Digital Commons Network^™

Modeling, Simulation, And Validation Of Process-Structure-Property Relationships In Fused Filament Fabrication, Aaron Grant

Electronic Theses and Dissertations

As additive manufacturing (AM) grows in popularity, the need for better simulation tools to predict the process-structure-property relationships of AM parts becomes ever more necessary to employ the technology in design of functional parts with varying degrees of complexity and performance requirements. Many simulation tools and techniques have been developed that aim to achieve this goal, and the main purpose of this research is to explore how well different simulation tools and modeling approaches can capture various AM-specific features such as inter-raster and end-of raster voids, and residual stresses induced by dissimilar rates of thermal expansion. Process simulation of fused …

Ethical Dilemmas Surrounding Manufacturing Offshoring: Assessing The Morality Of Offshoring Decisions Through A Utilitarian Viewpoint, Luis Encinas

Honors Scholar Theses

The purpose of this paper to assess the ethical dilemmas that exist when American companies offshore manufacturing work to cheaper labor markets abroad through a utilitarian perspective. The paper will explain what offshoring is and what has driven American companies into engaging in this practice. Next, the criteria for the utilitarian assessment will be explained. After, I will examine the effects on the U.S labor force, U.S economy, and the foreign labor force through two case studies: the Bangladeshi apparel industry and the Mexican maquiladoras industry. Finally, the paper will offer some suggestions for making this practice more ethical in …

Consumers Support A Slowing Economy, Eric Thompson

Business in Nebraska

Nebraska will record moderate economic growth during the forecast period but will lag U.S. growth. Like the national economy, growth Nebraska’s goods producing sector will struggle. Farm incomes will be flat from 2020 to 2022 after improving this year. Manufacturing employment also is expected to drop. However, most other sectors will expand, including services, finance and construction. Projected growth rates for 2020 to 2022 are presented in Table 1.

Employment will grow by 0.6% to 0.8% per year, below the national rate. Non-farm income will grow between 3.7% and 3.8% each year. This growth readily exceeds inflation and population growth, …

A Systematic Approach For Waste Management In The Semiconductor Industry, Vivian Hui

Theses and Dissertations

One area that has received attention in the literature is sustainable production. This research has focused upon modifying production processes to improve sustainability. Semiconductor manufacturing has evolved into one of the most important industries in the world. However, as a new industry, semiconductor manufacturing has had far less attention in the sustainability literature as compared to more mature industries. Amongst the sustainability frameworks and methodologies that have been developed to measure the sustainability of an entity, waste is treated as an afterthought, not as the focus of the research. The literature rarely considers waste management as a component of sustainable …

Axial Compressor Based On Plastic Additive Manufacturing, Chris Phu

Mechanical Engineering Undergraduate Honors Theses

Turbomolecular pumps designed to function in very low pressures tend to be too prohibitively expensive for student researchers. On the other hand, while conventional pumps are affordable, they can’t function in extreme low pressures. An additively manufactured axial compressor however is inexpensive to manufacturer and only needs to be build up enough pressure for a conventional pump to function. After many design iterations, a final iteration that is near vacuum chamber ready has been 3D printed and tested for spin functionally. The designed axial compressor is easy to assemble and very modular. Conclusions from each of the design iterations is …

Durability Of Hybrid Large Area Additive Tooling For Vacuum Infusion Of Composites, Nathan Joseph Northrup

Theses and Dissertations

The purpose of this research was to scientifically validate potential cost-saving measures for production of large area additively manufactured tooling for vacuum infusion of composites. These cost saving measures included using a hybrid additive/subtractive manufacturing system to fabricate the mold, requiring lower capital cost and creating shorter lead times. Fiberglass reinforcement was used instead of carbon in the mold material. The validation was done by designing and fabricating a mold for a custom test artifact and analyzing the surface geometry over the course of multiple infusions until tool failure.After printing and machining, the mold required a sealer in order to …

Application Of Solar Water Heaters For Industrial Use, Lucas T. Atkins

Theses and Dissertations

Solar water heating is a technology that is mainly used for domestic water heating in residential homes. In most applications, the idea is to make a home “off the grid” in that there is no requirement for outside infrastructure or need for energy utility to provide power to this home. This falls in line with the trend of “going green” in an effort to reduce energy use, increase efficiency, or reduce emissions and other harmful byproducts.

