Topological Edge States in Reconfigurable Multi-stable Mechanical Metamaterials
arxiv(2024)
摘要
Multi-stable mechanical structures find cutting-edge applications across
various domains due to their reconfigurability, which offers innovative
possibilities for engineering and technology advancements. This study explores
the emergence of topological states in a one-dimensional chain-like
multi-stable mechanical metamaterial composed of bistable units through a
combination of mechanical and optical experiments. Drawing inspiration from the
SSH (Su-Schrieffer-Heeger) model in condensed matter physics, we leverage the
unique mechanical properties of the reconfigurable ligament-oscillator
metamaterial to engineer a system with coexisting topological phases. Based on
the one-dimensional periodic bistable chain, there is an exponential decay
diffusion of elastic energy from both end boundaries towards the interior of
the body. Experimental characterizations demonstrate the existence of stable
topological phases within the reconfigurable multi-stable mechanical
metamaterial. The findings underscore the potential of reconfigurable
mechanical metamaterials as versatile platforms for flexibly exploring and
manipulating topological phenomena, with applications ranging from impact
resistance to energy harvesting and information processing.
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