Nonlinear mechanics of a thin-walled honeycomb with zero Poisson’s ratio

• Autores: Leipeng Song, Hongjie Wang, Mingzhu Su, JingHai Wu, Xing Shen, Taoxi Wang, Zhiyong Yin
• Localización: Mechanics based design of structures and machines, ISSN 1539-7734, Vol. 51, Nº. 9, 2023, págs. 4977-4999
• Idioma: inglés
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• Resumen

  • The nonlinear, in-plane mechanics of a thin-walled honeycomb with zero Poisson’s ratio under large deformation is investigated in this paper. A theoretical method for calculating in-plane tensile modulus, modified factors of linear constitutive relations of the honeycomb structures with zero Poisson’s ratio is proposed based on the theory of Euler-Bernoulli beam and the bending theory of beam in large deflection, and a finite element simulation is given to validate. In addition, parametric analysis for revealing the impacts of geometrical configurations and material parameters on in-plane mechanical properties of the honeycombs have been studied systematically. These findings suggest that geometric and/or material parameters provide different contributions to the effective mechanical properties and lead to a separate design for the in-plane mechanical properties. After that, the effects of geometric and/or material nonlinearities on mechanical properties of the honeycomb structures with zero Poisson’s ratio are revealed by considering the dimensionless tangent stiffness of the honeycombs.