Index Catalog // Arch : Northwestern University Institutional Repository

Toward a Digital Twin of Metal Additive Manufacturing: Process Optimization and Control Enabled by Physics-based and Data-driven Models

Description:: In recent decades, metal additive manufacturing has seen rapid advancements, offering promising applications across various industries. However, addressing existing challenges in metal AM, such as process stability, defect avoidance, and quality control, is essential for fully exploiting its potential in fabricating parts with a desired geometry, as well as tailored...
Keyword:: Physics-based Model, Digital Twin, Data-driven Model, Machine Learning, and Additive Manufacturing
Subject:: Mechanical engineering
Creator:: Liao, Shuheng
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 05/31/2023
Date Created:: 2023-01-01
Resource Type:: Dissertation
Alternate Identifier:: http://dissertations.umi.com/northwestern:16572 and etdadmin_upload_985942

Establishing Process-Structure Relationships in Laser Powder Blown Directed Energy Deposition Through In-situ Investigation

Description:: Laser powder-blown directed energy deposition (DED) is an additive manufacturing process that utilizes a co-axial nozzle and laser to melt metal powders onto a substrate in a line-by-line fashion. This coupling gives rise to interactions between the laser, powder, and melt pool. To address fundamental process understanding, physical models were...
Keyword:: Additive Manufacturing
Subject:: Theoretical mathematics
Creator:: Webster, Samantha
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 09/22/2022
Date Created:: 2022-01-01
Resource Type:: Dissertation
Alternate Identifier:: etdadmin_upload_926973 and http://dissertations.umi.com/northwestern:16216

Addressing Speed-accuracy Trade-off in Additive Manufacturing for Optical Systems

Description:: Additive manufacturing (AM), also known as three-dimensional (3D) printing, has received considerable interests in recent years. It enables fabrication of complex, customizable parts that would otherwise be too expensive or impossible for traditional manufacturing methods. 3D printing encompasses a wide variety of processes, including photopolymerization, material extrusion, selective laser sintering,...
Keyword:: Optical Imaging System, Continuous Liquid Interface Production, and Additive Manufacturing
Subject:: Mechanical engineering
Creator:: Hai, Rihan
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 06/22/2022
Date Created:: 2022-01-01
Resource Type:: Dissertation
Alternate Identifier:: http://dissertations.umi.com/northwestern:16043 and etdadmin_upload_900931

Physics-Informed Data-Driven Prediction and Design in Advanced Manufacturing Processes

Description:: Manufacturing processes are known for their intricacies in changing material shapes and properties. New generations of manufacturing technologies, known as flexible manufacturing, are moving toward design freedom, which allows producing parts with optimized geometries and high customizations at an affordable cost even for low-volume productions. Two prominent flexible manufacturing processes...
Keyword:: Neural Network, Reinforcement Learning, Manufacturing, Additive Manufacturing, and Artificial Intelligence
Subject:: Computational physics, Mechanical engineering, and Computer science
Creator:: Mozaffar, Mojtaba
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 10/07/2021
Date Created:: 2021-01-01
Resource Type:: Dissertation
Alternate Identifier:: http://dissertations.umi.com/northwestern:15685 and etdadmin_upload_839531

Multi-scale Modeling of the Laser Powder-bed Fusion Additive Manufacturing Process

Description:: Additive manufacturing (AM) offers exciting advantages for the fabrication of metallic parts compared to traditional techniques, such as the ability to create complex geometries with less material waste. This is done by building arbitrary geometries in a layer-by-layer fashion, thereby giving the designer great control over the design of the...
Keyword:: Data-driven Modeling , Computational Fluid Dynamics, Finite Element Modeling, Additive Manufacturing, and Computational Mechanics
Subject:: Applied physics and Mechanical engineering
Creator:: Jones, Kevontrez
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 06/28/2021
Date Created:: 2021-01-01
Resource Type:: Dissertation
Alternate Identifier:: etdadmin_upload_807301 and http://dissertations.umi.com/northwestern:15507

