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IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century


IASS Symposium 2016

SESSION: Structural Morphology

Method for customizing deployment motion through modifying Poisson's ratio

< Table of Contents for Structural Morphology
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Structural Morphology
  • Pages: 10
  • Title: Method for customizing deployment motion through modifying Poisson's ratio
  • Author(s): Janette Fernelius, Alden Yellowhorse, Spencer Magleby, Larry Howell
  • Keywords: origami tessellations, optimization, mechanical advantage
Abstract
Applying engineering principles to origami-based mechanical systems enables the control of certain properties, such as flexibility, bending stiffness, and deployment motion. Determining Poisson's ratio for deployable, rigid-foldable tessellation origami patterns provides a method to optimize the deployment motion of deployable structures and mechanisms that incorporate such patterns. Rigid-foldability requires that the mechanism can move between deployed and compact states without twisting or stretching the panels between creases. Mathematically modelling Poisson's ratio for these patterns enables engineers to select and modify tessellation fold patterns based on their potential behavior relative to engineering needs. This paper presents and discusses a method for calculating Poisson's ratio in terms of degree-of-deployment and is demonstrated for five origami tessellations. Modifications of the unit cell geometry of the tessellation are discussed and illustrate a method of tailoring patterns to obtain the desired deployment motion. Application of the mathematical models is also discussed.

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