Colloquium: Tijs de Boer (SI&C)

29 mei 2017 12:45 - Locatie: Room D, Faculty of Aerospace Engineering, Kluyverweg 1, Delft.

Fracture Toughness of Aerospace Structures On the Use of Redundant Lattice Structures

Both experimental and numerical studies have shown that the crack-bridging is one of the most significant mechanism contributing to the fracture toughness natural materials like nacre and bone. This study aims to explore if additive manufactured lattice structures can be used to bridge fatigue cracks as well, thereby improving the fracture toughness of aerospace structures. By using enlarged Selective Laster Sintered unit cells, the response under mix-mode loading of five different unit cells was studied. Numerical models were used to give further understanding of the stiffness, fatigue response, and crack bridging capability of a redundant lattice core.