Multiscale phenomena in additively manufactured lattice and thin-wall structures (K. Hazeli, Univ. of Arizona)

Full-field mesoscale computational modeling of statistical volume elements, coupled with calibration and validation experiments, provides a pathway for establishing microstructure-property relationships in additively manufactured parts. However, the fildelity of these relationships is sensitive to the microstructure representation and grain scle constitutive model, especially in complex geometries, and must be properly characterized and understood. In this talk, I will present results from two projects highlighting existing challenges, recent progress and future directions of research in this filed. Part I of this talk demonstrates our approach to choosing an optimized combination of microstructure and topology that works efficiently for a specific condition in lattice structures. Part II examines the size effect in AM thin wall structures spanning from room temperature to elevated loading conditions. We specifically investigate the anomalous high-temperature size effect in Titanium and Nickel super alloys.