Abstract
Origami has been exploited to various marvelous materials to manifest mechanical properties. In this study, inspired by the distinctive deformation modes of kresling-origami with rotation limitation, a design strategy of embedding kresling-origami into conventional honeycomb for improving energy absorption capacity is proposed. According to different embedding approaches, i.e., replacing or adding cell walls, two types of origami-embedded honeycombs are constructed. To investigate the energy absorption properties of proposed origami-embedded honeycombs, 3D-printed specimens are manufactured and tested under quasi-static compression. The experiment results show that proposed origami-embedded honeycomb have higher specific energy absorption and three-axial comparable energy absorption performance relative to conventional ones. It indicates the design strategy of embedding kresling-origami is practical for improving energy absorption capacity of conventional honeycomb and weakening its anisotropy. In addition, the energy absorption performance of origami-embedded honeycombs with different geometrical configurations is investigated through an established and experimentally validated numerical simulation model. Furthermore, the mechanism (i.e., high energy-absorbing deformation modes of kresling-origami under boundary constraints) of embedding design strategy is clarified via comparison analysis between experiments and simulations. This strategy carves out a novel way to optimize the mechanical properties of honeycomb and may inspire new innovations of metamaterials.
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