3D-printed bio-inspired zero Poisson’s ratio graded metamaterials with high energy absorption performance

Abstract This study aims at introducing a number of two-dimensional (2D) re-entrant based zero Poisson’s ratio (ZPR) graded metamaterials for energy absorption applications. The metamaterials’ designs are inspired by the 2D image DNA molecule. inspiration indicates how unit cell must be patterned along with two orthogonal directions to obtain ZPR behavior. Also, much capacity can enhanced taking slots and horizontal beams into account molecule’s base pairs. comprise multi-stiffness cells, so-called soft stiff cells. variability in cells’ stiffness is caused specific design A finite element analysis (FEA) employed simulate deformation patterns ZPRs. Following that, meta-structures fabricated 3D printing TPU as hyperelastic materials validate FEA results. good correlation observed between experimental numerical results show that due presence mechanisms densifications adjustable under quasi-static compression. structure designed on pairs, F?, exhibits highest capacity. Apart from diversity metamaterial designs, effect multi-thickness walls also evaluated. wall thicknesses leads boosting In this regard, ‘E’ enhances up 33% than its counterpart constant thicknesses. Finally, comparison terms stability newly ZPRs, traditional auxetic performed, approving superiority over both ZPRs metamaterials.