Ultrasonic Nondestructive Evaluation Of Metal Additive Manufacturing.,
2018
University of Louisville
Ultrasonic Nondestructive Evaluation Of Metal Additive Manufacturing., Venkata Karthik Nadimpalli
Electronic Theses and Dissertations
Metal Additive Manufacturing (AM) is increasingly being used to make functional components. One of the barriers for AM components to become mainstream is the difficulty to certify them. AM components can have widely different properties based on process parameters. Improving an AM processes requires an understanding of process-structure-property correlations, which can be gathered in-situ and post-process through nondestructive and destructive methods. In this study, two metal AM processes were studied, the first is Ultrasonic Additive Manufacturing (UAM) and the second is Laser Powder Bed Fusion (L-PBF). The typical problems with UAM components are inter-layer and inter-track defects. To improve the …
Phase Field Model Of Thermally Induced Phase Separation (Tips) For The Formation Of Porous Polymer Membranes,
2018
University of Arkansas, Fayetteville
Phase Field Model Of Thermally Induced Phase Separation (Tips) For The Formation Of Porous Polymer Membranes, Ashley Green, Aria Green
Mechanical Engineering Undergraduate Honors Theses
Most membrane research and development has been done through experimental work, which can be costly and time consuming. An accurate computational model would greatly reduce the need for these experiments. The focus of the research presented in this paper is to create an accurate computational model for membrane formation using thermally induced phase separation (TIPS). A phase field model is employed to create this model including the Cahn Hilliard Equation and Flory Huggins Theory. This model produced computational results that correspond well with theoretical and experimental results. The model was then adapted to correspond to the PVDF/DPC polymer-solvent system by …
Influence Of Impact Conditions On Feedstock Deposition Behavior Of Cold-Sprayed Fe-Based Metallic Glass,
2018
Bucknell University
Influence Of Impact Conditions On Feedstock Deposition Behavior Of Cold-Sprayed Fe-Based Metallic Glass, Constance Ziemian, Wendelin Wright, David E. Cipoletti
Faculty Journal Articles
Cold spray is a promising method by which to deposit dense Fe-based metallic glass coatings on conventional metal substrates. Relatively low process temperatures offer the potential to prevent the crystallization of amorphous feedstock powders while still providing adequate particle softening for bonding and coating formation. In this study, Fe48 Mo14 Cr15 Y2 C15 B6 powder was sprayed onto a mild steel substrate, using a variety of process conditions, to investigate the feasibility of forming well-bonded amorphous Fe-based coatings. Particle splat adhesion was examined relative to impact conditions, and the limiting values of temperature and velocity associated with successful softening and …
Design And Implementation Of A Virtual Reality Laboratory For Mechanical Maintenance,
2018
Morehead State University
Design And Implementation Of A Virtual Reality Laboratory For Mechanical Maintenance, Adolfo Enrique Samudio Cano
Morehead State Theses and Dissertations
A thesis presented to the faculty of the College of the College of Business and Technology at Morehead State University in partial fulfillment of the requirements for the Degree Master of Science by Adolfo Enrique Samudio Cano on April 27, 2018.
