Development and Validation of a Dynamic Model of Magneto Active Elastomer Actuation of the Origami Waterbomb Base

Abstract

Of special interest in the growing field of origami engineering is selffolding, wherein a material is able to fold itself in response to an applied field. In order to simulate the effect of active materials on an origamiinspired design, a dynamic model is needed. Ideally, the model would be an aid in determining how much active material is needed and where it should be placed to actuate the model to the desired position(s). A dynamic model of the origami waterbomb base, a wellknown and foundational origami mechanism, is developed using adams 2014, a commercial multibody dynamics software package. Creases are approximated as torsion springs with both stiffness and damping. The stiffness of an origami crease is calculated, and the dynamic model is verified using the waterbomb. An approximation of the torque produced by magnetoactive elastomers (MAEs) is calculated and is used to simulate MAEactuated selffolding of the waterbomb. Experimental validation of the selffolding waterbomb model is performed, verifying that the dynamic model is capable of accurate simulation of the fold angles.