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Symposia

ACHIEVING MORE WITH LESS: ADDITIVE MANUFACTURING His work on architected metamaterials has been selected as one of the
OF MULTI-FUNCTIONAL ARCHITECTED MATERIALS top 10 innovations of 2015 by MIT Technology Review. He received the Air
Force Young Investigator Award, Inventor’s Award and ICTAS Junior
Xiaoyu “Rayne” Zheng Faculty Award, Director’s Award for Publication Excellence from LLNL,
Assistant Professor Best Paper Award from IEEE Sensor Conference, and the Outstanding
Department of Mechanical Engineering Doctoral Dissertation Award.
Department of Material Science and Engineering
Macromolecules Innovation Institute
Virginia Tech

Abstract

Material properties are constrained by their intrinsic composition and
spatial arrangement of crystal structure. This fundamentally limits material
properties with respect to each other creating trade-offs when selecting
materials for specific applications.

We create materials with combinations of previously unachievable
properties: 3D architected metamaterials. These new class of architected
materials are comprised of interconnected 3D hierarchical micro-
structures as designed “atoms” and “molecules” as in natural materials to
reach previously unachievable white space in the material selection chart.
I will discuss a suite of scalable additive micro- and nano manufacturing
technologies to enable fast manufacture of these ultralight metamaterials
in polymer, metals, ceramics and nanocomposites. Attention is focused on
how we design and synthesize traditionally unprocessable organic/
inorganic building blocks, and proliferating them into macroscopic
dimensions with hierarchical 3D features spanning from tens of
nanometers, to micrometers, centimeters and above. Next, we examine
the potential to introduce designed-in attributes from disparate physical
property domains into metamaterials. These attributes include lightweight,
flexibility, fracture resistant, high temperature resistant, sensing and
actuation, which could transform our ability to tailor new properties and
functions out of a single artificial material building block, rather than
relying on multiple components.

Biography

Dr. Xiaoyu “Rayne” Zheng is an Assistant Professor of Mechanical
Engineering at Virginia Tech and directs the Advanced Manufacturing and
Metamaterials Laboratory. His group draws from the principles of
mechanics, optics and material science to develop the next generation of
additive manufacturing techniques and processes capable of arbitrary,
hierarchical 3D architected materials for multiple applications. Prior to
joining Virginia Techhe was a Member of Technical Staff and Principle
Investigator at DOE Lawrence Livermore National Laboratory in the San
Francisco Bay Area, where he worked on high volume additive
manufacturing initiatives and materials with controlled micro-architectures
(DARPA MCMA). He received his Ph.D. degree in Mechanical Engineering
from Boston University in 2011 with the Outstanding Dissertation Award on
developing optical-mechanical microsystems for cellular force probing.
Zheng has published over 40 journal articles, proceeding papers and
book chapters, including cover articles on Science and Nature Materials.

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