Abstract:This paper introduces a novel class of negative-stiffness (NS) core sandwich composite structures that exhibit unique mechanical performance, including shape recovery, superelasticity, and energy absorption in bending and shear mode. The core of these structures consists of a periodic cellular arrangement of double-curved beams (DCB) that undergo consecutive local snap-buckling transitions between multiple equilibrium states, enabling the structures to transition reversibly between their initial and deformed c… Show more
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