Mechanical Engineering Seminar
Tuesday, April 24, 2018
10:15 a.m., 3540 Engineering Building
Refreshments Served at 10:00 a.m.
Turning Thermal Expansion in Mechanical Metamaterials
Professor of Mechanical Engineering
McGill University Canada
Abstract: Thermal expansion can be problematic in manifold applications that require thermal stability, yet it can also be purposely exploited to meet specific requirements of thermal deformation. In this seminar, I will report routes to systematically engineer thermally responsive metamaterials that can be either very stiff or highly deformable. On these fronts, concepts of multiscale mechanics, crystallography and trajectory control will be used to present two schemes that are validated through experiments. The first is for three-dimensional lattices with high specific stiffness, and it enables to program the magnitude and spatial directionality of their thermal expansion. The second targeting shape transformations in planar metamaterials assists in encoding global reconfigurations that are macroscopically reversible under temperature. Some practical examples where these concepts can be readily applied include deployable satellites, morphing components, and actuation devices, among others.
Bio: Damiano Pasini is professor of Mechanical Engineering at McGill University. He received a master in structural engineering from the University of Pavia and a PhD in mechanical engineering from the University of Bristol, UK. After a Marie-Curie Postdoctoral Fellowship at the Institute of Structural Mechanics of the German Aerospace Center in Braunschweig, he joined McGill in 2004, and since then he has been a faculty member. His research interests lie in solid mechanics, advanced materials and structural optimization with current focus on mechanical metamaterials. He is fully engaged in understanding their mechanics, introducing reliable predictive models, and using them to engineer, build and test architected materials with tunable and functional properties that are of practical use especially in aerospace and medicine.