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- masters theses (x)
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- Title
- A GENERAL THERMAL THICKNESS MODEL AND A HEATING RATE RELATED IGNITION CRITERION FOR COMBUSTIBLE SOLIDS
- Author
- Tian, Ning
- Date Created
- 2013
- Subjects--Topical
- Mechanical engineering
- Description
- The objective of this research is to investigate the ignition behavior of combustible solid materials in fire. Three key tasks were conducted for it: (1) a new theoretical temperature profile prediction model, referred as General Thermal Thickness...
- Title
- A MACHINING STABILITY MODEL WITH PROCESS DAMPING FOR HARD-TO-MACHINE MATERIALS
- Author
- Tyler, Christopher
- Date Created
- 2015
- Subjects--Topical
- Mechanical engineering
- Description
- A substantial fraction of current machining research is directed towards increased productivity. A fundamental limitation is unstable vibration, or chatter, during cutting. Stability lobe diagrams, which relate the allowable chip width to spindle ...
- Title
- A MESHLESS METHOD WITH ENRICHED BASIS FUNCTIONS FOR SINGULARITY PROBLEMS
- Author
- Hong, Won-Tak
- Date Created
- 2009
- Subjects--Topical
- Mechanical engineering, Mechanics, Mathematics
- Description
- For the last several decades, the Finite Element Method (FEM) has been a powerful tool in solving challenging science and engineering problems, especially when solution domains have complex geometry. However the mesh refinements and construction o...
- Title
- A Novel Fluorescence Based Method of Assessing Subsurface Damage in Optical Materials
- Author
- Williams, Wesley
- Date Created
- 2009
- Subjects--Topical
- Mechanical engineering, Materials science, Optics
- Description
- Lapping and polishing are loose abrasive finishing processes that have been used to achieve critical surface parameters in optical materials for centuries. These processes remove material from the surface through a variety of mechanical and chemic...
- Title
- A Numerical Study of Inhomogeneous Variable-Density Turbulence in Planar and Convergent Geometries.
- Author
- Djibrilla Boureima, Ismael
- Date Created
- 2019
- Subjects--Topical
- Mechanical engineering
- Description
- ISMAEL DJIBRILLA BOUREIMA. A Numerical Study of Inhomogeneous Variable-Density Turbulence in Planar and Convergent Geometries. (Under the direction of DR. PRAVEEN RAMAPRABHU)Hydrodynamic instabilities govern the growth of perturbations at the inte...
- Title
- A PROCESS TO EVALUATE COMMERCIAL SOFTWARE PACKAGES THAT ESTIMATE MEASUREMENT UNCERTAINTY THROUGH SIMULATION
- Author
- BEAMAN, JONATHAN
- Date Created
- 2011
- Subjects--Topical
- Mechanical engineering
- Description
- Coordinate Measuring Machines (CMMs) can be used to measure a great variety of parts. Essentially, any three-dimensional surface can be evaluated. Characterizing the measurement uncertainty in a way that maintains traceability in accordance with i...
- Title
- A Semi-Quantitative Schlieren High-Speed Flow Diagnostic: Analysis of High-Pressure-Ratio, Overexpanded Planar Flow in Rocket Nozzles
- Author
- Thorsett-Hill, Karen
- Date Created
- 2012
- Subjects--Topical
- Mechanical engineering
- Description
- This work introduces a semi-quantitative schlieren (SQS) method which is used to qualitatively and quantitatively analyze complex, unsteady, compressible flows in a small, planar convergent-divergent nozzle. A basic schlieren system is used to ima...
- Title
- A comprehensive study of the microstructure and mechanical behavior of HCP-based multilayered nanofilms
- Author
- Lu, Yuanyuan
- Date Created
- 2014
- Subjects--Topical
- Mechanical engineering, Materials science
- Description
-
Metallic multilayer films with the individual layer thickness
h decreased to submicron or even less have attracted a great deal of attention over the past decades because of their impressive mechanical properties, especially the high strength. Mos...
- Title
- A numerical study of tillage tool wear during plowing of sandy soil
- Author
- GOEL, GAURAV
- Date Created
- 2013
- Subjects--Topical
- Mechanical engineering
- Description
- Wear of tillage tools during tilling operations leads to increase in power requirements, frequent downtimes for tool replacement, loss of production and an increase in the equipment and operational costs. A large number of variables - such as the ...
- Title
- Additive Manufacturing of 3D Printed SiC Composites: Strengthening and Densification through Surface Modification and Use of Mineral Binders
- Author
- Chandrasekaran, Sujithra
- Date Created
- 2023
- Subjects--Topical
- Engineering, Materials science, Mechanical engineering
- Description
- Manufacturing of dense SiC composites counts mainly on the thermal oxidation of the carbide into silica. The irregularity of the silica layer and its limited thickness weaken the bond between particles and diminish the good thermo-mechanical prope...
