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Design Verification Of Expansion Joints Using Finite Element, Khoi Trinh
Design Verification Of Expansion Joints Using Finite Element, Khoi Trinh
Theses
An elastomeric expansion joint is a flexible connector fabricated of elastomers, fabrics and, in some cases, metallic reinforcements. The function of the expansion joint is to relieve stress in piping systems due to thermal fluctuation, vibration and/or piping settlement. In safety related applications, such as piping systems in nuclear power plants where the performance of the expansion joint is critical, the design must be verified to ensure all requirements are met. The objective of this project is to implement finite element as a design tool to aid the design and analysis of the expansion joints. An extensive study of a …
Switching Voltage Of Micro-Beam Actuators - Analysis, Fabrication And Test, Eui-Shin Kim
Switching Voltage Of Micro-Beam Actuators - Analysis, Fabrication And Test, Eui-Shin Kim
Theses
This thesis introduces an analysis, fabrication and testing of a //-cantilever. First, the theoretical method used to analyze the deflection of a micro-beam with two supports and switching voltage is introduced. The results are compared to an I-DEAS simulation. Second, the theoretical approach is modified in order to be suitable for the actual //- cantilever beam model because the material, geometry and the type of structure have been changed. The switching voltage of each beam size is predicted using the modified method. Third, a series of single //-cantilever beams are designed according to the MEMS design rules. Using the facilities …
An Investigation Into The Sources Of Vehicle Tire Noise, John Paoff
An Investigation Into The Sources Of Vehicle Tire Noise, John Paoff
Theses
Noise produced by a rolling tire on pavement has plagued automakers for years due to its complexity. Tire noise is dependent on many things such as tire material, tire construction, road surface texture, etc. In this investigation, an acoustical approach to modeling tire noise is presented. Based on the mechanics of a rotating tire, acoustical models can be developed. This, along with some acoustical analysis, leads to mathematical models that one can utilize in order to predict the noise that the tire will produce. These models will provide a good basis and starting point for reduction of tire noise and …
Vehicle Simulations Of Fuel Economy For An Automatic Transmission And A Ratio Limited Continuously Variable Transmission, Hemant Suthar
Vehicle Simulations Of Fuel Economy For An Automatic Transmission And A Ratio Limited Continuously Variable Transmission, Hemant Suthar
Theses
An automatic transmission (AT) of a vehicle was compared with a ratio limited Continuously Variable Transmission (CVT). Dynamic model of a passenger car was simulated to compare the overall efficiency of the vehicle equipped with these different types of transmissions. The overall efficiencies were calculated in terms of fuel consumption of the vehicle. The results are based on the Environmental Protection Agency's (EPA) city and highway driving cycles. A Modular approach is taken to model an existing vehicle. The complete model is subdivided into an engine model, road load model, throttle and brake pedal models, and a transmission model. The …
Analysis Of The Droplet Size Reduction In A Pmdi To The Addition Of A Turbulence Generating Nozzle, Michael Medlar
Analysis Of The Droplet Size Reduction In A Pmdi To The Addition Of A Turbulence Generating Nozzle, Michael Medlar
Theses
Pharmaceutical inhalation aerosol technology has become an important therapy for the treatment of both respiratory and non-respiratory illness. Targeting therapeutic aerosols to the small airways of the lung can effectively treat many of these diseases. Delivery of the therapeutic agent directly to the site of action, for cases involving respiratory diseases, ensures an adequate therapeutic level of the drug is reached, without leading to side effects due to high systemic concentrations. For non-respiratory diseases, the periphery of the lung offers enormous surface area (approximately 100m2) for rapid absorption into circulation. In either case, the appropriate spray characteristics (0.5 um
Feasibility Study Of A Permanently Implanted Prosthetic Hand, Matt Williams
Feasibility Study Of A Permanently Implanted Prosthetic Hand, Matt Williams
Theses
The feasibility of a permanently implanted prosthetic hand was evaluated from both an internal biocompatibility and exterior mechanics point of view. A literature review of the issues involved in permanent implantation of a percutanious device was performed in the areas of bone interaction and fixation and neural interface control. A theoretical implant was designed for a 90th percentile male, using an HA-G-Ti composite material to provide a permanent base to which the hand could attach. Using a radial implant length of 1.87 inches and an ulna implant length of 1.32 inches, the simulated implant could withstand a push out force …
Deep Structures Wet Etched Into Lithium Niobate Using A Physical Mask, Andrew Randles
Deep Structures Wet Etched Into Lithium Niobate Using A Physical Mask, Andrew Randles
Theses
The present work is an investigation and characterization of a new technique for etching and masking Lithium niobate (LiNb03) to realize high aspect ratio trenches. LiNb03 is a single crystal optically clear (from 350 nm to 5 micometer wavelength), piezoelectric material. It is also inert to most reactants and has a high curie temperature (the temperature that a material loses its piezoelectric effect). These properties allow LiNb03 to be used as a sensor or actuator in harsh environments. To realize this actuator/sensor a multilevel lithium niobate deep etching technique is currently unavailable. The present work uses a chrome gold mask …
A Demonstration In Communication And Task Completion Between Two Autonomous Robots, Adam Renzi
A Demonstration In Communication And Task Completion Between Two Autonomous Robots, Adam Renzi
Theses
The world of robotics is rapidly changing. No more are the days of robotics classes being taught that focus merely on highly industrial, automation robots. Today's robotics is focusing more and more on microcontrollers and their implementation into everyday life. Miniature robotics and how it is implemented to make common tasks easier is becoming the focus of many robotics classes across the world. Microcontrollers allow users to control several inputs and outputs to complete somewhat difficult tasks. In today's society, one might find a microcontroller in anything from a computer to the average household toaster. As time has passed, microcontrollers …
Experimental Evaluation Of Impulse Turbine Designs For Chain Testing Systems, Aaron Donlon
Experimental Evaluation Of Impulse Turbine Designs For Chain Testing Systems, Aaron Donlon
Theses
There are several ways to test automotive timing chains for wear in a laboratory environment. One novel method proposed by Borg-Warner Morse TEC uses fluid jets striking an impeller blade. The momentum of the oil striking and deflected by the impeller blade is used to produce a torque. This torque is transmitted to the system through the timing chain. A previous theoretical design study (conducted elsewhere) evaluated some of the design factors as they related to machine performance and ultimately to the torque loads applied to the chain. From this theoretical study came the design for two novel bucket and …