Woodruff School of Mechanical Engineering
Mechanics of Materials Seminar
Assembly of micro/nanomaterials into complex, three-dimensional architectures by compressive buckling
Dr. Yonggang Huang
Thursday, April 23, 2015 at 1:00:00 PM
MRDC Building, Room 4211
Dr. H. Jerry Qi
Complex, three dimensional (3D) structures in biology (e.g. cytoskeletal webs, neural circuits, vasculature networks) form naturally to provide essential functions in even the most basic forms of life. Compelling opportunities exist for analogous 3D architectures in man-made devices, but design options are constrained by existing capabilities in materials growth and assembly. Here we report routes to previously inaccessible classes of 3D constructs in advanced materials, including device-grade silicon. The schemes involve geometric transformation of two dimensional (2D) micro/nanostructures into extended 3D layouts by compressive buckling. Demonstrations include experimental and theoretical studies of more than forty 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.
Dr. Yonggang Huang is the Joseph Cumming Professor of Mechanical Engineering and Civil and Environmental Engineering at Northwestern University. He has broad interests in many branches of Engineering Science and has established mechanics models for advanced technology. He has published 1 book and more than 400 journal papers and book chapters, including multi-disciplinary journals Science (2006, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015), Nature (2008, 2013), and 42 papers in the top mechanics journal JMPS. His recent awards include the Larson Award in 2003, Melville Medal in 2004, Richards Award in 2010, and Drucker Medal in 2013, all from ASME; Young Investigator Medal from the Society of Engineering Sciences in 2006; International Journal of Plasticity Medal in 2007; Guggenheim Fellowship from the John Simon Guggenheim Foundation in 2008; and ISI Highly Cited Researcher in Engineering in 2009 and ISI Highly Cited Researcher in Materials Science in 2014. He is the Editor of Journal of Applied Mechanics (Transactions of ASME).
Refreshments will be served.