In-Situ X-Ray Imaging Of The Selective Laser Melting Process, 2020 Missouri University of Science and Technology
In-Situ X-Ray Imaging Of The Selective Laser Melting Process, Meelap M. Coday
Masters Theses
"Fusion-based metal additive manufacturing (AM) has garnered much interest in recent decades. Despite the popularity of fusion-based AM technologies such as selective laser melting (SLM), there are still fundamental questions and uncertainties that need to be addressed. In this work, we focus on the understanding of the undercooling in the SLM process and the uncertainties induced by the laser beam size, power, and scan speed. First, we report the estimation of undercooling in the SLM process from the solidification rate measured by in-situ high-speed synchrotron x-ray imaging, based on the dendrite growth velocity model. The undercooling changes as a function …
Influence Of Input Energy On Mechanical Properties Of Laser Powder Bed Fused Aisi 304l Stainless Steel, 2020 Missouri University of Science and Technology
Influence Of Input Energy On Mechanical Properties Of Laser Powder Bed Fused Aisi 304l Stainless Steel, Tan Pan
Masters Theses
“Powder Bed Fusion process with selective laser melting technique is popularly adopted in additive manufacturing area on account of its layer by layer manufacturing fashion capable of fabricating components with complex internal and external geometries and structures. However, the process-property map is unique and vital for different materials and AM configurations used for fabrication. The process parameter is identified as a significant factor that heavily influences the properties and performances of the printed materials.
Current work aimed to extend the existing knowledge on Laser Powder Bed Fusion fabricated AISI 304L by accessing the influence of varying energy input on the …
Influence Of Size Effects On Surface Generation During Finish Machining And Surface Integrity In Ti-6al-4v, 2020 University of Kentucky
Influence Of Size Effects On Surface Generation During Finish Machining And Surface Integrity In Ti-6al-4v, Ian S. Brown
Theses and Dissertations--Mechanical Engineering
Finish machining is an essential manufacturing process that is used to enhance the mechanical characteristics of critical components. The deformation that occurs at the tool and workpiece interface in finish machining significantly affects a host of component properties, commonly referred to as “surface integrity” properties. Surface roughness is a machining deformation-affected characteristic that is of high relevance in contemporary manufacturing. However, over recent decades it has been made clear that the material properties of the deformed surface layers are relevant to component performance as well. Predicting the overall surface quality of a machined component is of great relevance to the …
A Review Of Problem Structuring Methods For Consideration In Prognostics And Smart Manufacturing, 2020 Old Dominion University
A Review Of Problem Structuring Methods For Consideration In Prognostics And Smart Manufacturing, Patrick T. Hester, Andrew J. Collins, Barry Ezell, John Horst
Engineering Management & Systems Engineering Faculty Publications
Successful use of prognostics involves the prediction of future system behaviors in an effort to maintain system availability and reduce the cost of maintenance and repairs. Recent work by the National Institute of Standards and Technology indicates that the field of prognostics and health management is vital for remaining competitive in today’s manufacturing environment. While prognostics-based maintenance involves many traditional operations research-centric challenges for successful deployment such as limited availability of information and concerns regarding computational efficiency, the authors argue in this paper that the field of prognostics and health management, still in its embryonic development stage, could benefit greatly …
A Framework For A Successful Additive Repair System, 2020 Missouri University of Science and Technology
A Framework For A Successful Additive Repair System, Todd E. Sparks
Doctoral Dissertations
“The goal of this research is to generate a revolutionary improvement to the usability and usefulness of additive repair technology by integrating a set of tools into a seamless work flow. Insufficient automation in the current repair process is a huge hurdle in achieving cost-effective, reliable repairs. Many opportunities have been missed due to inconsistency, quality issues and lack of robustness and flexibility. The present work addresses deficiencies in preparatory steps such as 2D and 3D geometry processing, parameter estimation, and path planning as well as on-machine execution of the path plan. The bulk of the effort is focused on …
Additive Manufacturing Of Customized Lithium-Ion Batteries: Process Fundamentals And Applications, 2020 Missouri University of Science and Technology
Additive Manufacturing Of Customized Lithium-Ion Batteries: Process Fundamentals And Applications, Xiaowei Yu
Doctoral Dissertations
“In the pasting decades, considerable efforts have been spent in developing the next-generation lithium-ion batteries (LIBs), from advanced active materials to new manufacturing methods. The development of additive manufacturing (AM) has brought new opportunities to LIBs. In this work, two AM methods are introduced for fabricating electrodes of LIBs. The first method is aerosol printing, which is a solvent-based wet additive method. Whereas the second method is a solvent-free, dry printing method. The commonly used materials for current collectors and active materials (including cathodes and anodes) of LIBs are aerosol printed and the electrochemical functionalities of the printed materials are …
The Influence Of Cryogenic Machining On Surface Integrity And Functional Performance Of Titanium Alloys For Biomedical And Aerospace Applications, 2020 University of Kentucky
The Influence Of Cryogenic Machining On Surface Integrity And Functional Performance Of Titanium Alloys For Biomedical And Aerospace Applications, Ying Sun
Theses and Dissertations--Mechanical Engineering
The excellent properties of titanium alloys such as high strength, as well as good corrosion and fatigue resistance are desirable for the biomedical and aerospace industry. However, the same properties that make titanium alloys desirable in high-performance applications also make these space-age materials “difficult-to-machine” materials, as the titanium alloys exhibit high cutting temperatures because of their high strength and low thermal conductivity.