Novelis Teaching Table,
2018
Kennesaw State University
Novelis Teaching Table, Phillip Laplante, Robert Hemker, Taylor Mcgriff, Juan Restrepo, Shelly Abraham
KSU Journey Honors College Capstones and Theses
Novelis is a company that specializes in metal casting, recycling, and rolling. They primarily focus on aluminum rolling for cans and car bodies but are an industry leader in numerous related areas. As the rolling process is not taught in most general engineering courses, Novelis periodically teaches new engineers and technicians about the specifics of this relatively mathematically complex process. Most of the current teaching methods are through PowerPoint presentations and group exercises, with minimal hands-on involvement. One of the most useful tools for teaching the rolling process is an actual jeweler’s rolling mill, which Novelis currently possesses, but is …
Modeling Residual Stress Development In Hybrid Processing By Additive Manufacturing And Laser Shock Peening,
2018
University of Nebraska-Lincoln
Modeling Residual Stress Development In Hybrid Processing By Additive Manufacturing And Laser Shock Peening, Guru Charan Reddy Madireddy
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
The term “hybrid” has been widely applied to many areas of manufacturing. Naturally, that term has found a home in additive manufacturing as well. Hybrid additive manufacturing or hybrid-AM has been used to describe multi-material printing, combined machines (e.g., deposition printing and milling machine center), and combined processes (e.g., printing and interlayer laser re-melting). The capabilities afforded by hybrid-AM are rewriting the design rules for materials and adding a new dimension in the design for additive manufacturing paradigm. This work focuses on hybrid-AM processes, which are defined as the use of additive manufacturing (AM) with one …
Effect Of Shot Peening On Stress Corrosion Behavior Of Biodegradable Magnesium We43,
2018
University of Nebraska-Lincoln
Effect Of Shot Peening On Stress Corrosion Behavior Of Biodegradable Magnesium We43, Tejaswita Patil
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
Conventionally used metals for orthopedic devices made of titanium, stainless steel, and Co-Cr alloys are designed to be permanently implanted. However, long-term complications arise and a secondary implant removal surgery is often necessary. A mismatch in stiffness between the bone and implant results in stress shielding that negatively affects bone density. To overcome these problems, magnesium alloys (e.g., WE34) are favored due to a lower Young’s modulus (45 GPa) and biodegradability. The critical technical barrier with magnesium alloys is their high corrosion rate in physiological (salt-based) environments. One solution is to use surface treatments, such as shot peening (SP), to …
Reducing Stress In 3d Printed Parts Made With Laser Engineered Net Shaping,
2018
University of New Mexico
Reducing Stress In 3d Printed Parts Made With Laser Engineered Net Shaping, Shaun Ross Whetten
Mechanical Engineering ETDs
Thermal cycling and repeated melting/solidification cycles characteristic of 3D metal printing processes causes buildup of residual stress in 3D printed parts. Using laser engineered net shaping (LENS®), residual stresses are formed leading to deformation and possible cracking of the 3D printed metal components. The LENS process offers opportunities for rapid prototyping, alternative manufacturing processes, and repair of worn/broken components so it is important to be able to minimize the effects of residual stress. Work was performed to understand the benefit of substrate heating on reducing residual stress in metal parts made using the LENS process. Substrate deformation, and destructive methods …
Developing Nanopore Electromechanical Sensors With Transverse Electrodes For The Study Of Nanoparticles/Biomolecules,
2018
Louisiana State University and Agricultural and Mechanical College
Developing Nanopore Electromechanical Sensors With Transverse Electrodes For The Study Of Nanoparticles/Biomolecules, Mohammadsadegh Beheshti
LSU Doctoral Dissertations
This study concerns development of a technology of utilizing metallic nanowires for a sensing element in nanofluidic single molecular (nanoparticle) sensors formed in plastic substrates to detect the translocation of single molecules through the nanochannel. We aimed to develop nanofluidic single molecular sensors in plastic substrates due to their scalability towards high through and low cost manufacturing for point-of-care applications. Despite significant research efforts recently on the technologies and applications of nanowires, using individual nanowires as electric sensing element in nanofluidic bioanalytic devices has not been realized yet. This dissertation work tackles several technical challenges involved in this development, which …
Manufacturing Process Simulation – On Its Way To Industrial Application,
2018
University of Applied Sciences Augsburg
Manufacturing Process Simulation – On Its Way To Industrial Application, Dennis Otten, Tobias A. Weber, Jan-Christoph Arent
