The Elastic Uniaxial Properties of a Center Symmetric Honeycomb with Curved Cell Walls: Effect of Density and Curvature

• Published in: physica status solidi (b) 2017-12, Vol.254 (12), p.n/a
• Main Authors: Harkati, El Haddi, Daoudi, Nour El‐Houda, Abaidia, Chames Eddine, Bezazi, Abderrezak, Scarpa, Fabrizio
• Format: Article
• Language: English
• Subjects: auxetics; finite element method; honeycomb structure; negative Poisson's ratio
• ISSN: 0370-1972; 1521-3951
• DOI: 10.1002/pssb.201600818

We propose in this paper analytical and numerical models that describe the in‐plane uniaxial elastic properties (Young's moduli and Poisson's ratios) of a honeycomb structure with curved walls. We perform a parametric analysis of the mechanical performance of this honeycomb also by taking into account the different types of deformations acting inside the cell walls. The curved wall honeycomb possesses higher magnitudes of the Poisson's ratio ν12 in the auxetic configuration compared to classical center symmetric configuration with straight cell wall. The presence of the curvature also allows creating configurations with positive Poisson's ratio even for negative internal cell angles, and makes this honeycomb design attractive for mechanical tailoring. The in‐plane uniaxial elastic properties (Young's moduli and Poisson's ratios) of a honeycomb structure with curved walls are described. The curved‐wall honeycomb possesses higher magnitudes of the Poisson's ratio (PR) in the auxetic configuration (negative PR) compared to classical center‐symmetric configuration with straight cell wall. The presence of curvature also allows creating configurations with positive PR even for negative internal cell angles, and makes this honeycomb design attractive for mechanical tailoring.