This technology can be adapted to reduce the energy costs of industrial manufacturing plants. By eliminating the need for certain sections of a process …

Fiberglass Mat-Roll Carryover, Bryce Youngson, Aaliyah Ramos, Johann Cayaban, Tony Ledesma

Mechanical Engineering

The asphalt shingle is a type of roof shingle that uses asphalt for waterproofing. Its low cost and easy installation make it one of the most common roof covers in North America. General Aniline and Film (GAF) is one of the nation’s largest manufacturers of roofing materials and produces asphalt shingles at their Shafter, California manufacturing facility. To manufacture asphalt shingles, a base material of fiberglass passes through a series of processes that sequentially add asphalt, ceramic-coated mineral granules, and thermoplastic adhesive. The fiberglass base-material arrives at the manufacturing facility in large rolls that workers must periodically splice together in …

Application Of Critical Chain Project Management To The Production Part Approval Process, David Podolak

Masters Theses & Specialist Projects

Daicel Safety Systems Americas, INC has traditionally utilized various methods to manage project completions including the Critical Path Method (CPM). Though these methods have led to successful project completions, they often come with adverse effects. Due to the amount of literature and advancement in the project management discipline, alternative options such as Critical Chain Project Management (CCPM) have gained popularity. CCPM seeks to perfect the CPM approach by recognizing resource constraints and the critical chains dependency on them while safeguarding completion dates with buffers. CCPM offers project managers an option to remove resource inefficiency and stalling while meeting deadlines.

The …

Understanding The Connection Of Performance And Z-Scores For Manufacturing Firms In South Korea, S.L. Foo, Shaakalya Pathak

Research Collection School Of Accountancy

South Korea is a key leading economy in the Asia Pacific region. This study examines the relationship between the financial health, as measured by the Altman Z-Score, and corporate performance, as measured by the Return on Equity (ROE), of listed manufacturing companies in this market. A linear regression has been conducted between these variables to determine the magnitude and direction of their relationships. The trends of Z-Scores over a five-year period have also been analysed. The analysis covers the period from 2013 to 2017 (inclusive) and yields a statistically positive correlation between ROE and the Z-Score for the market. South …

Automation And Jobs: When Technology Boosts Employment, James Bessen

Faculty Scholarship

Will new technologies cause industries to shed jobs, requiring novel policies to address mass unemployment? Sometimes productivity-enhancing technology increases industry employment instead. In manufacturing, jobs grew along with productivity for a century or more; only later did productivity gains bring declining employment. What changed? The elasticity of demand. Using data over two centuries for US textile, steel and auto industries, this paper shows that automation initially spurred job growth because demand was highly elastic. But demand later became satiated, leading to job losses. A simple model explains why this pattern might be common, suggesting that today's technologies may cause some …

Obama Keeps Fueling The Myth Of Manuafacturing, Nathan B. Oman

Nathan B. Oman

No abstract provided.

An Examination Of Corporate Performance And Altman Z-Scores Of Indian Manufacturing Firms, See Liang Foo, Shaakalya Pathak

Research Collection School Of Accountancy

India is a key leading economy in the Asia Pacific region. This study examines the relationship between the financial health, as measured by the Altman Z-Score, and corporate performance, as measured by the Return on Equity (ROE), of listed manufacturing companies in this market. A linear regression has been conducted between these variables to determine the magnitude and direction of their relationships. The trends of Z-Scores over a five-year period have also been analysed. The analysis covers the period from 2013 to 2017 (inclusive) and yields a statistically positive correlation between ROE and the Z-Score for the market. India registered …

Runaway: A History Of Postwar New York In Four Factories, Andy Battle

Dissertations, Theses, and Capstone Projects

At midcentury, New York City was among the preeminent manufacturing centers in the United States. Within a generation, this manufacturing economy suffered an extraordinary collapse. Beginning in the 1950s, workers and their unions began to use the term “runaway” to describe factories that pulled up stakes in New York and set them back down in other climes. This dissertation explores the deindustrialization of New York City through case studies of “runaway” plants, or factories that left New York for the American South or abroad between the years 1945 and 1975.

