In-plane elasticity of a multi re-entrant auxetic honeycomb. (15th November 2017)

• Record Type: Journal Article
• Authors: Harkati, E.; Daoudi, N.; Bezazi, A.; Haddad, A.; Scarpa, F.
• Is Part Of: Composite structures. Volume 180(2017)
• Page Start: 130
• Page End: 139
• Publication Date: 2017-11-15
• Subjects: Honeycomb -- Homogenization -- Elastic moduli -- Auxetic -- Refined model; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2017.08.014
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: Honeycomb structures are essentially constituted of a repetition of regularly-arranged and loaded sub-structures. The present study carries out a parametrically investigation of the behavior of a multi re-entrant honeycomb structure with variable stiffness and Poisson's ratio effects. A refined analytical model is specifically developed and compared to full-scale numerical simulations. The analytical model developed is based on energy theorems and takes into full consideration bending, shearing and membrane effects. The influence of the cell walls thickness on the elastic homogenized constants is investigated. The results obtained show a good agreement between the refined analytical approach developed and the numerical computations carried out.