Browsing by Author "Jackson, Robert"

Now showing items 21-40 of 48

Health Monitoring for Flywheel Rotors Supported By Active Magnetic Bearings

Barber, Kelly (2006-08-15)

Magnetic bearings are not a new technology in themselves, yet the control and implementation of such devices is still a budding science. Magnetic bearings are particularly attractive for some applications because of the ...

High Speed Videographic Quick Stop Device for Orthogonal Machining

Wortman, Chase (2013-12-04)

Advances in digital high speed video acquisition make it possible to create a fully integrated virtual quick stop device to observe the orthogonal metal cutting process in real time. This research aims to provide additional ...

Hydraulic Solenoid Valve Reliability and Modeling Study

Angadi, Santosh (2008-12-15)

The current work has studied the reliability of a solenoid valve (SV) used in automobile transmissions through a joint theoretical and experimental approach. Based on an extensive literature search, the most common failures ...

Investigation of Al2O3 Nanoparticle Laden Lubricants and Refrigerant Mixtures During Two-Phase Flow Boiling

Bigi, Andrea A. M. (2018-04-27)

In space conditioning and in cooling systems for high power density electronics, vapor compression cycles provide cooling. The working fluid is a refrigerant and oil mixture. A small amount of oil is needed to lubricate ...

The Investigation of Haliotis Rufescens (Red Abalone): Mesolayer Growth & Mechanical Behavior

Zhang, Anqi (2017-11-30)

Self-assembly is a popular bottom-up process which results in highly-ordered and fine structures in micro- or nano-scale. The special structures produced through the self-assembly are always related to some unique and ...

Investigation of Lateral Performance of an ATV Tire on Natural, Deformable Surfaces

Krueger, Darrell (2007-12-15)

A study is undertaken to discover links between soil-rubber interface strength, camber, pressure and lateral performance of a front ATV tire. New tire and soil test rigs are also designed and fabricated for the support ...

Modeling and Validation of Hitched Loading Effects on Tractor Yaw Dynamics

Pearson, Paul (2007-05-15)

This thesis develops a yaw dynamic model for a farm tractor with a hitched implement, which can be used to understand the effect of tractor handling characteristics for design applications as well as for new automated ...

Modeling of Frictional Gas Flow in a Piezoelectrically Actuated High-Pressure Microvalve for Flowrate Control

Johnson, Christopher (2005-12-15)

One-dimensional modeling of frictional compressible gaseous flow through a high-pressure piezoelectrically-actuated microvalve is studied. Focusing on the micro-scale gap between the boss and seat plates, variations of ...

Modeling, Validation and Analysis of Degradation Processes of Lithium Ion Polymer Batteries

Fu, Rujian (2014-07-29)

The lithium ion polymer battery (LiPB) has become one of the most widely used energy storage devices because of its high energy and power densities. However, its performance and life span are limited by the degradation ...

A Multi-Physics Finite Element Analysis of Round Pin, High Power Connectors

Polchow, John (2010-04-15)

In the past decade, the general public’s means of transportation has begun to undergo a radical transformation, moving away from only using gasoline and moving toward using a combination of gasoline and electricity. This ...

A Non-contact Method for Sensing Tire Contact Patch Deformation Using a Monocular Vision System and Speckled Image Tracking

Green, Russell (2011-05-16)

A full-field, non-contact deformation sensing system was developed with an application for tires. Using an image tracking algorithm, in-plane displacements and their gradients were calculated. Furthermore, the effects of ...

Novel Self-Adapting Microscale Surface Textures For Hydrodynamic Lubrication

Duvvuru, Ravi (2007-12-15)

The tribological performance of a lubricated surface depends largely on the ability of the surface to maintain a sufficient film thickness under high loads. One way of improving the performance is to modify the surface ...

Production of High pH Value Bio-oil from Woody Biomass and Poultry Litter

Ravindran, Harideepan (2011-07-25)

Fast pyrolysis, a biomass to liquid conversion process, has attracted a lot of interest from industry and academia due to its high oil yield. Bio-oil can be produced from various biomass feedstocks that are regionally ...

Reaction mechanism of CaO-MgO-Al2O3-SiO2 (CMAS) on lanthanide zirconia thermal barrier coatings

Wang, Honglong (2016-01-27)

Higher operating temperature could improve energy efficiency in the gas turbine engines, and thus, thermal barrier system is applied to protect the superalloy blades from the high temperature. Thermal barrier system is a ...

A ROUGH SURFACE MIXED LUBRICATION MODEL OF MACHINE COMPONENT INTERFACES WITH AN EXPERIEMENTAL EVALUATION

Chu, Nolan (2023-05-02) ETD File Embargoed

This work develops a numerical methodology for predicting the performance of an automotive piston ring system by considering contact and lubrication mechanics. The rough surface contact mechanics and lubrication occurs ...

Solder Joint Reliability in Electronics Under Shock and Vibration Using Explicit Finite-Element Sub-Modeling

Gupte, Sameepulhas (2007-05-15)

Solder joint failure in electronic devices subject to shock and drop environment is one of the key concerns for the telecommunications industry. The recent trend towards miniaturization and increased functional density has ...

Statistical Models of Nominally Flat Rough Surface Contact

Xu, Yang (2017-12-01)

In this dissertation, the linear elastic contact between a nominally-flat rough surface and a rigid flat is studied analytically and numerically. When the roughness is excluded from the surface, the corresponding contact ...

A Study of Crack-Inclusion Interaction Using Moiré Interferometry and Finite Element Analysis

Savalia, Piyush-Chunilal (2006-12-15)

Failure of composite materials is intrinsically linked to the fundamental problem of a matrix crack interacting with a second phase inclusion. In this work, the critical issue of matrix-inclusion debonding in the presence ...

A Study of Elastic Plastic Deformation of Heavily Deformed Spherical Surfaces

Wadwalkar, Saurabh (2009-11-20)

This work uses a finite element analysis and analytical equations to model elastic-plastic and fully plastic large deformations of spheres in contact with rigid flat surfaces. The case considered here is of a deformable ...

A Study of the Effect of Various Material Combinations on the Bolted Contacts of Busbars

Gatherer, James (2013-07-11)

The reliability of bolted joints is a concern for high-powered devices as the generated heat and thermal expansion could loosen the connections over many actuation cycles. There currently appears to be relatively little ...