Browsing Auburn Theses and Dissertations by Author "Jackson, Robert"

Now showing items 1-20 of 48

An Analysis of Elastic Rough Contact Models

Xu, Yang (2012-07-27)

The problem of elastic contact between one nominally flat rough surface and one rigid flat is studied. A variety of contact models have been applied to this problem since the pioneering work of Archard in 1956. Those contact ...

An Analysis of Surface Roughness and its Influence on a Thrust Bearing

Zhang, Xiaohan (2018-07-24)

Thrust bearings are a widely used type of bearing in many rotary industrial applications. In this work, a thrust bearing surface under the mixed lubrication regime is analyzed. A new model which coupled the mechanical ...

Bipedal Impact with Granular Matter

Banu, Eliza (2014-11-06)

Impact with granular matter has been of great interest to researchers for decades, mainly because the material, as a conglomeration of discrete solids, behaves as a fluid until a solid like behavior becomes established. ...

Characterization of Die Stresses in Large Area Array Flip Chip Packages

Roberts, Jordan (2008-08-15)

Microprocessor packaging in modern workstations and servers often consists of one or more large flip chip die that are mounted to a high performance ceramic chip carrier. The final assembly configuration features a complex ...

A Comparison between the Mechanical Behaviors of Different Equine Articular Cartilage Surfaces

Lee, Hyeon (2013-07-18)

In order to determine the stiffness and thickness of the equine articular cartilage, an indentation test and needle probe test were performed on fresh equine articular cartilage surfaces from the fetlock, carpal, and stifle ...

Compression Response and Modeling of Interpenetrating Phase Composites and Foam-Filled Honeycombs

Jhaver, Rahul (2009-08-03)

Although multiphase materials with discrete, dispersed and/or embedded phases in a matrix have been evolving over the years, there are limitations in terms of the degree of concentration of the secondary phase that can be ...

Damage Prediction of Lead Free Ball Grid Array Packages Under Shock and Drop Environment

Panchagade, Dhananjay (2007-05-15)

The fatigue and damage of solder joints and also the potential for interface failure within BGA packages are caused by thermal cycling. In case of portable electronic products, fatigue is caused by repetitive drop and shock ...

Deterministic Elastic-Plastic Modelling of Rough Surface Contact including Spectral Interpolation and Comparison to Theoretical Models

An, Bowen (2017-11-17)

Rough surfaces can be seen everywhere in our world, such as on table surfaces, roads, or cellphone screens. The interactions of rough surfaces are essential problems because they govern friction, wear, contact resistance ...

Development of the Contact Models to Determine Electrical Contact Resistance Including a Coupled Electro-thermo-mechanical Analysis Considering Temperature-Dependent Material Properties

Saha, Swarna (2020-07-22)

Reliability of the electrical contact or interface is one of the major concerns in many applications such as batteries, solar cells, electrical connectors, MEMS based sensors for hybrid and electric vehicles, electronic ...

A Diagnostic Tool for Neuropathy Assessment on the Plantar Surface of the Foot

Castellano, Vitale (2020-07-10)

Neuropathy is categorized as a loss of sensation in the extremities, particularly in the hands and feet. It is often found in people with diabetes and is present in 40-60 million people. Symptoms include burning, numbness, ...

The Effect of Asperity Geometry on Elastic-Plastic Statistical and Multi-scale Rough Surface Contact Models

Chu, Nolan (2018-04-20)

The solution to an elastic-plastic contact problem can be applied to many phenomena such as friction, wear, and thermal contact resistance. Many models have been developed to solve it. A deterministic approach accurately ...

The Effect of Sand on the Wear of Anodized Aluminum

Pope, Sara (2014-12-04)

Sand can cause excessive wear in mechanical systems, especially when the motion is frequent and small in amplitude. A modified block-on-flat wear test of anodized aluminum on hard coat anodized aluminum was used to study ...

Ex-Vivo Biomechanical Testing of Tendon Implant Device for the Repair of Equine Flexor Tendon Lacerations

Barrett, Elizabeth (2013-07-10)

Flexor tendon lacerations are a serious injury in horses that are life threatening and often career ending. An ideal tendon repair allows rapid return to weight bearing by providing a high strength to failure, high resistance ...

Experimental And Analytical Investigation Of A Dynamic Gas Squeeze Film Bearing Including Asperity Contact Effects

Mahajan, Manoj (2006-12-15)

This thesis presents a theoretical and an experimental investigation of planar gas squeeze film bearings. The thickness and pressure profile of the gas squeeze film are obtained by simultaneously solving the Reynolds ...

Experimental and Theoretical Analysis of the Impact with Solid and Flexible Surfaces

Cermik, Ozdes (2017-04-21)

Impact plays an important role in many engineering applications, mechanical systems, and different areas such as robotics, machine design, etc. It is a complex phenomenon that occurs when two or more bodies collide. In the ...

Experimental and Theoretical Investigation of Contact Resistance and Reliability of Lateral Contact Type Ohmic MEMS Relays

Almeida, Lia (2006-12-15)

In this thesis, the reliability of electrostatically actuated ohmic contact type MEMS relays has been investigated. Multi-contact MEMS relays using electrostatic comb-drive actuators have been used in this study. The ...

An Experimental Investigation and a Multiscale Electro-thermo-mechanical Model of a Flat Pin High Power Electrical Connector

Angadi, Santosh (2011-11-03)

Hybrid and electrical vehicles (HEV) are the next evolutionary step in automobile technology. However, the electrical systems which propel HEVs are fundamentally different from conventional technologies. Therefore, a few ...

Fiction Stir Welding of 5083-H131 Aluminum Alloy using A2 and H13 Tool Steels or 420 Stainless Steel Tooling

Evans, Justin (2014-12-09)

Friction Stir Welding (FSW) is a solid state welding method developed by The Welding Institute. The process is environmentally friendly, highly repetitive and easily adapted to manufacturing geometries. New welding schedules ...

Fluid Flow and Heat Transfer in Cavities with Inlet and Outlet Ports: Effect of Flow Oscillation and Application to Design of Microvalves

Saeidi, Seyed (2005-12-15)

A Computational Fluid Dynamics (CFD) code is developed and tested to solve the two-dimensional form of the Navier-Stokes and energy equations. The flow field and heat transfer in a square cavity with inlet and outlet ports ...

Health Monitoring for Damage Initiation & Progression During Mechanical Shock in Electronic Assemblies

Choudhary, Prakriti (2007-05-15)

Electronic products may be subjected to shock and vibration during shipping, normal usage and accidental drop. Highstrain rate transient bending produced by such loads may result in failure of fine-pitch electronics. Current ...