Structure
As key innovation on the way to resilient metamaterials, their design, additive manufacturing and characterization are investigated in project group S (Structure). In particular, spinodoid structure, that offer great topological variety and the freedom to design non-periodic solid or shell-like architectures are focused. In addition, the absence of stress concentrators that deteriorate the mechanical performance of standard lattice-based metamaterials promises a significantly increased damage tolerance. While various design principles for resilient metamaterials are applied to spinodoid topologies, mechanical resilience is to be further improved by mimicking toughening mechanisms observed in natural materials. To this end, a novel binder jetting process for the fabrication of metamaterials that enables hybrid materials with tailored property profiles through infiltration sintering of the porous microstructures is developed. Complementary to the multiscale numerical modeling, the mechanical behavior of the additively processed new alloys and the corresponding metamaterials is experimentally characterized via advanced high-throughput indentation and 3D digital image correlation.