AE Theses and Dissertations
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Loss of control prediction system for the longitudinal and lateral dynamics of an aircraft using Laplace methods
(Wichita State University, 2018-07)Loss-of-control events have contributed to many accidents worldwide to this date. A signi cant amount of research has been done to provide safer ight conditions and thus prevent such events from occurring. One such ... -
Evaluation of a progressive damage model for a single lap-shear joint of multi-directional laminates
(Wichita State University, 2018-07)This document presents results from a numerical study of the progressive damage capabilities of the MAT162 material model in Ls-DYNA explicit finite element code. Single-shear fastener lap joint of multi-directional laminates ... -
A numerical representative volume element on the mesoscale for parts manufactured through fused deposition modeling and reinforced with short fibers
(Wichita State University, 2018-05)The analysis and certification of parts manufactured through Fused Deposition Modeling and reinforced with short fibers are the main drawback of the emerging technology. The present work builds a framework for the discrete ... -
Development of a fastener element in a lap joint with plates
(Wichita State University, 2018-05)The application of joints or other forms of connections are often seen in large assembled structures. When it comes to model joints in FEA software, engineers have some difficult decisions to make. Modeling joints using ... -
A three-dimensional numerical analysis of the effect of embedding cylindrical microwire sensors on the compressive strength of carbon-fiber reinforced composite laminates
(Wichita State University, 2017-12)The objective of this 3D finite element analysis study is to evaluate the effect on compressive strength of a laminated composite specimen, when cylindrical microwire tubes are embedded inside the structure. These microwire ... -
Characterization of tensile and compressive properties of single fiber filament of TOHO HTS 40 carbon fiber
(Wichita State University, 2017-12)In this work, the longitudinal tensile and compressive properties of TOHO HTS 40 carbon fiber filaments was characterized experimentally. The tensile strength and modulus were measured using a single filament tension tests ... -
Strength characterization of chopped-fiber composites using Iosipescu test method
(Wichita State University, 2017-12)In the aviation industry, composites are considered high-performance structural materials. Composite materials are mainly used in fuselages, wings, propellers, interior components, landing gears, doors, etc. Their main ... -
A numerical study on the triaxiality distribution in a single shear lap fastener joint
(Wichita State University, 2017-12)Fastened joints are used extensively in the aerospace industry and play an important role in defining the crashworthiness of the structure [1, 2]. As larger finite element models (FEM) are developed, joints are typically ... -
Numerical simulation of the leaflet designs to improve hemodynamics of mechanical heart valves
(Wichita State University, 2017-07)Mechanical heart valves (MHVs) are widely implanted due to their reliability and long life span. However, patients who receive MHV implants are required and prescribed anticoagulant medication to reduce the high risk of ... -
Design of an adaptive flight controller for a bird-like flapping wing aircraft
(Wichita State University, 2017-07)In the present age of increased demand for unmanned aerial vehicles, flapping wing unmanned aerial vehicle applications have become of interest, primarily because of their ability to fly silently and at lower speeds. This ... -
Adaptive control for fault tolerant autonomous launch and recovery
(Wichita State University, 2017-05)This work presents the use of adaptive control methodologies for the recovery to an aircraft carrier of an autonomous fixed wing aircraft. The control architecture used is model reference adaptive control that is implemented ... -
Nozzle geometry effects on exit orientation of short fiber composites
(Wichita State University, 2017-05)A problem in Fused Deposition Modeling (FDM) additive manufacturing processes with short carbon fiber filled suspensions is that the resulting part does not have isotropic properties. Nozzles used during processing tend ... -
Modeling and control of a flapping wing micro air vehicle at hover condition
(Wichita State University, 2016-07)In this thesis a mathematical model of a flapping wing MAV is discussed. Aerodynamic forces and moments due to some key unsteady aerodynamic mechanisms are studied to derive the vehicle's longitudinal equations of motion ... -
Effect of embedding cylindrical microwire sensor tubes on the in-plane compressive strength of carbon-fiber reinforced polymer composite laminates
(Wichita State University, 2016-08)The influence of embedding a titanium alloy sensor tube in carbon fiber-reinforced polymer (CFRP) composite laminates on the in-plane compressive strength has been presented. These sensor tubes cause geometric disturbances ... -
Evaluation of tabbed composite specimens for material characterization under medium loading rates: a numerical study
(Wichita State University, 2016-08)Compression failure of laminated composites is a very complex mechanism involving one or more failure modes especially under high loading rates. Tabbed specimens per ASTM D695 / SACMA SRM 1R-94 are used to measure compressive ... -
Blind detection designs with unique identification in two-way relay channels
(Wichita State University, 2016-07)In amplify-and-forward (AF) two-way relay networks, information is exchanged be-tween two source nodes via a relay node by AF relaying. This dissertation develops the blind detection designs for various two-way relay systems ... -
Cell association attack via reference signal spoofing in multi-cell wireless networks
(Wichita State University, 2016-07)The research in this dissertation involved investigating a novel physical-layer security problem wherein malicious base stations (MBSs) mislead mobile terminals (MTs) into being prematurely handed over to suboptimal target ... -
Decentralized control of interconnected singularly perturbed systems
(Wichita State University, 2016-08)Designing a controller for large scale systems usually involve a high degree of complexity and computation ability. When talking about decentralized interconnected systems, the complexity and computation are not the only ... -
Effect of embedding cylindrical sensor tube on fatigue life of carbon/epoxy cross-ply composite laminate
(Wichita State University, 2016-05)In this study the effect of embedded sensor tube on fatigue life of composite structure under compression fatigue has been determined. Specimens were prepared using carbon/epoxy prepregs stacked in [(90/0/90)3 90/0]s with ... -
Computational methodology for electro-thermal ice protection system analysis
(Wichita State University, 2016-05)The new trend in aviation industry is towards „all electric aircraft‟. Thus, there‟s a strong desire to replace bleed air systems with efficient electrical ice protection systems that would provide adequate ice protection. In ...
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