Digital Commons Network^™

A Method For Winding Advanced Composites Of Unconventional Shapes Using Continuous And Aligned Fibers, Abraham K. Allen

Theses and Dissertations

Advanced composites are extremely strong, rigid, and light, even when compared with advanced metals. Advanced composites are replacing high-tech metals as the material of choice for aerospace engineering. However, the processes used to manufacture advanced composites generally lose some of the properties of the materials by their process limitations.

One process that keeps the theoretically awesome qualities of the composite materials in tact is filament winding. Filament wound parts are used as rocket shells, bicycle frame tubes, drive shafts, pressure vessels, etc. Filament winding is an automated process and makes reliable parts to close tolerances. If a straight tube were …

The Effectiveness Of Computer-Based Tutorials In Learning Computer-Aided Design Methods For Tool Design Procedures, Andrew Moroni Hall

Theses and Dissertations

Throughout the past twenty-five years the process of designing and manufacturing a product has been revolutionized by the integration of Computer Aided Design (CAD). Although three-dimensional solid modeling, or 3-D CAD offers a better representation of the product in a virtual environment, it can be complicated and difficult to learn. Tutorials have been developed to assist manufacturing tool design student in the learning of 3-D CAD principles as they apply to tool design. This study seeks to test the effectiveness of those tutorials. A BYU tool design class was divided into two groups according to their assigned laboratory time. The …

Design For Uncertainty., Dirk Pons

DRS Biennial Conference Series

The development of engineering systems, whether those systems be products, plant or services, is a complex activity. The systems themselves are becoming more rather than less complex. Partly this arises from the need to optimise multiple system attributes including function, cost, resource usage, and style, among others. Also, most significant engineering projects involve diverse activities (including design, risk assessment, decision making, construction, and ongoing operation), and these invariably require teams of people with different skills. In turn that diversity requires effective management and leadership. Furthermore, the addition of electronic functionality and active control systems adds functionality but also introduces complex …

Sustained Growth In Nebraska, Saeed Ahmad, John Austin, Tom Doering, Ernie Goss, Bruce Johnson, Mike Lundeen, Donis Petersan, Franz Schwarz, Eric Thompson, Keith K. Turner

Economics Faculty Publications

National Macroeconomic conditions are favorable for future expansion of income, employment, and revenue in Nebraska. In particular, the U.S. economy is now in the heart of an expansion expected to persist over the three year forecast period. The principal engine of growth will be a sustained expansion in private sector investment and consumption demand. However, the rate of growth in the national economy likely will be moderate rather than rapid. At least three factors will act to moderate growth. The first is higher energy prices. Rapid growth in global demand is expected to keep prices for oil and natural gas …

Investigation And Improvement Of The Conveyor System At A Bottle Packaging Operation., Dirk Lee Fugate

Electronic Theses and Dissertations

This investigation examines the bottle packaging conveyor system and its impact on the overall efficiency at a bottle packaging plant in Anderson, South Carolina. The purpose of this study is to demonstrate the existing opportunity to reduce bottle unit cost, increase productivity, decrease the risk of work related injuries, and improve line reliability along with employee moral with the conveying system alone.

Data was gathered for this study in three ways: One, bottle packaging line lead operators were required to document the start and stop times of the conveyor system on their respective lines for six weeks. Two, a conveyor …

An Examination Of A Three-Dimensional Automated Firearms Evidence Comparison System, Natalie G. Carpenter

USF Tampa Graduate Theses and Dissertations

This thesis is an examination of a firearm identification system that creates a three-dimensional image of a bullet in order to record the depth and length of striations occurring along the bullet's surface. Ballistics evidence is an area of forensics in great need of further development. The advent of more sophisticated firearms such as semi-automatic and automatic weapons has increased the need for a matching system that connects bullets found at crime scenes with suspect guns. In the past, control bullets matching ones found at the crime scene have been test fired and then examined by a comparison microscope for …

High-Torque Capacity Compliant Centrifugal Clutches, Ryan G. Weight

Theses and Dissertations

This thesis developed high-torque-capacity floating opposing arm clutches that are manufactured with standard economical manufacturing processes, while maintaining critical performance characteristics. Contact engagement speed and torque capacity models were created for the Hoffco-Comet, floating-opposing-arm (FOA), and floating 1 (F1) clutches. Sensitivity analyses were performed to identify key design parameters. A robust compliant FOA clutch was designed by minimizing the tolerance for both contact engagement speed and torque capacity. The robust design insures that the clutch will operate within the prescribed application constraints. Additional modeling showed that using a layered clutch would significantly tighten the contact engagement speed and torque performance …

Three-Dimensional Modeling And Simulation Of Manufacturing Processes For Transmuter Fuel Fabrication, Richard Arthur Silva

UNLV Retrospective Theses & Dissertations

A proposed method of converting long-lived radionuclides contained within spent nuclear fuel into shorter-lived radionuclides is known as transmutation. The feasibility assessment of fuel manufacturing for transmutation is necessary for the overall success of the transmutation project. As part of that assessment, this paper reviews current methodologies for handling spent nuclear fuel and other highly radioactive material. While not exhaustive, the review encompassed facilities within the U.S. Department of Energy, international operations, as well as, work performed collegiately; The manufacturing of fuel for transmutation will certainly utilize automation and robotics. A simplified 3-D model of a fuel handling operation was …

Manufacturing Pennsylvania’S Future: Regional Strategies That Build From Current Strengths And Address Competitive Challenges, Edward W. Hill

All Maxine Goodman Levin School of Urban Affairs Publications

Deloitte Consulting, LLP, Cleveland State University, Jack Russell Associates, Inc. This study documents the role of manufacturing in Pennsylvania and analyzes the forces shaping the future of the industry. (Team PA Foundation, March 2004). Four goals drove the study: 1) Document the past and present importance of manufacturing to the Pennsylvania economy, 2) analyze the forces that will shape the possible futures of manufacturing in the state, 3) assess the economic impact and return on investment of the Industrial Resources Centers, and 4) identify actions to help achieve a dynamic and prosperous future for manufacturing.

An Approach To Automating Data Collection For Simulation, Irin Portnaya

Electronic Theses and Dissertations

In past years many industries have utilized simulation as a means for decision making. That wave has introduced simulation as a powerful optimization and development tool in the manufacturing industry. Input data collection is a significant and complex event in the process of simulation. The simulation professionals have grown to accept it is as a strenuous but necessary task. Due to the nature of this task, data collection problems are numerous and vary depending on the situation. These problems may involve time consumption, lack of data, lack of structure, etc. This study concentrates on the challenges of input data collection …

Public Tort Litigation: Public Benefit Or Public Nuisance?, Richard C. Ausness

Law Faculty Scholarly Articles

One of the latest developments in products liability law is "public tort" litigation. Public tort or government-sponsored lawsuits are actions by federal, state, or local government entities to recover the cost of public services provided to persons who have been injured as the result of a defendant's alleged misconduct. The best known example is the tobacco litigation of the mid-1990s in which more than forty states brought suit against the leading tobacco companies to recoup the cost of providing health care services to indigent smokers. Eventually, the tobacco companies agreed to pay the states more than $200 billion and also …