|About this Abstract
|MS&T21: Materials Science & Technology
|Additive Manufacturing Modeling and Simulation: Microstructure, Mechanics, and Process
|A Microstructure-informed Multiscale Computational Model for Additively Manufactured (AM) Metals and Alloys
|Chamara Herath, Ajit Achuthan
|On-Site Speaker (Planned)
The development of a multiscale computational modeling framework with a microstructure informed constitutive model and its implementation for additively manufactured materials with cellular sub-grain feature will be presented. The constitutive model is crystal plasticity based and accounts for the geometric and mechanistic effects of the grains and the cellular sub-grain feature. The cellular sub-grain feature is treated as tubular structures with hexagonal cross sections and grains are treated as columnar along the build direction. A multiscale homogenization of the local field quantities using generalized method of cells (GMC) micromechanics model is the crux of the framework. The GMC that captures the mechanical behavior of representative volume elements is linked to the macroscale Finite Element Analysis (FEA) model of the real-life-sized component using a Finite Element Analysis-Micromechanics Analysis Code (FEAMAC). The developed multiscale model is implemented on Calculix after integrating GMC and validated by simulating the performance of an aero-space component.