Browsing Dissertations & Theses by Title
Now showing items 1-20 of 899
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3-D Fracture Study Of The BEoL Cu/Low-k Stack To Assess And Mitigate The CPI Risk During The Reflow Process
(Mechanical Engineering, 2014-03-12)As scaling of components continues, using SiO2 as a dielectric in the Back-End-Of-Line (BEoL) is no longer a viable option and can be replaced with low-k and ultralow-k (ULK) dielectric materials for advanced integrated ... -
A COMPARATIVE STUDY OF THE THERMO-MECHANICAL BEHAVIOR OF WCSP ASSEMBLY DUE TO DIFFERENCE IN PCBS’ LAYER THICKNESS
(2016-05-10)The reliability of Chip Scale Package assembly is of great concern for the electronic industry. Due to multiple function integration of the present devices there is a high demand of ultra-miniaturization of the integrated ... -
A COMPARATIVE STUDY OF WOODEN AND COMPOSITE CROSSARM OF AN ELECTRIC UTILITY POLE
(2017-05-12)Currently, most of the crossarms existing in the nation are made of wood. However, wood has a set of negative features like shorter life span due to environmental cracking, damages by insects and birds. Secondly, an ... -
A COMPARATIVE STUDY OF WOODEN AND HYRBID COMPOSITE CROSSARMS OF AN ELECTRIC UTILITY POLE
(2018-01-08)Most of the cross arms in the country are made from wood. Wood, although easily accessible, has its own defects. Environmental effects which includes the expansion and contraction of wood over the years which will disrupt ... -
A Comparison of Discrete Damage Modeling Methods: the Effect of Stacking Sequence on Progressive Failure of the Skin Laminate in a Composite Pi-joint Subject to Pull-off Load
(2019-05-07)Discrete damage modeling of composite failure mechanisms including delamination, matrix cracking, and their interactions was performed for the skin laminate in a composite pi-joint test specimen subject to a pull-off load. ... -
A DESIGN METHODOLOGY FOR CONTINUOUS FIBER ADDITIVE MANUFACTURING USING ADVANCED COMPUTER AIDED ENGINEERING TECHNIQUES
(2018-01-19)A design methodology for Continuous Carbon Fiber Additive Manufacturing (CCFAM) developed using Computer Aided Engineering (CAE) techniques takes advantage of both the mechanical strength of composite materials and the ... -
A FRAMEWORK FOR EMPLOYING FEMTOSATELLITES IN PLANETARY SCIENCE MISSIONS, INCLUDING A PROPOSED MISSION CONCEPT FOR TITAN
(2017-01-02)Over the past 15 years, there has been a growing interest in femtosatellites, a class of tiny satellites having mass less than 100 grams. Research groups from Peru, Spain, England, Canada, and the United States have proposed ... -
A Framework for Optimal Path Planning and Nonlinear Guidance for Autonomous Mobile Robots
(2018-08-15)The purpose of this research is to investigate methods and technology for enhancing autonomous capabilities for mobile robots. The measures of autonomy which are specifically covered in this dissertation pertain to a mobile ... -
A mesh based boom to stop oil spread
(2016-05-10)In this work, we develop a new boom to separate oil and water. In a commonly used boom, a membrane that has no pores is normally used to block oil spread. Since this membrane also blocks water flow, high pressure is easy ... -
A Methodology for Topology and Lattice Structure Optimization of a Cargo Drone Motor Mount
(2018-01-12)This work discusses a CAE driven methodology for designing a lightweight component by performing structural configuration on a given package space, creating a closed surface along this configuration using an interactive ... -
A METHODOLOGY TO DEVELOP A CONTROL SYSTEM APP FOR DATA CENTER COOLING
(2016-12-19)DCIM (Data Center Infrastructure Management), are tools that are available in the industry to serve the purpose of controlling different parameters in the data center. But their cost is significantly high. The idea of ... -
A MICROMECHNICS APPROACH TO PREDICTING THE ONSET YIELDING ENVELOPE OF PARTICULATE COMPOSITE MATERIALS
(2018-01-05)Composite materials fail for various reasons and extensive research has been conducted both experimentally and theoretically. However, theoretical prediction of composite failure by yielding seems scarce. Adding reinforcing ... -
A MODEL ANALYSIS OF SAND INSERTION IN HYDRAULIC FRACTURES
(2015-12-02)Hydraulic fracturing (fracking) is a well-stimulation technology to create large volume of fracture formation in rocks for gas and/or oil extraction. This technology has been applied to commercially exploit natural gas in ... -
A MODULAR PLATFORM FOR INTRUSIVE DIAGNOSTICS AND TPS TESTING IN THE ONR-UTA ARC-JET FACILITY
(2021-12-21)This work presents an approach to the design, and successful experimental implementation, of a modular platform for intrusive diagnostics and TPS testing in the ONR-UTA Arc-Heated Wind Tunnel "Leste" Facility. The harsh ... -
A MOLECULAR SCALE STUDY OF CAVITATION GROWTH AND SHOCK RESPONSE IN SOFT MATERIALS
(2020-08-25)Cavitation is a mechanism through which small vapor-filled cavities are formed in a liquid medium due to rapid changes of pressure. In liquid, the cavitation bubble is created when surrounding pressure drops below the ... -
A Multiphysics Study of Interfacial Properties of 3D Printed Filaments
(2018-06-18)Fused Deposition Modeling has become the most popular 3-D printing method over the last decade. Due to its potential to save time, cost and, labor, there is a great deal of interest to use this technique for production of ... -
A Multiscale Study of Cavitation Mechanism and Damage in Soft Materials
(2020-08-25)Cavitation is defined as the formation and growth of the gaseous bubble in bulk liquid due to the tensile pressure followed by the violent collapse. The collapse of the bubble is particularly significant due to its potential ... -
A New Adaptive Multiscale Approach for the Dynamic Modeling and Simulation of Biomolecular Systems
This dissertation presents three developments in the simulation of sub-micron dynamical systems. First, a new thermostat formulation is shown to strictly enforce the constant temperature constraint necessary in many ... -
A NOVEL STRESS ANALYSIS METHOD FOR LAMINATED COMPOSITE STIFFENER WITH ASYMMETRIC Z-SECTION UNDER MECHANICAL AND THERMAL LOADING CONDITIONS
(2016-08-26)Composites structures are being used as load carrying members in latest aircrafts and performance automobiles, the design validation for such structures can be a time consuming and expensive process, if done by testing. ... -
A NUMERICAL STUDY OF CAVITATING FLOWS BASED ON PLIC-VOF METHOD FOR ARBITRARY UNSTRUCTURED MESHES
(2019-08-15)Cavitation appears when local static pressure drops below the water vapor pressure and causes significant impacts on marine propeller blades. The Volume of Fluid (VOF) method, which is also referred to as the Transport ...