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Researchers: Yasuhiro Miyazawa, Dahun Lee, Seonghyun Kim
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Collaborators:
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Themes: Energy transfer in advanced structures
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resch_folding_blender0000-0120.mp4
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This research presents an innovative approach to impact mitigation through the use of Resch-patterned origami, which exhibits a unique, speed-dependent dynamic bifurcation. Unlike conventional materials with fixed geometries, this structure autonomously selects between two deformation pathways based on the applied impact velocity: a monostable folding mode that preserves structural integrity at lower speeds, and a bistable unfolding mode characterised by high-dissipation snap-through at higher speeds. Experimental validation using drop towers and large-scale mannequin impact tests demonstrates that this self-adaptive mechanism significantly reduces the coefficient of restitution (COR) and manages peak impact forces more effectively than traditional materials like expanded polystyrene (EPS) foam. Due to its localised mechanics and geometric programmability, this scalable design offers a robust foundation for next-generation adaptive robotics, smart protective armour, and aerospace damping systems.
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