AE Theses and Dissertations
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Cure dependent thermal conductivity of carbon fiber/epoxy composite - experiments and analysis
(Wichita State University, 2018-12)Knowledge of thermal conductivity of fiber reinforced composites is important to understand the thermal gradients and heat build-up during cure. Thermal conductivity of composite materials depends on temperature, direction ... -
Aircraft system identification using the pixhawk mini controller for academic use
(Wichita State University, 2018-12)This paper summarizes the use of a small, low cost, versatile, easy-to-program, and off-the-shelf autopilot system, called the Pixhawk Mini, to fly and validate a student-built RC aircraft in the aerospace engineering ... -
Sub 750-watt electric propulsion dynamometer
(Wichita State University, 2018-12)The recent surge in popularity of small electric UAVs under 2kg (4 lbs.) has exposed a need for reliable electric motor performance data. With these UAVs using propulsion systems below 750 W, the systems designed to test ... -
Elastic wave propagation through 3-dimensional cubic lattice structures
(Wichita State University, 2018-12)In this study, the elastic wave propagation in 3-dimensional periodic lattice structure was investigated. The investigation was performed on the three cubic lattice structures (Simple Cubic, Body Centered Cubic, and Face ... -
Optimal orbit-raising and attitude control of all-electric satellites
(Wichita State University, 2018-12)Electric propulsion is gaining popularity among satellite operators due to its fuel e ciency. However, electric propulsion has the limitation of producing a small magnitude of thrust, meaning that the transfer time to ... -
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 ...
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