Wednesday, October 3, 2018

2:30pm - 3:45pm

107 Surge Building - VT Campus

Dr. Philip Buskohl

Research Mechanical Engineer in Functional Materials Division 

U.S. Air Force Research Laboratory (AFRL)

Abstract:

Origami structures morph between 2D and 3D conformations along predetermined fold lines that efficiently program the form, function and mobility of the structure. By leveraging design concepts from action origami, a subset of origami art focused on kinematic mechanisms, reversible folding patterns for applications such as solar array packaging, tunable antennae, and deployable sensing platforms may be designed by networking actuator units. However, the enormity of the design space and the need to identify the requisite actuation forces within the structure places a severe limitation on design strategies based on intuition and geometry alone. To address this challenge, the AFRL origami team has developed computational design tools that predict the optimal fold topologies for target mechanical and electromagnetic performance criteria. Mechanics-based design results include the prediction of actuating mechanisms, auxetic origami and bistable structures, as well as the identification of additional building blocks for actuation and their optimized connectivity within a larger network. For the EM area, we have focused on the design of radio frequency selective surfaces that tune through the folding and unfolding of different types of origami tessellations. Together, these design tools offers an important step toward systematic incorporation of origami design concepts into new, novel and reconfigurable engineering devices.

Biography:

Philip R. Buskohl is a Research Mechanical Engineer in the Functional Materials Division at the U.S. Air Force Research Laboratory (AFRL).  The Division delivers materials and processing solutions to revolutionize AF capabilities in Survivability, Directed Energy, Reconnaissance, Integrated Energy and Human Performance.  Phil has authored over 22 peer-reviewed papers ranging from the mechanical properties of embryonic heart valve development, the chemical-mechanical feedback of self-oscillating gels and origami design. He is currently a member of the Flexible Electronics research team at AFRL, where he provides mechanical analysis and design concepts for conformal and deformable electronics packaging. He received his PhD degree in theoretical and applied mechanics from Cornell University in 2012.