AI 中文总结
研究3D拓扑极化弹性超材料，通过含弯曲刚度的3D结构实现全向拓扑弹性，将零频状态提升为有限频模式，局域于单个边界，实验和数值结果证实其能实现强大非对称能量隔离，为3D超材料应用提供范例。
AI 中文摘要
拓扑极化弹性在低维空间已被广泛研究，但其三维对应物仍 largely 未被探索。本文展示了在包含弯曲刚度的3D结构中的全向拓扑弹性，将零频拓扑力学状态提升为有限频声子模式。这些模式局域在单个边界，在静态和有限频动态状态下都产生明显的刚度对比。该3D结构在所有空间维度都表现出高度极化的力学行为，建立了全向非对称拓扑弹性。实验和数值结果证实了由体拓扑极化和边界局域表面模式之间的相互作用产生的强大非对称能量隔离。我们的发现为3D超材料建立了一个范例，在振动屏蔽和定向波操纵方面有应用前景。
英文摘要
Topologically polarized elasticity has been extensively studied in lower-dimensions, yet its three-dimensional (3D) counterpart remains largely unexplored. Here, we demonstrate omnidirectional topological elasticity in 3D structures that incorporate bending stiffness, which elevates zero-frequency topological mechanical states into finite-frequency phononic modes. These modes are localized at a single boundary, creating a pronounced stiffness contrast in both static and finite-frequency dynamic regimes. This three-dimensional structure exhibits highly polarized mechanical behavior across all spatial dimensions, establishing omnidirectional asymmetric topological elasticity. Experimental and numerical results confirm robust, asymmetric energy isolation, arising from the interplay between bulk topological polarization and boundary-localized surface modes. Our findings establish a paradigm for 3D metamaterials, with promising applications in vibration shielding and directional wave manipulation.
Commentspublished in Science Advances, 28 pages, 14 figures
Journal refSci. Adv. 12 (29), eaec6144 (2026)