Cryogenic machining is a severe plastic deformation (SPD) processes which uses liquid nitrogen as the coolant to take away the heat generated during machining in a relatively short time. Cryogenic machining can significantly reduce the cutting temperatures at …
Influence Of Droplet Velocity, Spacing, And Inter-Arrival Time On Line Formation And Saturation In Binder Jet Additive Manufacturing, 2020 Brigham Young University - Provo
Influence Of Droplet Velocity, Spacing, And Inter-Arrival Time On Line Formation And Saturation In Binder Jet Additive Manufacturing, Trenton Colton, Nathan B. Crane
Faculty Publications
Binder Jetting (BJ) is a low-cost Additive Manufacturing (AM) process that uses inkjet technology to selectively bind particles in a powder bed. BJ relies on the ability to control, not only the placement of binder on the surface but also its imbibition into the powder bed. This is a complex process in which picoliter-sized droplets impact powder beds at velocities of 1-10 m/s. However, the effects of printing parameters such as droplet velocity, size, spacing, and inter-arrival time on saturation level (fraction of pore space filled with binder) and line formation (merging of droplets to form a line) are unknown. …
Table Top Dome Tester, 2020 The University of Akron
Table Top Dome Tester, Travis Bernard, Sarah Kassinger, Amanda O'Reilly, Scott Salerno
Williams Honors College, Honors Research Projects
The Erichsen Cupping Test was used as a basis to design a dome tester. The intention of a dome tester is to test sheet metal material properties in all directions. This was done by clamping a piece of sheet metal and using a piston and hydraulic press to punch through the material. The force used to punch the material and the height of the deforming material can be gathered and the sheet metal properties can then be calculated. At the end of the project the team was able to successfully design and manufacture a hydraulic dome tester. However, due to …
Ideal Lacrosse Stick, 2020 The University of Akron
Ideal Lacrosse Stick, Josh Beck, Tyler Skoloda, Noah Reed, Stanley Dembosky
Williams Honors College, Honors Research Projects
This project is focused on the design of a new and innovative lacrosse stick. Our main points of focus will be the strength and durability of the head. As well as solving some of the problems that exist in existing equipment. These problems were identified by interviewing experienced players at the college level. Benefits would include a stronger head that is easier to use for a player on the field to do things like pass, catch, shoot, and field ground balls in an optimal manner. Normally players will have to purchase new heads every season as a result of warping …
Zips Electric Racing Suspension Design, 2020 The University of Akron
Zips Electric Racing Suspension Design, Christopher Thompson, Madison Hughes, Erikah Jackson, Anna Signorino
Williams Honors College, Honors Research Projects
As a member of the 2020 Zips Electric Racing Design Team, I will design the suspension subsystem with three other members. Specifically concentrating on the steering and suspension mounting points, we will optimize and improve some components from the previous year's design. Modeling of components will be done in Solidworks and suspension vehicle behavior will be modeled in MATLAB and Optimum Kinematics.
