Browsing Mechanical Engineering & Applied Mechanics Masters Theses by Title
Now showing items 57-76 of 103
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Lubrication and Wear at Metal/HDPE Contacts
(North Dakota State University, 2012)In the thesis lubrication and wear at metal/HDPE contacts was addressed. In particular this type of contact occurs in artificial joint replacements. Wear of HDPE was recognized as a major factor limiting device performance. In ... -
Mechanical Analysis of Polycarbonate/Polysiloxane Block Copolymers and Blends
(North Dakota State University, 2013)Polydimethylsiloxane (PDMS) can be used to react with polycarbonate (PC) to generate PC-PDMS multiblock copolymers and PC/PC-PDMS-PC triblock blends to overcome the notch sensitivity of PC while maintaining its transparency. ... -
Mechanical and Surface Properties of Technical and Single Flax Fiber in Micro and Nano Scale
(North Dakota State University, 2017)The continued search for sustainable and eco-friendly materials led to the integration of bio-fibers as the reinforcement in composite materials. However, a wide variation in their mechanical properties poses a considerable ... -
Method for Compliance Controlled Adhesive Switching and Magnetically Controlled Switchable Adhesives
(North Dakota State University, 2013)Adhesives are used in a variety of ways and are so common that they are easily overlooked. Adhesive hooks, tapes, glues, and switchable climbing mechanisms used by insects and lizards are clear examples of how adhesives ... -
A Micromechanical Procedure to Characterize the Effect of Interface in Fibrous Composites and Brain White Matter
(North Dakota State University, 2012)A micromechanics computational algorithm for fibrous composites including fiber, matrix and interface is introduced to study the impact of interface on composite behavior. The domains are modeled by finite elements with ... -
Microstructural Characteristics and Mechanical Behavior of Anticorrosive Al-Zn Thermal Spray Coatings Deposited by Wire Arc Spraying and Cold Spraying Techniques
(North Dakota State University, 2019)Mechanical properties of thermal spray deposited coatings are highly influenced by their microstructural characteristics. The objective of this investigation is to evaluate the mechanical properties of thermally sprayed ... -
Minimum Favorable Conditions for Hydrogen-Diesel Combustion
(North Dakota State University, 2016)A test apparatus was designed and fabricated that allowed very small amounts of diesel fuel to be injected into a hydrogen-air mixture. This apparatus was designed to be able to operate near the limits of diesel fuel ... -
Modal Analysis of the Human Brain Using Dynamic Mode Decomposition
(North Dakota State University, 2020)The human brain is the most important organ of the human body. It controls our thoughts, movements and emotions. For that reason, protecting the brain from harm is of the utmost importance but to protect the brain, one ... -
Modeling and Optimal Control of Curvatures in IPMC's
(North Dakota State University, 2014)There has been a growing number of research activities in the area of using smart materials in day to day lives because of their ability to serve both as sensors and actuators. Ionic Polymer Metal Composites (IPMCs) are ... -
A Molecular Dynamics Study of Mechanical Properties of Carbon Nanotube Polymer Composites and Graphene Nanoplatelet Polymer Composites
(North Dakota State University, 2010)Carbon nanotubes have been the main focus in science and engineering fields lately for their extraordinary properties. But carbon nanotube fabrication process is very expensive, particularly for reinforcements and ... -
Nanomechanical Characterization of Tobacco Mosaic Virus Superlattice with Novel Atomic Force Microscopy Methods
(North Dakota State University, 2013)Tobacco mosaic virus (TMV) has been widely studied due to its excellent properties. In order to utilize TMV superlattice, this thesis initiates the study on its mechanical properties. The elastic modulus of TMV superlattice ... -
Numerical Analysis of a PV/Microchannel Integrated CO2 Direct-Expansion Heat Pump Water Heater
(North Dakota State University, 2019)A steady-state numerical model of a PV/microchannel integrated direct-expansion CO2 heat pump (PV-DXHP) water heater is developed, validated, and analyzed in the present study. To accomplish the objectives, a numerical ... -
Numerical Investigation of Vibration in a Steam Turbine Control Valve
(North Dakota State University, 2017)A numerical analysis is performed at North Dakota State University to investigate and resolve steam inlet control valve vibration in a Minnkota Power Cooperative turbine. Pressure fluctuations resulting from an unstable ... -
Numerical Methods for Fractional Optimal Control and Parametric Problems
(North Dakota State University, 2011)Fractional derivatives (FDs) or derivatives of arbitrary order have attracted considerable interest in the past few decades, and almost every field of science and engineering has applications of fractional derivatives. ... -
Numerical Simulation of a Direct Expansion Geothermal Heat Pump Using Carbon Dioxide in a Transcritical Cycle
(North Dakota State University, 2011)Many of the synthetic refrigerants used in heat pump and air conditioning systems are potent greenhouse gases. In light of the increasing concern regarding climate change, there has been an increased interest in natural ... -
Numerical Simulation of Direct Expansion Solar-Assisted Heat Pump Water Heater Using Carbon Dioxide as Refrigerant
(North Dakota State University, 2013)Compared to the conventional solar-assisted heat pump (SAHP) water heating system, a relatively more compact direct-expansion solar assisted heat pump (DX-SAHP) has been introduced, in which the solar collector acts as an ... -
Numerical Simulations of Electrohydrodynamic Evolution of Thin Polymer Films
(North Dakota State University, 2015)Recently developed needleless electrospinning and electrolithography are two successful techniques that have been utilized extensively for low-cost, scalable, and continuous nano-fabrication. Rational understanding of the ... -
Numerical Simulations of Incompressible and Compressible Transitional Turbine Flows
(North Dakota State University, 2014)Accurate and reliable turbulence and transition models are needed for prediction heating loads in the hot section of the turbine, and predicting aerodynamic losses when designing new blade profiles. Two dimensional ... -
Numerical Studies of Droplet Behavior in a Steady Non-Uniform Electric Field
(North Dakota State University, 2013)An initially uncharged droplet suspended in another immiscible fluid under the influence of a steady non-uniform electric field may experience deformation, migration and bursting. This work numerically investigated the ... -
A Numerical Study and Optimization of a Morphing and Pitching Boeing Vertol VR-12 Rotorcraft Airfoil
(North Dakota State University, 2022)The helicopter blade has not undergone any major change in design in recent history, only minor adjustments like swept blade tips, variable twist blade, and application of small gurney flap style trailing edge devices. ...