Mechanical and Aerospace Engineering electronic theses and dissertations (MU): Recent submissions
Now showing items 1-20 of 364
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Analytical methods for the pyramidal truss metamaterial
(University of Missouri--Columbia, 2023)Mechanical metamaterials are a subclass of metamaterials which exhibit exotic effective mechanical proper- ties. These may include a negative bulk modulus, a negative Poisson's ratio, or a negative mass density. Subse- ... -
A direct approach for computationally efficient low-thrust trajectory optimization
(University of Missouri--Columbia, 2023)This study uses a direct optimization technique to find optimized low-thrust trajectories for spacecraft that minimize fuel consumption. By using analytic orbital averaging, a spacecraft's equations of motion are simplified ... -
Investigation of oxidation mechanisms for aluminum micro- and nanoparticles of various geometries via nanosecond laser irradiation
(University of Missouri--Columbia, 2023)Aluminum micro- and nanoparticles have garnered interest from researchers as solid-state fuel in heterogenous energetic composites due to their high energy density, low cost, and general abundance. To react, aluminum ... -
3D growth simulation and field emission properties of vertically aligned carbon nanotubes
(University of Missouri--Columbia, 2023)[EMBARGOED UNTIL 12/1/2024] Since their discovery, carbon nanotubes (CNTs) have become a widely researched and utilized nanomaterial due to their nanoscale size and unique electrical, thermal, and mechanical properties. ... -
Lippmann's legacy : the evolution of electrowetting and its impact on wettability
(University of Missouri--Columbia, 2023)In this dissertation, we venture beyond the traditional frameworks of electrowetting to establish a systematized approach to understanding and manipulating fluid surfaces under the influence of electrical forces. Our primary ... -
Strengthening dental amalgams
(University of Missouri--Columbia, 1974)"For over 100 years dental restorations have been produced from an alloy containing mercury, silver, tin, and other components in lesser amounts. Early research done by such men as Townsend and Flagg in the last half of ... -
Modeling and optimization of anaerobic swine waste digestion systems
(University of Missouri--Columbia, 1985)Mathematical models of the digestion process, an anaerobic digestion system, and an economic analysis of a digestion system were developed. The goal was to accurately simulate the performance of a facility producing less ... -
Reduction of shaking forces in a slider crank mechanism
(University of Missouri--Columbia, 1970)The object of this study was to determine the periodic angular speed of the crankshaft of a slider crank mechanism which will minimize the shaking forces and torque of the mechanism on the block. Both the inertial shaking ... -
Effects of constraint variation on the fatigue growth of surface flaws
(University of Missouri--Columbia, 1985)Studies have shown that fatigue growth of semielliptic surface flaws in plates is not adequately predicted solely by stress intensity factor analysis. The variation in stress field triaxiality along the flaw border must ... -
A holographic interferometry study of an axisymmetric shock-wave/boundary-layer strong interaction flow
(University of Missouri--Columbia, 1986)An experimental study of the axisymmetric shock-wave/ turbulent boundary-layer strong-interaction flow generated in the vicinity of a cylinder-cone intersection has been conducted. The present data are useful in the ... -
Stability and vibration characteristics of skew plates
(University of Missouri--Columbia, 1971)"Review of Literature. The deflection, stability, and vibration characteristics of rectangular plates have received considerable treatment in the literature. Solutions to the bending of rectangular plates with various ... -
Development of a multiple-specimen, reversed-flexure fatigue tester and its application to the testing of titanium sheet
(University of Missouri--Columbia, 1971)"Advancing technology constantly increases the demands on existing engineering materials. These demands are extremely severe for aerospace materials where the necessity for a higher strength-to-weight ratio is complicated ... -
An optical lateral control system for vehicles
(University of Missouri--Columbia, 1971)"It is evident that we will need a new mode of highway transportation within the next fifteen years. There are already 103 million vehicles (cars, trucks, and buses) on our roads; the majority of which are concentrated in ... -
Program for optimization of experimental data within a constrained configuration
(University of Missouri--Columbia, 1975)"The purpose of this thesis is to discuss and evaluate the development of a computer program for the optimization of a variable within a constrained situation. The objective of the program is to determine what combination ... -
An analysis of the induction time in the acetylene oxygen reaction
(University of Missouri--Columbia, 1971)"The importance of hydrocarbon combustion in flames and explosions of gases has long been recognized and hence continues to attract intensive investigation. Even though many new results are presented each year the proposed ... -
Investigation of the pressure-flow relationships of blood in the mammalian kidney
(University of Missouri--Columbia, 1970)This dissertation deals with the problem of quantification of the properties and activities of living tissue in the peripheral vasculature. The method of quantification is lumped hydraulic impedance analysis. The object ... -
A research tool for the chronic depulsation of the systemic circulatory system
(University of Missouri--Columbia, 1971)This research presents the development of a depulsation system for the chronic depulsation of the systemic circulations of a research animal. The system is designed so the animal may be alert and unrestrained while the ... -
Measurements and analyses of nasal and oral airflow during isolated sound productions by normal and cleft palate speakers
(University of Missouri--Columbia, 1971)Speech sound is produced through the superimposition of a coordinated series of progressive and dynamic processes. These processes include respiration, phonation, resonance, and articulation and are accomplished by making ... -
A study of parametric instability of eccentrically stiffened rectangular plates
(University of Missouri--Columbia, 1974)The purpose of the investigation was to determine the onset of parametric instability for a simply-supported rectangular stiffened plate subjected to periodic in-plane loads. The static buckling and the free vibration of ... -
Theory of flexure of orthotropic multi-layer circular sandwich plates
(University of Missouri--Columbia, 1968)The theory of flexure of multi-layer orthotropic circular sandwich plates is obtained by extremizing the augmented complementary energy. The complementary energy is the sum of the strain energies of the individual layers ...