- Title
- Additive manufacturing of PVDF-TrFE piezoelectric and pyroelectric sensors
- Author
- Marandi, Rafi
- Date Created
- 2023
- Subjects--Topical
- Mechanical engineering
- Description
- Additive manufacturing, specifically Fused Deposition Modeling (FDM) method, has emerged as a promising technique for rapid prototyping. Using FDM, complex geometries can be created using precise layer by layer deposition of material. Among the ad...
- Title
- Analysis of Tip Injection Parameters at Different Tip Clearance Sizes on the Performance of the Transonic Axial Compressor Rotor
- Author
- Sheikhshahrokhdehkordi, Mohammadamin
- Date Created
- 2023
- Subjects--Topical
- Mechanical engineering
- Description
- The main objective of this thesis is to investigate the near-stall endwall flow structures of the gap between the blade and the casing on the performance and the rotor stability of a transonic compressor rotor with and without high-speed endwall a...
- Title
- Analytical modeling framework for performance degradation of PEM fuel cells during startup-shutdown cycles
- Author
- Xu, Jun, Yin, Sha, Li, Yunqi, Chen, Xiran
- Date Created
- 2020
- Subjects--Topical
- Mechanical engineering, Fuel cells
- Description
- Startup-shutdown cycling is one of the main factors that contribute to fuel cell deterioration related to high cathode potential. In this study, a coupled model with the carbon corrosion model and agglomerate model of the cathode catalyst layer is...
- Title
- Areal gear metrology with modified flanks
- Author
- Ni, Kang
- Date Created
- 2017
- Subjects--Topical
- Mechanical engineering
- Description
- Gears are critical mechanical components in power transmission systems, used across a board spectrum of industries such as automobile, aerospace and renewable energy. Given the advancement of design and manufacture of gears in the past decades, th...
- Title
- Aspects of Turbulence and Stochastic Processes in Fluid Mechanics
- Author
- Dahlberg, Jerry
- Date Created
- 2018
- Subjects--Topical
- Mechanical engineering, Fluid mechanics
- Description
- Three experimental studies are executed to examine aspects of turbulence and stochastic processes in fluid mechanics. Each experimental study is conducted in a different medium; water, wind and vibrated grain piles. Each study requires upgrades to...
- Title
- BUCKLING LOAD PREDICTIONS IN PRESSURE VESSELS UTILIZING MONTE CARLO METHOD
- Author
- Brar, Gurinder
- Date Created
- 2009
- Subjects--Topical
- Mechanical engineering
- Description
- In practice, large diameter, thin wall shells of revolution are never fabricated with constant diameters and thicknesses over the entire length of the assembly. These initial geometric imperfections have significant effect on the load carrying cap...
- Title
- CHARACTERIZATION OF ENGINEERED SURFACES
- Author
- Verma, Ritwik
- Date Created
- 2010
- Subjects--Topical
- Mechanical engineering
- Description
- In the recent years there has been an increasing interest in manufacturing products where surface topography plays a functional role. These surfaces are called engineered surfaces and are used in a variety of industries like semi conductor, data s...
- Title
- COMPARATIVE STUDY OF THE EFFECT OF IMPURITIES ON THE DUCTILITY OF TANTALUM AND TUNGSTEN BASED ON ATOMISTIC AND FIRST PRINCIPLES CALCULATIONS
- Author
- Pan, Zhiliang
- Date Created
- 2012
- Subjects--Topical
- Mechanical engineering, Materials science
- Description
-
Tungsten and tantalum are neighbors in the Periodic Table of the Elements and, as refractory metals, both have very high melting points (tungsten: 3422
o C, tantalum: 2996o C). However, the ductility of the two metals is quite different especially at...
- Title
- COMPRESSIVE BEHAVIOR OF BULK METALLIC GLASS UNDER DIFFERENT CONDITIONS - COUPLED EFFECT OF TEMPERATURE AND STRAIN RATE
- Author
- Yin, Weihua
- Date Created
- 2013
- Subjects--Topical
- Mechanical engineering, Materials science
- Description
- Metallic glass was rst reported in 1960 by rapid quenching of Au-Si alloys. But, due to the size limitation, this material did not attract remarkable interest until the development of bulk metallic glasses (BMGs) with specimen sizes in excess of 1...
- Title
- CONSTITUTIVE MODELING OF ALUMINUM FOAM AND FINITE ELEMENT IMPLEMENTATION FOR CRASH SIMULATIONS
- Author
- Bi, Jing
- Date Created
- 2012
- Subjects--Topical
- Mechanical engineering, Engineering
- Description
- In the past decades metallic foams have been increasingly used as filler materials in crashworthiness applications due to their relatively low cost and high capacity of energy absorption. Due to the destructive nature of crashes, studies on the pe...