Fecha: Viernes, 5 de noviembre de 2010
Lugar: Seminario 1, 4ª planta, ETSICCP Granada (Politécnico de Fuentenueva)
Horario: 12:30. Asistencia libre
Descripción: Seminario a cargo del Prof. David L. McDowell (Regents’ Professor, School of Materials Science and Engineering. Woodruff School of Mechanical Engineering. Georgia Institute of Technology, Atlanta, GA USA), dentro de las actividades del «Seminario José Antonio García García».
El Seminario José Antonio García García es un punto de encuentro para divulgar la actualidad en investigación, tanto en nuestro medio como en otros centros de referencia, destinado tanto a académicos como a alumnos. Para estimular la participación de los alumnos, se concederá 1 crédito de Libre Configuración por la asistencia y presentación de un comentario personal a 5 seminarios durante el curso académico.
Resumen del seminario: Multiscale modeling has a range of end uses, and typically addresses a desire to incorporate fine scale phenomena in coarse scale modeling and simulation. Many applications in applied sciences only require bottom-up approaches. However, designing materials for targeted performance requirements demands a combined strategy of bottom-up and top-down modeling, simulation, and systems engineering. With time, the classical materials selection approach is becoming generalized by concurrent design of microstructure or mesostructure to satisfy product-level performance requirements. Computational materials science and multiscale mechanics models play key roles in evaluating performance metrics necessary to support materials design. The interplay of hierarchical systems-based design of materials with multiscale modeling methodologies is at the core of materials design. In high performance alloys and composite materials, maximum performance is often achieved within a relatively narrow window of processing and resulting microstructures. This talk explores design of materials with hierarchical microstructures and identifies some key issues. Components of a practical approach for robust design of materials to achieve specified functionality are presented. A strategy is presented for using bottom-up parametric simulations and experiments to map process-structure-property-performance relations, applying elements of set theory to search viable inverse top-down pathways that relate performance requirements to microstructure, while addressing various sources of uncertainty. The need for multiscale models of microstructure-property relations (in space and time) will be discussed, with some discussion of model utility. Various schemes for multiscale modeling are considered, exploring the distinction between needs and goals of multiscale models and materials design, considering propagation of uncertainty.
Perfil del Dr. David L. McDowell: Dr. David L. McDowell joined Georgia Tech in Fall 1983. Regents’ Professor and Carter N. Paden, Jr. Distinguished Chair in Metals Processing, McDowell holds a dual appointment in the GWW School of Mechanical Engineering and in the School of Materials Science and Engineering. He has served as Director of the Mechanical Properties Research Laboratory since 1992, and as Chair of the Georgia Tech Materials Council since 1994. McDowell’s research topics of interest include generalized continuum theory for gradient plasticity and more general classes of evolving microstructure, microstructure-sensitive computational approaches to variability in fatigue of advanced alloy systems, constitutive equations and design of energetic metal powder systems and ultra high performance concrete under shock loading, atomistic simulations of dislocation nucleation and mediation at grain boundaries, atomistic simulations of dealloying of nanoporous solids, multiscale computational coarse graining/homogenization methods ranging from molecular dynamics to higher length and time scale continuum theory transitions, and principles and approaches for systems-based computational materials design. McDowell current serves on the editorial boards of several journals, and is co-Editor of the International Journal of Fatigue. He is Co-Director of the NSF-sponsored Center for Computational Materials Design, a joint Penn State-Georgia Tech I/UCRC.
Organiza: Seminario José Antonio García García
Más información: www.ugr.es/~sjagg