Fatigue in 3D Printed Structures: A Multiscale Approach
The advanced manufacturing techniques have recently attracted significant attention both in industry and academia, specifically after the Advanced Manufacturing Initiative announcement. One of the key materials and processes for AM are metallic materials and metal forming techniques. Despite recent advanced, the full understanding of the relation between the feedstock material, processes parameters, and properties of the final product is still missing sue to the multiscale/multiphysics nature of AM techniques and complexity of the forming microstructures. The final property and performance of the manufactured parts subtly depend on the characteristics of the raw material and kinetics of the manufacturing process. We may refer to different hardness values for the samples with stray grains compared to columnar grains that form because of drawing process. Here we will use the mesoscale phase-fields approach to capture the microstructures that form during the multiscale metal forming processes, including the effect of interfaces grain orientations, size, and plasticity. This project tightly couples the experimental results to the phase-field simulations, enabling control of the metal forming process to achieve desired product performance and characteristics. The mathematical models and computation tools necessary to achieve this goal will be developed, including the ability to (i) import microstructure directly from experiment to the numerical model; (ii) capture the effect of interfaces; (iii) considering the size and scale-effects; (iv) plastic deformation; and (v) determining the microstructure-property relation. This in line with the goals of the STT1 (Multiscale Metal Forming and Pattern Replication) CIMM seed funding.
Principal Investigator: Momeni, Kasra Dr -- Mechanical Engineering
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