In general, the manufacturers that remained in New York at …

Planning For Industrial Land And Industrial Jobs: An Evaluation Of New York City's Industrial Business Zone Program, Jennifer Davis

Masters Theses

In recent years, industrial preservation policies, which aim to preserve urban industrial activity and industrial employment often through the preservation of industrial land, have emerged as a flashpoint in cities across the country that have implemented these policies. While critics contend that industrial preservation policies amount to smokestack chasing in “post-industrial” cities like New York City, industrial preservationists argue that such policies help to preserve well-paying, middle-class jobs and thus represent a tool to mitigate rising income inequalities in cities. Despite considerable attention to these policies, minimal research has evaluated the effectiveness of industrial preservation policies as land use and …

Maquiladoras In Central America: An Analysis Of Workforce Schedule, Productivity And Fatigue., Jose L. Barahona

Masters Theses & Specialist Projects

Textile factories or Maquiladoras are very abundant and predominant in Central American economies. However, they all do not have the same standardized work schedule or routines. Most of the Maquiladoras only follow schedules and regulations established by the current labor laws without taking into consideration many variables within their organization that could affect their overall performance. As a result, the purpose of the study is to analyze the current working structure of a textile Maquiladora and determine the most suitable schedule that will abide with the current working structure but also increase production levels, employee morale and decrease employee fatigue. …

Development Of An Automated Fiber Placement Process For The Fabrication Of Thermoplastic Composite Laminates, Anthony M. Sabido

Theses and Dissertations

An automated fiber placement process is desired for manufacturing variable-stiffness thermoplastic composite laminates. By developing such a composite laminate, it is possible to take advantage of the tunable performance increases that are achievable by spatially steering individual tows. In addition, using a thermoplastic polymer as the matrix material has many advantages: a high toughness, ability to employ thermoplastic joining processes that do not require adhesives, long storage life, and lacks the need to be refrigerated. This process was experimentally developed, where the effect of various process parameters on the quality of the laminate were evaluated. An experimental AFP head was …

Manufacturing Process Implications On Aerosolized Submicron To Nano-Sized Particles From Respiratory Drug Delivery Devices, Mohammed Ali

Faculty Posters

No abstract provided.

Fluid Power Vehicle Challenge - The Incompressibles - Final Design Report, Nicholas Gholdoian, Russell Posin, David Vitt, Alex Knickerbocker, Kyle Franck, Julian Rodkiewicz

Mechanical Engineering

This report provides a comprehensive description of the research, analysis and design work that The Incompressibles have completed thus far in the senior project process. This document includes all the work that The Incompressibles have completed for the team’s Preliminary Design Review (PDR), Critical Design Review (CDR), the work leading up to the 2019 FPVC competiton and the competition results. This report includes the initial research that the team completed for the fluid power competition, first iterations of designs, final iterations of designs, manufacturing results and processes, and finally testing and results from competition. With a new design for the …

Manufacturing Efficiency Improvements On High Variation Lines, Molly J. Schultz

Honors Capstones

Motorola Solutions Inc. is a manufacturer of high quality telecommunications equipment. Their newer facility in Elgin, IL builds and assembles portable and mobile radios. Given the high variation in product mix and demand, management teams and line leads struggle to allocate the right number of workers to maximize efficiency. By creating a current state discrete event simulation model using Arena Simulation, important performance metrics were captured such as line efficiency, worker utilization, product wait times, etc. The goal is to use these performance outputs to develop an excel tool that Motorola can utilize for employee allocation.

Relationship Between The Effectiveness Of Internal Control And Financial Performance Of Manufacturing Companies In The United States: 2013-2017, Gregorius A. Pradana

Honors Capstones

This study aimed to test the relationship between the companies’ financial performances and their effectiveness of internal control (IC) or the compliance to Sarbanes-Oxley Act (SOX) Section 404 in the manufacturing industry in the United States (US) capital market. This study uses secondary data obtained from Wharton Research Data Services (WRDS) of University of Pennsylvania and EDGAR Securities and Exchange Commission database. The secondary data used from the sources are from 2013 to 2017. The data from those years were used to see the relationship between the companies’ effectiveness IC during that period and their financial performances. The result of …

Shootings And Their Effect On Stock Price And Volume In The Firearm Manufacturing Industry, Conor O'Donnell

Honors Scholar Theses

This article investigates how mass shootings are influencing the price and trading volume of firearm manufacturers differently than the previously documented “fear-based” gun sales price spikes. (Wallace, 2015). It is expected that, following a mass shooting, firearms sales increase due to a fear of legislation banning products and a limited timeframe to obtain them. For instance, The Financial Times of London reported 52% increase of gun sales in the year following the Sandy Hook shooting; however, in the long term, if there is regulation that limits the autonomy of manufacturers then investors would be inclined to divest in firearms manufacturers. …

Designing For Sustainable Bicycle Manufacturing, Xavier H. Arvelo Rodriguez

Theses

Currently, with the increase of people moving from one place to another, either to fulfill their daily activities or for recreation, the need has been created to produce a greater amount of means of transportation that can facilitate this action. Many people choose to use vehicles that do not help with the reduction of environmental pollution; among these, we can mention cars, buses, motorcycles, etc. The use of bicycles is predominant in countries with a developed culture and infrastructure focused on bike riding. Also, where fuel taxes are higher and people care about pollution in their surroundings.

