Association of Computational Mechanics (IACM) and the Japanese Society of Mechanical Engineers. Liu chaired the ASME Applied Mechanics Division and is past president of USACM. He is the editor of two International Journals and honorary editor of two journals and has been a consultant for more than 20 organizations. Liu has written three books; the Meshfree Particle Methods book sets the standard in the field, the Finite element book becomes a classic, and the Nano Mechanics and Materials book received a very favorable review by Nanotoday (Nov, 2006). Liu is a Fellow of ASME, ASCE, USACM, AAM, and IACM.