• Helicopter rotor smoothing with a continuous trailing - edge flap 

  Ding, Lan (University of Alabama Libraries, 2020)

  Helicopters are prone to high vibration with its elastic blades whirling in a turbulent aerodynamic environment. The high vibration leads to discomfort of crew and passengers and shortens service life of on-board avionics, ...
• Low cost remote sensing and navigational methods for nocturnal operation of commercial unmanned aircraft systems 

  Moon, Jamie Michael (University of Alabama Libraries, 2020)

  This thesis addresses the development of low-cost remote-sensing and navigational techniques for commercial and private small, unmanned aircraft systems (sUAS) to support a multimodal surveying platform capable of navigating ...
• Development of a multiphysics model for precision thermal controls of an active hydrogen maser 

  McKelvy, James Andrew (University of Alabama Libraries, 2020)

  The active hydrogen maser atomic frequency standard is widely used in modern radio science astronautics research due to its outstanding short-term frequency stability. Short-term frequency stability is critical to radio ...
• Parametric study of an electric propulsion, nuclear thermal reactor, space vehicle system 

  Maddox, James Warren (University of Alabama Libraries, 2019)

  The feasibility of an electric propulsion, nuclear thermal rocket, in-space propulsion system was evaluated by considering both the full range of theoretical possibilities and the likely performance derived from empirical ...
• Additive manufacturing of two phase thermoplastic composites: a process model, microstructure and performance study 

  Papon, Md Easir Arafat (University of Alabama Libraries, 2019)

  Fused filament fabrication (FFF) based additive manufacturing (AM) of polymers and composites is a growing interest in processing tailorable parts with functional requirements like structural integrity, lightweight, ...
• Vibration control and gust alleviation of highly flexible blended-wing-body aircraft 

  Chiego, Peter (University of Alabama Libraries, 2019)

  Suppressing the excitation from gusts that flexible vehicles experience in high-altitude, long-endurance flights is critical to improving their flight performance and maintaining stable flight. Aircraft designed for ...
• Efficient algorithms for uncertainty quantification using polynomial chaos expansion and its applications to composite structures 

  Thapa, Mishal (University of Alabama Libraries, 2019)

  Uncertainty Quantification (UQ) deals with the study of variation in the response due to the presence of uncertainties in input parameters and governing models. Among the prevalent probabilistic techniques for UQ, non-intrusive ...
• Development and application of luminescent coatings for the measurement of pressure and strain 

  Chism, Kyle (University of Alabama Libraries, 2019)

  The development of improved imaging devices has continued to expand the application of more accurate and robust full-field optical measurement techniques in the areas of mechanics and aerodynamics. Two such full-field ...
• Multidimensional complex systems – transition distributions as a resilience measure 

  Shah, Shivank Kirit (University of Alabama Libraries, 2019)

  Complex networks can be observed in many areas ranging from ecological and biological to technical systems. Complex systems have many interacting components which make their dynamics non-linear. This makes it difficult to ...
• Small disturbance theory for hypersonic flow over slender bodies 

  Wuetcher, Andrew William (University of Alabama Libraries, 2019)

  Hypersonic flows involve high-enthalpy free-stream conditions. As a result, high temperature effects, which include internal energy excitations, energy relaxations, and chemical reactions, become important. Taking into ...
• Propeller whirl flutter analysis of the nasa all-electric X-57 through multibody dynamics simulations 

  Hoover, Christian (University of Alabama Libraries, 2018)

  With ridesharing companies researching into intracity air vehicles, aircraft efficiency has a significant impact on cost and resources. To increase efficiency, thinner and higher aspect ratio wings are used to reduce drag ...
• Modeling of nano-scale fracture mechanisms in a graphene sheet using the atomistic j-integral 

  Roy, Anubhav (University of Alabama Libraries, 2018)

  Researchers have performed studies with the addition and dispersion of a few weight percent of nanoscale particles in polymer matrices to mitigate the brittleness and microcracking of polymer matrices without incurring ...
• Development of an annular micro-Hall-effect thruster and Halbach permanent magnet arrays in Hall-effect thrusters 

  Warren, Matthew (University of Alabama Libraries, 2018)

  The research following began the initial steps in developing a micro-Hall-effect thruster for the use on a University of Alabama designed and built CubeSat. Additionally, the implementation of an asymmetric magnetic field ...
• Optimization and uncertainty quantification of multi-dimensional functionally graded plates 

  Hussein, Omar Shokry Ahmed (University of Alabama Libraries, 2018)

  Functionally graded structures (FGS) are structures that have varying properties in one or more directions that yield better performance over homogenous structures. The grading is usually considered through the thickness ...
• Optimum wing shaping and gust load alleviation of highly flexible aircraft with finite actuations 

  Hammerton, Jared (University of Alabama Libraries, 2018)

  The idea of improved flight performance is a constant goal within the aircraft design industry. In order to have aircraft which can fly further and for longer durations improved aerodynamic efficiency is required. Traditionally ...
• Carbon nanotube sheet scrolled fiber composite for enhanced interfacial mechanical properties 

  Kokkada Ravindranath, Pruthul (University of Alabama Libraries, 2017)

  The high tensile strength of Polymer Matrix Composites (PMC) is derived from the high tensile strength of the embedded carbon fibers. However, their compressive strength is significantly lower than their tensile strength, ...
• An experimental study of coherent structures in shock boundary layer interaction at Mach 3 

  Chaganti Subrahmanya Datta, Narendra (University of Alabama Libraries, 2017)

  The flow structure and unsteadiness of Shockwave-Boundary Layer Interaction (SWBLI) has been studied using Rainbow Schlieren Deflectometry (RSD), Ensemble Averaging, Fast Fourier Transform (FFT), snapshot Proper Orthogonal ...
• Biofidelic soft composites– experimental and computational modeling 

  Chanda, Arnab (University of Alabama Libraries, 2017)

  Biofidelic soft composites or tissues form the building blocks of the human body. Understanding the complex mechanics of these soft composites is the key to understanding the genesis and progression of disease. Biomechanically, ...
• Design and analysis of a carbon composite flap for the Cirrus SF50 jet aircraft 

  Haefner, Andrew (University of Alabama Libraries, 2017)

  A new carbon fiber composite flap was designed and analyzed for the Cirrus SF50. This new flap will replace the existing aluminum flap and has the potential to save 5.30 lbs per aircraft. The new flap has the same OML ...
• A study on axisymmetric cavities in supersonic flow 

  Brooker, Brian Tyler (University of Alabama Libraries, 2017)

  The research presented in this dissertation focuses on understanding and passively controlling the unsteadiness of the flow that occurs in cavity flows. Flow passing over a cavity generates turbulent structures that result ...

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