Tabletop Mechanical Tester, 2020 The University of Akron
Tabletop Mechanical Tester, Jamie Dombroski, Brian English, Richard Leffler, Andrew Shirk
Williams Honors College, Honors Research Projects
The need for hands-on and face-to-face experiences in the engineering classroom is very great. The equations, principles, and concepts can all be learned, but without the visual and tactile application, these don’t always sink in or become concrete. A small-scale tensile test machine was designed, sourced, manufactured, and tested for the purpose of being applied in classroom settings to provide this experience to engineering students. Extensive research was performed concerning tensile machines on the market, the essential elements of which are the load cell, grips, crosshead, extensometer, motor, and frame. The raw materials for the frame were purchased and drawings …
Rinse Tank Salinity Automation, 2020 The University of Akron
Rinse Tank Salinity Automation, George Pahoundis
Williams Honors College, Honors Research Projects
Manufacturing processes are often consisted of many different processes and sub-processes. Each of these carries its own level of importance and impact to the overall picture. In this particular sub-process, salt is rinsed from a product via a rinse tank: a tank whose salinity may not exceed a certain level and whose temperature must not fall below a certain level. This setting is a prime opportunity to implement an automated control system to allow these parameters to be met with upmost efficiency. With potential savings in excess of $20,000 per year and an estimated payback period of 8 weeks, the …
Senior Design Proposal For Brakes Subsystem 2019-2020, 2020 University of Akron
Senior Design Proposal For Brakes Subsystem 2019-2020, Jasmine Zogheib, Zachary Demetriades, Devin Seay
Williams Honors College, Honors Research Projects
This report concentrates on efforts to design a new braking system for the Zips Formula Electric Race Team. The improvements to the braking system will be based upon previous years’ official designs along with optimizing for predetermined criteria. The design will be influenced based on design factors of the car such as weight, center of gravity, wheelbase, and integration with other systems of the car.
Rocket Motor Nozzle, 2020 The University of Akron
Rocket Motor Nozzle, Corey Hillegass
Williams Honors College, Honors Research Projects
For this honors research and senior design project, the authors will research, analyze, and manufacture a rocket motor nozzle for the Akronauts rocket design team. This research and design project will improve how the rocket design team will decide and manufacture nozzles going forward. The impact of this improvement allows the rocket design team to take steps toward being self-sustaining by manufacturing student designed parts as opposed to commercially bought parts. This will not only be successful in increasing student impact on future designs, but also provides a technical challenge for the authors and will present as an impressive feat …
Comparision Of Fillet-Welded Base Plate Fatigue Design For Highway Support Structures With Laboratory Research Tests, 2020 The University of Akron
Comparision Of Fillet-Welded Base Plate Fatigue Design For Highway Support Structures With Laboratory Research Tests, William Shea
Williams Honors College, Honors Research Projects
There are many types of vertical structures along highways that serve unique purposes. These structures include traffic signs for directing, warning, or regulating traffic, luminaires for distributing and directing light, traffic signals supporting equipment such as traffic lights, and combination structures including any combination of the aforementioned structures. Highway support structures are typically fabricated from steel or aluminum and are designed to the guidelines and specifications of the AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals. The structures are connected to a foundation by anchor bolts through a welded base plate. Often a cause …
Zips Electric Racing Suspension Design, 2020 The University of Akron
Zips Electric Racing Suspension Design, Madison Hughes, Christopher Thompson, Erikah Jackson, Anna Signorino
Williams Honors College, Honors Research Projects
I am working with three others on the suspension and steering sybsystems for the Zips Electric Racing design team at The University of Akron. We are improving upon last year's design to help create an optimized vehicle. As part of this project, we take part in weekly design reviews and team meetings, model parts in Solidworks, and perform simulations and FEA using MATLAB/SIMULINK, Solidworks, and Optimum Kinematics.
Automated Runout Measurement Tool, 2020 The University of Akron
Automated Runout Measurement Tool, Ethan Tisch
Williams Honors College, Honors Research Projects
A new measurement process and tool is to be developed to improve the existing method for measuring runout on the commutators of brushed DC product.
After an armature is manufactured, the commutator is inspected by placing the completed rotor assembly in one of several non-standard measurement fixtures. An indicator is then positioned on the commutator. A trained operator proceeds to rotate the armature while taking runout and bar-to-bar measurement at various positions along the length of the commutator.
This existing process is slow, costly, and unreliable. For these reasons, there is substantial economic pressure to develop a superior method for …
Design Of Banner Tow Mechanism For Bush Plane, 2020 The University of Akron
Design Of Banner Tow Mechanism For Bush Plane, Kyle Ciarrone, Ivan Martin, Rishabh Gadi, Tyler Brandt
Williams Honors College, Honors Research Projects
The 2019-2020 AIAA DBF objective was to design, build, and test a banner-towing bush plane that carries wooden passengers and luggage. Senior members on the team undertook the creation of the banner tow mechanism subsystem as their senior design project on behalf of the design team due to the challenge of its mechanical design and the aerodynamic considerations regarding its placement and enclosure aboard the aircraft. The competition as well as access to campus resources were canceled due to COVID-19, so full testing and integration of the mechanism was not achieved. However, the engineering design process was experienced from the …
Redesign And Analysis For Landing Gear Components, 2020 The University of Akron
Redesign And Analysis For Landing Gear Components, Daniel Clarke
Williams Honors College, Honors Research Projects
A project for Collins Aerospace, the company I co-op at, where I will redesign several components of a landing gear for a military program. Any structural/stress analysis will also be performed. The goal is to reduce weight while maintaining strength and structural integrity.