Aeronautics and astronautics
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Experimental and Numerical Investigation Into the Impact of Aging, Flow, and Scaling on Discontinuous Fiber Composite and Hybrid Structures
Discontinuous fiber composites (DFCs) have garnered the interest of many industries due to their manufacturing capabilities, and potential for recycling of thermoset prepregs. DFCs are manufactured by chopping conventional ... -
FastDM4C: A Fast and Efficient Discrete Model for Composites
The adoption of composite materials in the aerospace industry has enabled the achievement of structural performance levels and weight savings unimaginable even just twenty years ago. Yet, only a fraction of the true potential ... -
Experimental Investigation of Mode II Fatigue and Size Effect in Unidirectional Carbon/Epoxy Composite Beams
This paper investigates mode II quasibrittle behavior and fatigue characteristics within laminated composite structures and examines these through the lens of size effect. The primary focus of this study is mode II ... -
Investigation of Structures Featuring Curvilinear Anisotropy: Application to Electrostatic Problem and Mechanical Response
This study examines the impact of curvilinear reinforcement in a composite structure. The key areas covered include two main applications: 1) enhancing functional properties in electrostatic problems and 2) improving the ... -
Scalable Coordination of Intelligent Vehicles in Shared Markovian Dynamics
Driven by the growing demand for mobility and connectivity, future aerospace-based transportation systems necessitate efficient coordination of not just one, or two, but a population of intelligent vehicles that execute ... -
Impact of Dissociation on Modeling for Plasma Aerocapture
Interplanetary missions require changes in velocity to travel along planned trajectories, make course corrections, and for planetary capture. When performed using traditional propulsive methods, the mass and monetary costs ... -
Constrained Policy Synthesis: Riemannian Flows, Online Regulation, and Distributed Games
This dissertation makes contributions to decision-making processes in both cooperative and non-cooperative environments, spanning several domains from constrained and large- scale dynamical systems to network games and ... -
Two-Chord Digital Holographic Interferometry on Sheared-Flow-Stabilized Z-Pinch Plasma
A two-chord digital holographic interferometry (DHI) setup is implemented on the ZaP-HD sheared-flow-stabilized (SFS) Z-pinch device. The SFS Z-pinch concept can potentially work as a fusion power generator or a space ... -
Comprehensive Investigation of Quasibrittle Fracture of IM7/977-3 Laminates via Size Effect Analysis
This thesis investigates the non-linear size effect of fracture of IM7/977-3 laminates with different sizes in multiple modes including the matrix-dominated Mode I intralaminar fracture, the fiber-dominated Mode I intralaminar ... -
Rain Erosion: From Multi-physics Modelling to Efficient and Cost-effective Qualification
This thesis explores the structural implications of the rain erosion of thin film coatings onexterior aircraft surfaces through the lenses of testing and finite element modelling (FEM). Currently, there is no accurate ... -
Electrode Geometry Effects on Plume Characteristics and Thruster Performance of ZaP-HD
The addition of sheared-flow stabilization (SFS) to a Z-pinch configuration has allowed increased stability and plasma lifetime. This shows great promise for use as a compact, linear,fusion device and as a future deep space ... -
Investigation of Pre-Ignition Propellant Mixing in Rotating Detonation Rocket Engine
Pre-ignition propellant mixing was simulated using computational fluid dynamics in various rotating detonation rocket engine (RDRE) configurations. Two different RDREs were used for the simulations, a 25.4 mm diameter RDRE ... -
Geometric Scaling of Cylindrical Rotating Detonation Rocket Engine Combustors
A Rotating Detonation Rocket Engine (RDRE) is a propulsion device employing detonation waves moving circumferentially around an annular channel to consume axially-fed propellants. Theoretically, this device provides benefits ... -
Characterization and Modeling of Spatiotemporal Behaviors in Corals, Elastic Metamaterials and Origami
Spatiotemporal behaviors have been widely found in natural and artificial systems, indicating the movement and dynamics that occur in both space and time. These behaviors have significant impact on numerous fields, including ... -
Numerical Modelling of LOX Droplet Combustion in Hydrogen under Micro-gravity Conditions
One of the most frequent liquid rocket propellant configurations is LOX/LH2. Specifically,since this fuel/oxidizer mixture produces an extremely high specific impulse (Isp) with only water vapor as an exhaust. This makes ... -
Influence of nozzle exhaust angle on supersonic retro propulsion
Over the past few decades, humanity has been working to land astronauts on Martiansoil. Several candidate technologies and ideas are being developed around the world to counter the challenges posed by the Entry Descent ... -
Influence of Projectile Geometry on Baffled Tube Ram Accelerators
The ram accelerator is a hypervelocity mass driver that operates on a principle similar to that of a ramjet in tube. It is capable of accelerating projectiles to velocities in excess of 2.6 km/s and has applications in ... -
Investigation of Baffled Shock Tubes for Low Velocity Ram Accelerator Start
The ram accelerator is a hypervelocity launcher in which a projectile is injected into stationary tubes filled with premixed fuel and oxidizer. Combustion is initiated as the projectile passes, creating a high pressure ... -
Implementation of a 3D-PTV System for Interrogating Turbulent Boundary Layer Development Post Reattachment of a Backward-Facing Step Flow
In this study, the turbulence behavior post reattachment of a backward-facing step flow, typically within the initial redeveloping boundary layer was present. An experimental technique, 3D particle tracking velocimetry ... -
The Impact of Planar-Geometry Cathodes on Hall Thruster Performance
This thesis explores the viability of planar cathodes for improving Hall thruster performance. A mathematical model is presented that calculates how the total efficiency of a Hall thruster changes when operated with a ...
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