Lattice structures are promising materials in the terms of energy absorption, acoustic and vibrational damping, high strength-to-weight ratios thermal management capabilities. In particular, auxetic lattice structures, among others, show absorption performances due to their characteristic negative Poisson’s ratio. this study, it is aimed compare deformation mechanisms under quasi-static crush l...

Scale separation is often assumed in most homogenization-based topology optimization (TO) frameworks for design of material microstructures. This work goes beyond the mainstream TO contributions by abandoning scale hypothesis. First, it puts to evidence limits approach when size Representative Volume Element (RVE) not negligible with respect structure. Then, a re-localized scheme bridging RVE a...

In this work, we investigated tessellating cellular (or lattice) structures for use in a low thermal expansion machine frame. We proposed concept lattice structure with tailorable effective coefficient of (CTE). The design is an assembly two parts: outer part and cylindrical inner part, which are made homogenous materials different positive CTEs. Several variations were their mechanical perform...