The subject of the research outlined herein is the investigation of anisotropic plate lattice structures with high weight-specific stiffness and strength to be manufactured within the LPBF process. Three lattice unit cells are designed, with the first one intended for tension/compression loading, the second one for shear loading and the third one for a combined loading scenario. The elastic homogenized material properties are determined using FEM with unit cell models and periodic boundary conditions (PBC). Subsequently, an investigation of the stability behavior of the lattice structures is conducted using various modeling approaches with different representative volume elements.

To evaluate the lightweight potential of the developed lattice structures, their effective elastic material properties are compared to those of a honeycomb structure. The work demonstrates that using anisotropic structural behavior enables the development of plate lattice structures characterized by a comparatively simple and for the LPBF process manufacturing-friendly cell architecture, high weight-specific stiffness, and consequently, significant lightweight potential. The stability analysis reveals that in all lattice structures, plastic deformation initiates before linear buckling occurs. It is shown that by selecting appropriate representative volume elements, reduced models with PBC can be employed for buckling analysis instead of more complex multi cell models. Furthermore, the weight-specific strength of the plate lattice structures is evaluated and it is shown that stress concentrations can be significantly reduced through the deliberate implementation of radii. Simultaneously, the radii lead to an increase in weight-specific stiffness. It will be shown, that plate lattice structures with a wall thickness of 0.2 mm can be manufactured using the LPBF process with AlSi10Mg powder. The subject of further research will be the experimental investigation of the lattice plate structure.