Tailored Mechanical and Geometric Properties in Directed Energy Deposition via Global Thermal Control

Description:: Directed energy deposition (DED) has pushed the frontiers of manufacturability by enabling the creation of multi-material, functionally graded components, the repair or modification of existing components, and the addition of wear resistant coatings. This additive manufacturing method creates a 3D object by depositing powder directly into a small molten pool...
Keyword:: Directed Energy Deposition, Thermal Control, and Additive Manufacturing
Subject:: Mechanical engineering
Creator:: Bennett, Jennifer Lynn
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 06/28/2021
Date Created:: 2021-01-01
Resource Type:: Dissertation
Alternate Identifier:: etdadmin_upload_814209 and http://dissertations.umi.com/northwestern:15520

Deconvolution of Nanomechanical Atomic Force Microscopy across Interfaces in Polymer Systems in Experiment and Simulation

Description:: High performance polymers and their composites have wide ranging application in advanced and emerging material systems. The macroscale performance of these advanced materials is often defined by interfaces that induce nanoscale changes in the microstructure or molecular conformations (termed the ‘interphase’) of the polymer. Atomic force microscopy (AFM) is an...
Keyword:: Indentation, Nanoconfinement, Polymers, Atomic Force Microscopy, Nanocomposites, and Additive Manufacturing
Subject:: Nanotechnology, Materials Science, and Mechanical engineering
Creator:: Collinson, David William
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 02/01/2021
Date Created:: 2020-01-01
Resource Type:: Dissertation
Alternate Identifier:: http://dissertations.umi.com/northwestern:15360 and etdadmin_upload_775260

Development and Optimization of High-resolution Additive Manufacturing towards Implantable Biomedical Devices

Description:: In recent years Additive Manufacturing (also known as 3D printing) processes have risen in use within research and industry to create complex, custom parts, which would be otherwise too expensive or even impossible to fabricate via conventional manufacturing methods. While originated as a tool for rapid prototyping, the improvements in...
Keyword:: Scaffolds, Fabrication Accuracy, Biomedical, and Additive Manufacturing
Subject:: Mechanical engineering
Creator:: Ware, Henry Oliver Tenadooah
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 01/21/2021
Date Created:: 2020-01-01
Resource Type:: Dissertation
Alternate Identifier:: http://dissertations.umi.com/northwestern:15077 and etdadmin_upload_741389

Unconventional Approaches to High Throughput Nanolithography and 3D Printing

Description:: This thesis centers around the development and application of novel high throughput lithography tools. These advances help: 1) establish the field of nanocombinatorics, where massive libraries (termed megalibraries) of materials can be prepared in a positionally encoded manner and then screened for functional activity, and 2) advance stereolithographic 3D printing...
Keyword:: Scanning Probe, Nanolithography, 3D Printing, Lithography, Combinatorial Libraries, and Additive Manufacturing
Subject:: Nanotechnology, Materials Science, and Chemical engineering
Creator:: Hedrick, James Lupton
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 02/12/2020
Date Created:: 2019-01-01
Resource Type:: Dissertation
Alternate Identifier:: etdadmin_upload_662564 and http://dissertations.umi.com/northwestern:14647

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Toward a Digital Twin of Metal Additive Manufacturing: Process Optimization and Control Enabled by Physics-based and Data-driven Models

Establishing Process-Structure Relationships in Laser Powder Blown Directed Energy Deposition Through In-situ Investigation

Addressing Speed-accuracy Trade-off in Additive Manufacturing for Optical Systems

Physics-Informed Data-Driven Prediction and Design in Advanced Manufacturing Processes

Multi-scale Modeling of the Laser Powder-bed Fusion Additive Manufacturing Process

Tailored Mechanical and Geometric Properties in Directed Energy Deposition via Global Thermal Control

Deconvolution of Nanomechanical Atomic Force Microscopy across Interfaces in Polymer Systems in Experiment and Simulation

Development and Optimization of High-resolution Additive Manufacturing towards Implantable Biomedical Devices

Unconventional Approaches to High Throughput Nanolithography and 3D Printing

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