Caglar Oskay delivered an invited talk at NCSU – 2/17/2023
Lecture Title: Computational Multiscale Mechanics for Connecting Microstructure and Mechanical Properties of Additively Manufactured Metals
Location: Mechanical and Aerospace Engineering Department, North Carolina State University, Raleigh, NC.
Abstract:
Additive manufacturing promises to achieve unprecedented mechanical properties and performance in engineered systems by providing the ability to co-design the material and the structure. Achieving the confidence level to design such novel engineered systems as close as possible to their limit states (i.e., near failure) is needed to fully leverage these properties, optimizing performance, cost, and reliability. In this talk, we will discuss new multiscale modeling and simulation strategies that allow the quantification of the relationships between the microstructure of additively manufactured (AM) metals and their mechanical performance. We will discuss new reduced order multiscale modeling approaches that allow us to perform physics-based prediction of the material response fast – fast enough to facilitate quantification of uncertainty in the material response. We will demonstrate the computational efficiency and accuracy characteristics of the proposed simulation methods for static and fatigue failure response of AM metals. Fatigue performance is of particular interest as fatigue life of AM components is both sensitive to the defect distribution induced by the manufacturing process, and shows significant variability from component to component.