In-plane elastic constants of a new curved cell walls honeycomb concept. (April 2020)

• Record Type: Journal Article
• Authors: Harkati, A.; Boutagouga, D.; Harkati, E.; Bezazi, A.; Scarpa, F.; Ouisse, M.
• Is Part Of: Thin-walled structures. Volume 149(2020)
• Publication Date: 2020-04
• Subjects: Honeycomb -- Homogenization -- Curvature walls -- Elasticity moduli -- Auxetic -- Refined model; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2020.106613
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: This paper is focused on the identification of the in-plane elastic constants of a new design of auxetic (negative Poisson's ratio) honeycomb configuration with curved cell walls by using analytical and numerical homogenization techniques. The sensitivity of the elastic constants is determined against the various cell geometry parameters. Good agreement between the analytical and numerical simulations is observed. We show that the specific curved wall honeycomb configuration proposed in this paper possesses a high in-plane shear compliance, tailored anisotropy and the possibility of inducing a negative Poisson's ratio behaviour in baseline honeycomb configurations that would have otherwise positive in-plane Poisson's ratios. Highlights: New refined analytical model for the in-plane elastic constants of the curved wall centresymmetric honeycomb. High shear compliance of the honeycomb proposed compared to other centresymmetric configurations. High degree of tailoring the auxetic effect and the anisotropy.