Browsing Mechanical Engineering & Applied Mechanics by Title
Now showing items 94-113 of 139
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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 ... -
Nonlinear Fatigue Damage Accumulation in Aircraft Engine Alloys Multiaxial Loading
(North Dakota State University, 2013)Fatigue is considered to be one of the most frequent phenomena in the failure of many machine parts. Most of the prior studies on fatigue have been limited to uniaxial loading cases with a primary focus on constant ... -
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. ... -
Optimized Evaluation of Bone Tissue Material Properties by Inverse Finite Element Analysis and Femur Fracture Testing
(North Dakota State University, 2015)The main objective of this research is to characterize bone inhomogeneous elastic, yield, and post-yield behaviors, using a computational-experimental approach. The current study uses the force-displacement results of one ... -
Optimum Path Tracking of an Independently Steered Four Wheeled Mobile Robot
(North Dakota State University, 2012)This thesis studies the navigational control problem for an independently steered and driven four-wheeled ground robotic vehicle, a subset of the larger problem of controlling self-reconfigurable robotic vehicles. A ... -
Parametric Investigation of a Dielectric Barrier Dishcarge Plasma Actuator
(North Dakota State University, 2010)The dielectric barrier discharge (DBD) plasma actuator is considered an effective flow control device in various aerospace applications such as drag control, lift control, and stall control. The DBD plasma actuator has ... -
Performance Analysis of an Advanced Emission Reduction Technology Engine During Diesel-Hydrogen Dual Fuel Operation
(North Dakota State University, 2011)The primary objective of this study was to determine the capability of a CAT engine controlled by an advanced combustion emission reduction technology (ACERT) electronic control module to operate in a dual fuel mode. A ... -
Performance Prediction Model for a Hybrid PVT System
(North Dakota State University, 2010)Photovoltaic cells convert, depending on the cell type, 6-18% of the incoming solar radiation into electricity with a higher percentage converted into heat. The heat in turn affects the cell temperature which has direct ... -
The Physico-Chemical Investigation of Interfacial Properties in Natural Fiber/Vinyl Ester Biocomposites
(North Dakota State University, 2012)Bast fibers are one of most widely used types of cellulosic natural fibers. Flax fibers, a specific type of bast fiber, have historically been used as reinforcements in composites because they offer competitive advantages, ... -
Potential Applications of Flax Fibers
(North Dakota State University, 2018)There has been a substantial increase in the usage of natural-fibers and biodegradable polymers due to the needs of the environmental sustainability. The use of natural fibers is inclusive of wide range of applications in ... -
Potential for Industrial Vehicle Electrical Applications
(North Dakota State University, 2011)Synthetic metals are a branch of material science that deals with conducting organic molecules. The quantum mechanics of these materials show that doping can fundamentally change the conduction method and significantly ... -
Process Optimization of 3D Printing with Continuous Fiber Reinforced UV Curable Thermoset Resin
(North Dakota State University, 2022)3D printed polymer components cannot be used as structural components due to the 3D printable material property limitations. To improve mechanical properties, a composite 3D printer is developed and studied. Technical ...