ArticleMaterials (Basel, Switzerland)2026
A Novel Re-Entrant Honeycomb with Tunable Auxetic Response and Enhanced In-Plane Mechanical Performance.
Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Re-entrant honeycombs with tunable auxetic response have attracted increasing attention for energy absorption, yet their in-plane stiffness and load-bearing capacity are often limited by bending-dominated deformation and local instability. In this study, a re-entrant honeycomb with cosine-curved walls and X-shaped ligaments, denoted as X-CRS, was proposed to enhance the in-plane mechanical response and energy absorption performance. Three X-CRS configurations with different X-ligament angles were fabricated by fused deposition modeling using PLA and investigated through quasi-static compression tests and finite element simulations. The results show that the X-CRS-30 achieved the highest load-bearing performance, with approximate increases of 148%, 133%, and 102% in elastic modulus, collapse stress, and plateau stress, respectively, and the highest mean specific energy absorption (SEA) of 1.225 ± 0.015 kJ kg
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