Abstract
Origami-inspired structures and materials have shown great potential in engineering fields, but encounter some dynamic issues. Conventional research on folding sequence, kinematics, and static analysis is not sufficient to effectively predict the dynamic behavior of origami structures, therefore, an accurate and processible dynamic model is necessary. This paper discusses the effects of different modeling techniques on the static/dynamic behavior of origami structures. Stacked Miura-origami is selected as the research platform to study the effects of different modeling techniques on the static and dynamic characteristics of origami structures. Quasi-static tests and dynamic experiments are first carried out to provide data for modeling purposes. The force-displacement constitution relationships and dynamic responses under harmonic excitation are then studied and compared. It indicates that under low external excitation energy, the response amplitude is closely related to the tangent stiffness at the steady-state equilibrium position, which is related to the accuracy of the constitution curves. Nevertheless, the proposed models show different dynamic behaviors when the excitation frequency is increased, in some circumstances, the response even exceeds the kinematic limits. A complete parameter study is necessary to advance the state of the art of dynamic modeling for origami structures based on different techniques in the future. This paper presents a fundamental understanding of the dynamic modeling of origami structures, and the results are beneficial to provide a guide for establishing an accurate and processible dynamic model.
