Novel lattice concept with geometrically forced auxeticity
Year: 2026
Type: conference-paper
Abstract: Metamaterials are widely used structures for their outstanding and unique properties. Metamaterials can exhibit properties beyond those of the original material, one of the most significant ones being negative Poisson’s ratio; in other words: auxeticity. The re-entrant honeycomb is one of the earliest and most well-known auxetic structures with enhanced energy absorption capacity. The structure regrettably buckles under compressive load, resulting in its loss of compressive resistance. Auxeticity can be restored or even sustained with clever geometric design. In this study, a clever yet simple geometric design is introduced which is based on the original re-entrant structure. The novel concept forces the re-entrant edges via an arrowhead shape connection to move inward resulting in sustained auxetic behaviour under compressive loading. The novel concept is tested and compared against the original structure in terms of deformation behaviour and mechanical properties in a finite element test environment.
Authors: Levente Széles, Richárd Horváth
Institution: Obuda University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7204169917