Jeong, ECalius, ERamezani, M2026-03-022026-03-022024-10-30Advanced Materials Technologies, ISSN: 2365-709X (Print); 2365-709X (Online), Wiley. doi: 10.1002/admt.2024006142365-709X2365-709Xhttp://hdl.handle.net/10292/20706This study introduces a novel frictional mechanical metamaterial composed of a central hexagon or re-entrant honeycomb frame, a lower section with four tapered columns, and an upper portion with a blade shape. When subjected to an external uniaxial force, the 3D structure of the metamaterial utilizes sliding interactions to dissipate frictional energy. The mechanical properties of the proposed metamaterial, such as load-displacement relationships, hysteresis area, and peak force, can be fine-tuned by adjusting geometric parameters and constituent materials. Extensive analysis is conducted through experimental compression tests, finite element (FE) simulations, and theoretical modeling. Comparative assessments of the metamaterial's energy dissipation performance demonstrated a good agreement between experimental and simulation results, with minor variations observed for deeper compression cycles. The proposed metamaterial offers the potential for superior elastic energy absorption and dissipation, making it a promising solution for applications requiring repeated energy dissipation or damping under cyclical loads while maintaining a lightweight profile.© 2024 The Author(s). Advanced Materials Technologies published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.3403 Macromolecular and Materials Chemistry40 Engineering34 Chemical Sciences7 Affordable and Clean Energy34 Chemical sciences40 Engineering51 Physical scienceselastic energy dissipationfrictional metamaterialhexagonal and re-entrant unit cellsJournal ArticleOpenAccess10.1002/admt.202400614