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Now showing items 11-20 of 26
Fiction Stir Welding of 5083-H131 Aluminum Alloy using A2 and H13 Tool Steels or 420 Stainless Steel Tooling
(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 ...
The Effect of Sand on the Wear of Anodized Aluminum
(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 ...
An Analysis of the Multi-scale Structure of Rough Surfaces
(2014-12-04)
Even with the various surface finishing techniques, all surfaces are rough with different structures and geometric characteristics over multiple scales. The roughness impacts significantly the friction, wear, and surface ...
Effects of Aging on the Cyclic Stress Strain and Fatigue Behaviors of Lead-free Solders
(2014-08-18)
The microstructure, mechanical response, and failure behavior of lead free solder joints in electronic assemblies are constantly evolving when exposed to isothermal aging and/or thermal cycling environments. While the ...
An Analytical and Experimental Investigation of Nanoparticle Lubricants
(2014-07-29)
This work investigated the tribological effects of nanoparticle additives on lubrication through experimental and analytical investigations on colloidal lubricants. The focus of this dissertation was to investigate and ...
Evaluation of Beam Load Cell Use for Base Reaction Force Collision Detection on Industrial Robots
(2014-10-10)
This thesis evaluates the ability of four beam load cells placed under the base of an industrial robot to accurately estimate robot link parameters and detect collision. This setup can be a cheaper option than using ...
Robust Gain-Scheduled Observer Design with Application to Vehicle State Estimation
(2014-10-10)
This dissertation develops an application of the state-of-the-art convex optimization algorithms to the vehicle state estimation problem. The main challenge in this field is that the time-varying uncertain parameters and ...
Characterization of Die Stress in Microprocessor Packaging Due to Mechanical, Thermal, and Power Loading
(2014-08-05)
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 ...
Analysis of Record and Playback Errors of GPS Signals Caused by the USRP
(2014-12-10)
In this thesis, the errors created by the USRP (Universal Software Receiver Platform) during record and playback are analyzed. The USRP is used for jamming, spoo fing, and
GPS processing, and has recently become widely ...
Infiltration, Void Formation and Thermal Conductivity Improvement in Thermal Energy Storage Composites of Graphite Foam/Phase Change Materials
(2014-07-02)
Thermal energy storage (TES) composites open new opportunities in utilization of renewable energies and recycling waste heat. Development, utilization and thermal conductivity improvement of TES composites were investigated ...