Investigation of the elastic behavior of reciprocal systems using homogenization techniques

Lorenzo Greco (1) , Arthur Lebée (2) , Cyril Douthe (3)

1 University of Pisa - Università di Pisa
2 msa - Matériaux et Structures Architecturés
3 IFSTTAR/MAST/EMMS - Expérimentation et Modélisation des Matériaux et des Structures

In this paper, the authors endeavour to develop design formulas for reciprocal systems using homogenization techniques. The theoretical background for homogenizing periodic beams systems as Kirchhoff-Love plates is first recalled. Then it is applied to a square reciprocal system. It is found that only biaxial bending (i.e. positive Gaussian curvature) generates stress inside the beams so that the equivalent plate model is a degenerated Kirchhoff-Love which is fully detailed. Then, some optimal configurations are investigated in terms of bending stiffness and strength. Finally, in order to validate the approach, full finite element simulations of simply supported reciprocal systems on square boundaries are compared with the homogenized solution previously derived. The convergence of the model and its accuracy for reasonable scale ratio is confirmed. Nexorade, Homogenization, Periodic plates, Space frame

Mots clés: HOMOGENEISATION; PLAQUE; ELASTICITE

Domaines: Mécanique des structures [physics.class-ph]; Mécanique des structures [physics.class-ph]

Lorenzo Greco, Arthur Lebée, Cyril Douthe. Investigation of the elastic behavior of reciprocal systems using homogenization techniques. 2013 IASS Annual Symposium : Beyond the Limit of Man, Sep 2013, Wroclaw, Poland. 9 p. ⟨hal-01063705⟩