In this project, …

High Strollers, Braeden Hammond, Morley Perrin, Reid Bartels, Juan Rodriguez

Mechanical Engineering

This report documents the final product of Jonathon’s new lightweight stroller. The Mechanical Engineering team from Cal Poly, High Strollers, began the project to create a lightweight stroller for the project sponsor, Nina Aguayo, and her son, Jonathon Aguayo, in Fall of 2018. Jonathon is diagnosed with Delayed Brain Development and Hypotonia with some characteristics of Cerebral Palsy. He has a 50lb high intensity stroller to go to and from school. Mrs. Aguayo needed a stroller that is easier to transport while still meeting all of Jonathon’s needs. The re-designed stroller will make leisurely outings for Mrs. Aguayo and Jonathon …

Universal Bike Suspension Design, Ernesto Huerta, Gregory Ryan Ritter, Chris Michael Fedor, Michael Wu

Mechanical Engineering

Cal Poly Bike Builders (CPBB) is a student club at Cal Poly helping students design and fabricate their own bicycles. Currently, club members build rigid frames and mountain bikes with only front-suspension–commonly referred to as a “hardtail”. As more students join the club, interest grows in building full-suspension mountain bikes (FSMTB). Designing and manufacturing a mountain bike rear-suspension system requires a diverse skillset and a substantial time commitment. As a result, individual efforts building FSMTB have proven unsuccessful. The scope of this project is to develop a defined method and necessary tools such that all CPBB members can efficiently build …

Improving The Accuracy Of A Finite Element Based Manufacturing Simulation: A Case Study Of Laser-Induced Bending In A Thin Metal Sheet, Joseph Johanson

Master's Theses

Finite element analysis (FEA) has become an increasingly popular tool used by researchers and professionals for comparing experimental data to theoretically expected values. Its use can prove to be an invaluable resource when analyzing or designing a system by giving the user the ability to understand the process being modeled at a much deeper level. However, finite element analysis it is still prone to generating inaccurate results if not used properly. When simulating certain physical processes, such as those found during manufacturing, the obtained results are sometimes prone to error when compared with their experimentally obtained counterparts.

The present work …

Increasing Operator Skills In A Manufacturing Environment, Bobbie Lee Hubbard

Instructional Design Capstones Collection

A plastic-injection molding facility is converting many machines into more automated systems. These complex systems require higher-level skill sets than current operators have been trained in. There is a need to increase the level of competency in most, if not all, of the operators at the Facility, and create a system of levels that engages employees and encourages learning new skills to increase their position and pay.

There is a need for a clear path of compensation based on skills and actions. The Facility is currently not optimizing or maximizing their current portfolio of machines and resources, leaving an unknown …

An Analysis Of Z-Scores And Performance: Manufacturing Companies In Hong Kong, S.L. Foo, Shaakalya Pathak

Research Collection School Of Accountancy

Hong Kong is a key leading economy in the Asia Pacific region. This study examines the relationship between the financial health, as measured by the Altman Z-Score, and corporate performance, as measured by the Return on Equity (ROE), of listed manufacturing companies in this market. A linear regression has been conducted between these variables to determine the magnitude and direction of their relationships. The trends of Z-Scores over a five-year period have also been analysed. The analysis covers the period from 2013 to 2017 (inclusive) and yields a statistically positive correlation between ROE and the Z-Score for the market. Hong …

A Conceptual And Comparative Analysis Of The Obligations Of Third-Party Certifiers, Jan De Bruyne

Ohio Northern University Law Review

No abstract provided.

A Systematic Study On The Effects Of Dimensional And Materials Tolerances On Permanent Magnet Synchronous Machines Based On The Ieee Std 1812, Narges Taran, Vandana Rallabandi, Dan M. Ionel, Ping Zhou, Mark Theile, Greg Heins

Power and Energy Institute of Kentucky Faculty Publications

In the process of designing and manufacturing an electrical machine, a systematic study of dimensional and material tolerances is of the utmost importance. This paper proposes a systematic method by which the effect of design specification variations on permanent magnet (PM) synchronous machine performance may be identified and quantified. The method combines design of experiments techniques, open-circuit and short-circuit physical measurements, and virtual test simulations conducted based on the recently approved IEEE Std 1812 testing guide. Three case studies, two provided by a spoke-type PM radial field machine configuration, in two designs with different electromagnetic loading, and an axial flux …