Numerical modeling of the deformation behavior of polymer lattice structures with a density gradient based on additive technologies

The mechanical behavior of graded lattice structures whose geometry is created on the basis of the analytical determination of three-dimensional triply periodic minimal surfaces (TPMS) is investigated. Several homogeneous and graded lattice models with different types of representative volume geometry and gradient parameters are considered. The numerical models are validated with data obtained experimentally using the Vic-3D Micro-DIC video system. The results of numerical simulation of the deformation behavior of gradient structures with the Shoen G (gyroid) TPMS geometry under uniaxial compression are presented. The influence of structure parameters and gradient properties on the mechanical behavior is studied.