Fusheng Han
Institute of Solid State Physics-CAS, China
Title: Enhanced compressive mechanical properties of auxetic lattice structures filled with polymer
Biography
Biography: Fusheng Han
Abstract
Auxetic lattice structures are a type of special lattice structures exhibiting negative Poisson's ratio and unique mechanical properties. Currently, most auxetic lattice structures are made of non-metallic materials, such as
polymers, rubbers and so on, resulting in limited applications. In this study, an aluminum based auxetic structure is prepared through compressed air infiltration technology, and based on this lattice structure; two composites are
also fabricated by filling the pores of lattice structure with different epoxies. It is shown that, by composite route, the lattice structure is pronouncedly enhanced. The flow stress is increased by more than three to five times compared with that of original lattice structures, depending on the strength of fillers. This enhancement is due to the restriction of fillers to the deformation of struts and uniform stress distribution resulted from the viscoelastic characteristics of epoxy.