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.