International Journal of Aviation, Aeronautics, and Aerospace
Manufacturing process simulation (MPS) has become more and more important for aviation and the automobile industry. A highly competitive market requires the use of high performance metals and composite materials in combination with reduced manufacturing cost and time as well as a minimization of the time to market for a new product. However, the use of such materials is expensive and requires sophisticated manufacturing processes. An experience based process and tooling design followed by a lengthy trial-and-error optimization is just not contemporary anymore. Instead, a tooling design process aided by simulation is used more often. This paper provides an overview …
Sensel Morph: Product Communication Improvement Initiative,
2018
California Polytechnic State University, San Luis Obispo
Sensel Morph: Product Communication Improvement Initiative, Kasper W. Lui-Delange, Samuel Distler, Rafael Paroli
Industrial and Manufacturing Engineering
Sensel is a startup company that recently launched their first product. The Morph is a multi-functional touch interface that interacts with a wide range of software through touching enabled silicon overlays. The support documentation was believed to cause confusion, which is leading to limited sales and increased returns. We focused on the structures of its website and product documentation, which were initially developed without end user testing. Our team explored Sensel’s current state to develop two multiphase design alternatives. These designs provide multiple user-facing testing frameworks as well as determine the root-cause of the Morph’s current communication issues. The designs …
Improving Warehouse Capacity For Synergy Manufacturing,
2018
California Polytechnic State University, San Luis Obispo
Improving Warehouse Capacity For Synergy Manufacturing, Brian Garcia
Industrial and Manufacturing Engineering
This report aims to aid Synergy Manufacturing (a well-recognized producer of high-performance components for off-roading vehicles) to improve in-house production capacity in wake of an expanded facility space and substantial increase in the number of current available products over the span of a few years. Current warehouse issues include struggling to meet demand, high inventory, and an unsafe overcrowding of WIP on the floor space. The steps taken to resolve these issues are to collect setup times, operational times, total process times, machine tool usage, and flow process from a selected group of five high-demand items from Synergy Manufacturing’s current …
Building A Database For A Startup: Boltabout,
2018
California Polytechnic State University, San Luis Obispo
Building A Database For A Startup: Boltabout, Danielle Tran
Industrial and Manufacturing Engineering
BoltAbout is a young start-up based out of San Luis Obispo, CA. Their primary business is renting out bikes via monthly-subscription with the opportunity to lease to own. BoltAbout has seen great success over the past 2 years and is looking to expand. The company currently has 200 bikes, but the demand is far outweighing the supply. The CEO of BoltAbout hopes to grow to grow the company’s inventory to 500 bikes by the end of 2017 and 1500 by the end of the school year. As the company continues to expand, it will need to be able to accurately …
Crystal Engineering Manufacturing Facility Analysis,
2018
California Polytechnic State University, San Luis Obispo
Crystal Engineering Manufacturing Facility Analysis, Maximiliano Cortes, Eric Dustin Kornrumpf, Sthefano Alvarado
Industrial and Manufacturing Engineering
This report will encompass a two-quarter long senior project effort to provide a recommendation for the client, Crystal Engineering. Crystal Engineering is currently in the process of introducing three new products, one now and two within the next six months. However, their existing lines already occupy the available production space and as a result, they are unable to determine how to effectively incorporate new production lines within the facility. Therefore, the main objectives of this project were to deliver several facility redesign layouts backed by a holistic justification for each. The formulation of the facility redesign layouts incorporated several industrial …
Cal Poly Rose Float Overheight Mechanism,
2018
California Polytechnic State University, San Luis Obispo
Cal Poly Rose Float Overheight Mechanism, Ali A. Harake, Breanna H. Tran, Morgan K. Montalvo, Sergio B. Gutierrez
Mechanical Engineering
The Cal Poly Universities jointly build and enter a floral entry, commonly known as a float, into the Pasadena Tournament of Roses Rose Parade. At the end of this parade route, there is a 16’6” bridge all floats must drive under. The scope of our project is to design and build a mechanism roughly described as an “overheight” mechanism, as its function is to raise and lower large heavy structures so the float is able to pass under the bridge. This hydraulic mechanism is powered via the float animation system.
