Vol. 2, No. 2, 2007

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ISSN: 1559-3959
Single member actuation of kagome lattice structures

Anthony C. H. Leung and Simon D. Guest

Vol. 2 (2007), No. 2, 303–317
Abstract

The two-dimensional kagome lattice has been shown to be a promising basis for active shape-changing structures, having both low actuation resistance and high passive stiffness. Activation of some members results in a global macroscopic shape change. Small deformation models show that the kagome lattice’s properties are critically dependent on its initial geometry. This paper investigates the fundamental actuation properties of a kagome lattice subject to single-member actuation, particularly when geometric nonlinearity is introduced with large actuation strains. Actuation resistance is found to be lowered with expansive actuation; a limiting peak actuation stiffness is observed when the actuator is flexible. Conversely, actuation resistance is found to increase with contractile actuation.

Keywords
kagome lattice, morphing, actuation
Milestones
Received: 28 April 2006
Accepted: 5 December 2006
Published: 1 April 2007
Authors
Anthony C. H. Leung
Department of Engineering
University of Cambridge
Trumpington Street
Cambridge CB2 1PZ
United Kingdom
Simon D. Guest
Department of Engineering
University of Cambridge
Trumpington Street
Cambridge CB2 1PZ
United Kingdom
http://www.eng.cam.ac.uk/~sdg