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MEAM Seminar: “Nonlinear Mechanical Behavior of Kirigami-inspired Architected Materials”
December 6, 2022 at 10:00 AM - 11:30 AM
As 3D printing and other advanced manufacturing techniques have become more common, it is increasingly possible to produce structures with nearly arbitrary internal geometric and compositional features, opening up vast new design space for engineers. In this work, we consider a kirigami-inspired, flexible architected material comprising rotating squares joined at their vertices. The rotational degrees of freedom result in significant structural compliance due to the large internal rotations of the squares. While the static properties of these structures (such as their auxetic characteristics) have been studied extensively, much less work has been done on their dynamic properties, especially nonlinear dynamic properties induced by large movement of internal components. Here, we examine the nonlinear static and dynamic responses of these systems, including the propagation of vector solitons and transition waves, and collisions of these nonlinear waves. Finally, we discuss how stimuli-responsive materials can be integrated with the nonlinearities of kirigami-inspired architected materials to enable autonomous behaviors, including movement and control of trajectory, as well as mechanical computing, which enables “information processing” to be treated as a material property.
Jordan R. Raney
Assistant Professor, Department of Mechanical Engineering & Applied Mechanics, University of Pennsylvania
Jordan R. Raney is an Assistant Professor in the Department of Mechanical Engineering & Applied Mechanics at the University of Pennsylvania, which he joined in 2016. He received a B.S. in Physics and a B.S. in Computer Science from the University of Minnesota, before joining the staff at MIT Lincoln Laboratory. Subsequently, he attended Caltech for graduate school, where he received a M.S. and Ph.D. in Materials Science. Before joining Penn, he was a postdoctoral fellow at Harvard, in the John A. Paulson School of Engineering & Applied Sciences and the Wyss Institute for Biologically Inspired Engineering. At Penn, his research focuses on experimental mechanics and additive manufacturing of novel composites and material architectures, including hierarchical, heterogeneous, fibrous, and soft systems.