Manufacturing Of A Carbon Fiber Part With Complex Geometry,
2018
California Polytechnic State University, San Luis Obispo
Manufacturing Of A Carbon Fiber Part With Complex Geometry, Caitlyn Pellemeier, Eric Rodan, Alex King, Nicolas Carlucci
Mechanical Engineering
The purpose of this study is to determine the best method for manufacturing a part with precision tolerances and a small deflection requirement. The desired tolerances include a flatness of 0.002in, parallelism of 0.005in, heat tolerance of 60℃, and a max deflection at the loaded end of the part of 0.28mm. To accomplish this, our team uses carbon fiber as the part material because compared to traditional metals it is stiffer and lighter. Carbon fiber molding processes are explored and narrowed down to Liquid Composite Molding (LCM) and Resin Transfer Molding (RTM). These processes use dry fiber combined with epoxy …
Student Shop Access And Inventory Control In The College Of Architecture And Environmental Design Shops,
2018
California Polytechnic State University, San Luis Obispo
Student Shop Access And Inventory Control In The College Of Architecture And Environmental Design Shops, Ryan Raj Mattel, Chris Steven Chen, Kevin Michael Gallagher
Industrial and Manufacturing Engineering
The Cal Poly College of Architecture and Environmental Design shops, directed by David Kempken, give the opportunity for thousands of students to use the “Learn By Doing” philosophy and operate various machinery, tooling, and devices to complete projects inside and outside of the classroom. These students are able to check out tools and machinery to complete these projects on a weekly basis. This report will discuss the complexities and shortcomings of the current database system, FileMaker Pro, that is used for these transactions. The report will furthermore discuss the design and methodology of replacing this system with an improved integrated …
Reducing Same Day Missed Appointments,
2018
California Polytechnic State University, San Luis Obispo
Reducing Same Day Missed Appointments, Lucas Madison, Tyler Moore, Jolani Chun-Moy
Industrial and Manufacturing Engineering
Radiology Associates (RA) is a diagnostic imaging center that offers high-quality, digital medical imaging and interventional radiology services for patients, physicians and healthcare organizations across the Central Coast. They are an ongoing problem that involves a considerable portion of their patients not showing up for their appointments Our project aims to reduce same day missed appointments at Radiology Associates. Radiology Associates currently has a no-show rate of 13.48%. They lose approximately $240 for every same day missed appointment. Our goal was to find new ways to reduce their no-show rate to 8%. Based on our calculations, Radiology Associates could save …
Toward A Production Ready Fbj Process For Joining Dissimilar Combinations Of Gadp 1180 Steel And Aa 7085-T76,
2018
Brigham Young University
Toward A Production Ready Fbj Process For Joining Dissimilar Combinations Of Gadp 1180 Steel And Aa 7085-T76, Kevin Alexander Shirley
Theses and Dissertations
Friction Bit Joining (FBJ) is a new technology that can be used to join dissimilar materials together. This ability makes it a good candidate for creating light weight structures for the automotive industry by combining lightweight materials such as aluminum to stronger materials like advanced high-strength steels. The automotive industry and many other industries have great interest in reducing structure weight to increase fuel efficiency. The purpose of this research is to make FBJ of GADP 1180 to AA 7085-T76 a production ready process by (1) better understanding the effects of process parameters, bit design and tool design on joint …
Manufacture Of Complex Geometry Component For Advanced Material Stiffness,
2018
California Polytechnic State University, San Luis Obispo
Manufacture Of Complex Geometry Component For Advanced Material Stiffness, David Russell Bydalek
Master's Theses
The manufacture, laminate design, and modeling of a part with complex geometry are explored. The ultimate goal of the research is to produce a model that accurately predicts part stiffness. This is validated with experimental results of composite parts, which refine material properties for use in a final prototype part model. The secondary goal of this project is to explore manufacturing methods for improved manufacturability of the complex part. The manufacturing portion of the thesis and feedback into material model has incorporated a senior project team to perform research on manufacturing and create composite part to be used for experimental …
