סמינר-מחלקתי-ביה"ס-להנדסה-מכאנית-Prof. Yonggang Huang

School of Mechanical Engineering Seminar
Monday, September 12, 2016 at 15:00
Wolfson Building of Mechanical Engineering, Room 206

MECHANICALLY GUIDED, DETERMINISTIC THREE-DIMENSIONAL ASSEMBLY

Prof. Yonggang Huang

Walter P. Murphy Professor

Dept. of Civil and Environmental Engineering (50% appointment)

Dept. of Mechanical Engineering (50% appointment)

Dept. of Materials Science and Engineering (courtesy appointment)

Northwestern University

Editor, Journal of Applied Mechanics (ASME Transactions)

Complex three-dimensional (3D) structures in biology (e.g., cytoskeletal webs, neural circuits, and vasculature networks) form naturally to provide essential functions in even the most basic forms of life.  Compelling opportunities exist for analogous 3D architectures in human-made devices, but design options are constrained by existing capabilities in materials growth and assembly.  We report routes to previously inaccessible classes of 3D constructs in advanced materials, including device-grade silicon.  The schemes involve geometric transformation of 2D micro/nanostructures into extended 3D layouts by compressive buckling.  Demonstrations include experimental and theoretical studies of more than 100 representative geometries, from single and multiple helices, toroids, and conical spirals to structures that resemble spherical baskets, cuboid cages, starbursts, flowers, scaffolds, fences, and frameworks, each with single- and/or multiple-level configurations.