RETRACTED: Continuum model for effective properties of orthotropic octet-truss lattice through additive manufacturing (Retracted Article)

Cellular materials, often called lattice materials, are increasingly receiving attention for their ultralight structures with high specific strength, excellent impact absorption, acoustic insulation, heat dissipation media, and compact heat exchangers. In line with emerging additive manufacturing (AM) technology, realization of the structural applications of the lattice materials appears to be becoming faster. Considering the direction-dependent material properties of the products with AM, by directionally dependent printing resolution, effective moduli of lattice structures appear to be directionally dependent. In this paper, we develop a constitutive model of a lattice structure, which is an octet-truss with a base material having an orthotropic material property considering AM. Case studies, simulations, and experimental validations are conducted on effective properties of octet lattice structures under uniaxial compression to validate the continuum model. The proposed model seems to be for good reason with the validations. New direction-dependent continuum models were proposed for the effective properties of octet lattice under uniaxial compression and tension.