Department News
Multiscale Methods for Materials Design and Bio-Na
Seminar Date
2005-04-18
Author
임아주
Date
2005-04-18
Views
1970
1. 제 목 : Multiscale Methods for Materials Design and Bio-Nano Interface
2. 연 사 : Wing Kam Liu, Walter P. Murphy Professor
Northwestern University, Department of Mechanical Engineering
3. 일 시 : 2005년 4월 18일 (월) 13:10
4. 장 소 : 서울대 신공학관(301동) 204호
5. 내 용 : The next generation of Computer-aided design (CAE) simulation software will integrate nano and micro structures into CAE capabilities and software for design and manufacturing. We propose an alternative concurrent bridging scale theory for the next generation of CAE software. In particular, we wish to extend current FEM software to incorporate the “concurrent” multi-physics in a single unified simulation. These are fundamentally necessary to account for the multiple scale behavior observed in material design. We briefly outline the development of hierarchical and concurrent multiple scale governing equations for heterogeneous systems, which include coupling of molecular dynamics and continuum, and its associated bridging scale simulation methods. We will then present bridging scale analysis of finite temperature of crack growth, design of Cybersteel 2020 for naval ships, and the proposed design of the next generation alloys for aero and auto applications.
The characterization and manipulation of complex biological systems has reached a stage to resolve various levels of details. The inner interaction mechanism at nano-scale will influence the properties in macro-scale. Two topics will be covered here: the rheology of red blood cell aggregation and electric field guided CNT and DNA assembly. We briefly outline the immersed finite element method coupled with multiphysics features such as protein molecular dynamics for solving a class of bio-nano-fluidics problems. We present a multiscale analysis of the blood flow--a complex fluid composed of deformable cells, proteins, platelets, and plasma. We then apply a multiphysics analysis of the composite electric field guided alignment of the carbon nanotube (CNT) and DNA. We aim to use this class of methods to assist the manipulation and characterization of nano scale biological objects, from molecular to cellular levels. We will also use our methods to predict the feasibility of various NEMS designs, i.e. carbon-biopolymer hybrid gel, or CNT force sensors. Our methods will also be used in different stages of the design, from the electro-separation of CNTs suspension, to viscoelastic modeling of cell motion in gel.
6. 약 력 : Walter P. Murphy Professor Wing Kam Liu received his B.S. from the University of Illinois at Chicago in 1976; his M.S. in 1977 and Ph.D. in 1981 both from Caltech. His research activities include concurrent and hierarchical bridging scale methods for computational mechanics, in particular, nano mechanics and materials, bio-nano interface, and multi-scale analysis. Selected Liu"s honors include the Gustus L. Larson Memorial Award (1995), the Pi Tau Sigma Gold Medal (1985) and the Melville Medal (1979), all from ASME; the Thomas J. Jaeger Prize (1989) by the International Association for Structural Mechanics in Reactor Technology, and the SAE Ralph R. Teetor Educational Award (1983), the US Association for Computational Mechanics (USACM) Computational Structural Mechanics Award (2001), the International Association for Computational Mechanics (IACM) Computational Mechanics Award (2002) and the Japan Society of Mechanical Engineers Computational Mechanics Award (2004). Liu serves on both the executive committee of the ASME Applied Mechanics Division and the International Association for Computational Mechanics. He was the past president of USACM. Liu is cited by Institute for Scientific Information (ISI) as one of the most highly cited, influential researchers in Engineering, and an original member, highly cited researchers database. He is the director of the NSF Summer Institute on Nano Mechanics and Materials.
7. 문 의 : 기계항공공학부 이정훈 교수 (☏880-9104)
2. 연 사 : Wing Kam Liu, Walter P. Murphy Professor
Northwestern University, Department of Mechanical Engineering
3. 일 시 : 2005년 4월 18일 (월) 13:10
4. 장 소 : 서울대 신공학관(301동) 204호
5. 내 용 : The next generation of Computer-aided design (CAE) simulation software will integrate nano and micro structures into CAE capabilities and software for design and manufacturing. We propose an alternative concurrent bridging scale theory for the next generation of CAE software. In particular, we wish to extend current FEM software to incorporate the “concurrent” multi-physics in a single unified simulation. These are fundamentally necessary to account for the multiple scale behavior observed in material design. We briefly outline the development of hierarchical and concurrent multiple scale governing equations for heterogeneous systems, which include coupling of molecular dynamics and continuum, and its associated bridging scale simulation methods. We will then present bridging scale analysis of finite temperature of crack growth, design of Cybersteel 2020 for naval ships, and the proposed design of the next generation alloys for aero and auto applications.
The characterization and manipulation of complex biological systems has reached a stage to resolve various levels of details. The inner interaction mechanism at nano-scale will influence the properties in macro-scale. Two topics will be covered here: the rheology of red blood cell aggregation and electric field guided CNT and DNA assembly. We briefly outline the immersed finite element method coupled with multiphysics features such as protein molecular dynamics for solving a class of bio-nano-fluidics problems. We present a multiscale analysis of the blood flow--a complex fluid composed of deformable cells, proteins, platelets, and plasma. We then apply a multiphysics analysis of the composite electric field guided alignment of the carbon nanotube (CNT) and DNA. We aim to use this class of methods to assist the manipulation and characterization of nano scale biological objects, from molecular to cellular levels. We will also use our methods to predict the feasibility of various NEMS designs, i.e. carbon-biopolymer hybrid gel, or CNT force sensors. Our methods will also be used in different stages of the design, from the electro-separation of CNTs suspension, to viscoelastic modeling of cell motion in gel.
6. 약 력 : Walter P. Murphy Professor Wing Kam Liu received his B.S. from the University of Illinois at Chicago in 1976; his M.S. in 1977 and Ph.D. in 1981 both from Caltech. His research activities include concurrent and hierarchical bridging scale methods for computational mechanics, in particular, nano mechanics and materials, bio-nano interface, and multi-scale analysis. Selected Liu"s honors include the Gustus L. Larson Memorial Award (1995), the Pi Tau Sigma Gold Medal (1985) and the Melville Medal (1979), all from ASME; the Thomas J. Jaeger Prize (1989) by the International Association for Structural Mechanics in Reactor Technology, and the SAE Ralph R. Teetor Educational Award (1983), the US Association for Computational Mechanics (USACM) Computational Structural Mechanics Award (2001), the International Association for Computational Mechanics (IACM) Computational Mechanics Award (2002) and the Japan Society of Mechanical Engineers Computational Mechanics Award (2004). Liu serves on both the executive committee of the ASME Applied Mechanics Division and the International Association for Computational Mechanics. He was the past president of USACM. Liu is cited by Institute for Scientific Information (ISI) as one of the most highly cited, influential researchers in Engineering, and an original member, highly cited researchers database. He is the director of the NSF Summer Institute on Nano Mechanics and Materials.
7. 문 의 : 기계항공공학부 이정훈 교수 (☏880-9104)
