Browsing by Subject "generative design"
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Item DESIGN FOR INTERNAL LATTICE STRUCTURES WITH APPLICATION IN ADDITIVE MANUFACTURING(University of Texas at Austin, 2023) Palomino, Donald; McClelland, Ryan; Grau, Mike; Watkins, Ryan; Li, BingbingInternal lattice structures have the potential to significantly reduce the mass of an existing metal component, which is a desirable characteristic in the aerospace and automobile industries. However, there are still uncertainties on whether or not internal lattice structures can outperform a solid version of the same mass. Additionally, internal lattice structures can only be produced via additive manufacturing methods, bringing more challenges to resolve. To determine the viability of internal lattice structures, a study will be performed to compare its performance with solid, hollow, and mass penalty designs of equivalent masses using Autodesk Fusion 360. A performance baseline will be established by running multiple simulations on simple geometries to obtain the maximum displacement, first four modes, and first buckling mode. A generative design part, better known within NASA Goddard Space Flight Center as A15, will undergo the same simulations and have its results analyzed to determine feasibility.Item Digital Microfluidic Design for Injection Continuous Liquid Interface Production of 3D Objects(2022) Lipkowitz, Gabriel; Samuelsen, Tim; Hsiao, Kaiwen; Dulay, Maria T.; Coates, Ian; Pan, William; Shaqfeh, Eric S.G.; DeSimone, Joseph M.In additive manufacturing, it is imperative to increase print speeds, use higher viscosity resins, and print with multiple different resins simultaneously. To this end, we introduce a new UV-based photopolymerization 3D printing process exploiting a continuous liquid interface—the deadzone—mechanically fed with resin at elevated pressures through microfluidic channels dynamically created and integral to the growing part. Through such mass transport control, injection continuous liquid interface production, or iCLIP, accelerates printing speeds 5 to 10-fold over current methods such as continuous liquid interface production (CLIP), can utilize resins an order of magnitude more viscous than can CLIP, and can readily pattern a single heterogeneous object with different resins in all Cartesian coordinates. We characterize the process parameters governing iCLIP and demonstrate use-cases for rapidly printing carbon nanotube-filled composites, multi-material features with length scales spanning several orders of magnitude, and lattices with tuneable moduli and energy absorption.