Browsing Mechanical Engineering & Applied Mechanics Doctoral Work by Title
Now showing items 7-26 of 28
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Dynamic Stall Characteristics of Pitching Finite-Aspect-Ratio Wings
(North Dakota State University, 2021)In this study, an experimental investigation was performed to characterize the dynamic stall of pitching wings and provide confirmation of the existence of the arch-shaped vortex for moderate sweep wing. Dynamic stall is ... -
Dynamical Modelling of an Idealized Hemispherical Skull Model with Fluid Pressure Interactions Using Modal Analysis
(North Dakota State University, 2019)In this dissertation, a non-invasive intracranial pressure (ICP) monitoring technique is introduced by developing a head dynamic model. The technique is based on modal frequency testing and vibration responses analysis of ... -
The Effects of Surface Roughness on the Functionality of Titanium Based Alloy Ti13Zb13Zr Orthopedic Implants
(North Dakota State University, 2021)In this study, the effects of surface roughness on the wettability, cell attachment, and mechanical properties of titanium-based Ti13Nb13Zr orthopedic implants have been investigated. The aim of this multidisciplinary ... -
Examination of the Impact of Helmets on the Level of Transferred Loads to the Head Under Ballistic and Blast Loads
(North Dakota State University, 2015)The main causes of human Traumatic Brain Injuries (TBIs) in war zones are ballistic impacts and blast waves. While understanding the mechanism of TBI and the brain injury thresholds are in urgent needs, efficiency of helmets ... -
Experimental and Micromechanical Analysis of Flax and Glass Reinforced Bio-Based Composites
(North Dakota State University, 2015)Two different novel high-functional bio-based resins from Methoxylated Sucrose Soyate Polyol (MSSP) and methacrylated epoxidized sucrose soyate (MAESS) were used as matrices for composites. Vinyl ester reinforced with flax ... -
Experimental and Theoretical Studies of Nanostructured Electrodes for Use in Dye-Sensitized Solar Cells
(North Dakota State University, 2017)Among various photovoltaic technologies available in the emerging market, dye-sensitized solar cells (DSSCs) are deemed as an effective, competitive solution to the increasing demand for high-efficiency PV devices. To ... -
Experimental Studies of Pulsatile Flow Characteristics of Aortic Models under Normal and Diseased Conditions
(North Dakota State University, 2021)Heart disease is the leading cause of death globally. Aorta is extremely important because of its critical function in blood circulation. Abnormal hemodynamics of aortic valve and arch is related to many severe diseases ... -
Flow Accelerated Organic Coating Degradation
(North Dakota State University, 2014)Applying organic coatings is a common and the most cost effective way to protect metallic objects and structures from corrosion. Water entry into coating-metal interface is usually the main cause for the deterioration of ... -
Fluid Dynamics of Material Micro-Deposition: Capillary-Based Droplet Deposition and Aerosol-Based Direct-Write
(North Dakota State University, 2012)With rapid development of the direct-write technology, in addition to requirement of non-destructive printing, there is a need for non-expensive, robust, and simplified techniques of micro/nano fabrication. This dissertation ... -
Fluid Mechanics of Micro Cold Spray Direct Write Process
(North Dakota State University, 2012)Cold spray, also known as the gas dynamic spray process, was first discovered in the 1980s while doing high speed two phase wind tunnel experiments. The principle underlying this process is that if a metal particle is ... -
High-Performance Simulations for Atmospheric Pressure Plasma Reactor
(North Dakota State University, 2012)Plasma-assisted processing and deposition of materials is an important component of modern industrial applications, with plasma reactors sharing 30% to 40% of manufacturing steps in microelectronics production [1]. Development ... -
Improving Performance Characteristics of Poly (Lactic Acid) (PLA) Based Nanocomposites by Enhanced Dispersion of Modified Cellulose Nanocrystals (CNCs)
(North Dakota State University, 2018)Poly(lactic acid), (PLA) is a biodegradable and biocompatible polymer which has attracted significant attention as a promising substitute for petroleum-based polymers. To optimize the usage of PLA in a wide range of ... -
Influences of Seawater Flows on the Degradation of Organic Coatings Applied on Offshore Wind Turbines
(North Dakota State University, 2022)The regular protection methods of offshore wind structures consist of the application of two or three layers of epoxy-based coatings with a polyurethane topcoat. The coating systems of offshore wind turbines are mostly ... -
Light-assisted 3D printing of continuous carbon fiber reinforced thermoset composites
(North Dakota State University, 2024)Polymer 3D printing has become an emerging manufacturing technique, due to its design flexibility, however its application to produce structural components is still limited due to the poor mechanical strength and thermal ... -
Mechanical and Tribological Properties of Carbon Nanofiber Reinforced High Density Polyethylene
(North Dakota State University, 2014)High density polyethylene (HDPE) is widely used as a bearing material in industrial application because of its low friction and high wear resistance. Reinforcing polymers with the appropriate nanofillers is an effective ... -
Mechanical Characterization and Constitutive Modeling of Rate-dependent Viscoelastic Brain Tissue under High Rate Loadings
(North Dakota State University, 2019)In this dissertation, theoretical, computational, and experimental methodologies are introduced to determine the rate-dependent material properties of the brain tissue. Experiments have shown that the brain tissue is ... -
Mechanics of Surface Instabilities of Soft Nanofibers and Nonlinear Contacts of Hydrogels
(North Dakota State University, 2020)The research of this dissertation is formulated in two fields, i.e., the theoretical and computational studies of circumferential wrinkling on soft nanofibers and the swelling mechanics study of a bi-layered spherical ... -
Microwave Torrefaction of Natural Fibers for Incorporation into Engineering Thermoplastic Biocomposites
(North Dakota State University, 2015)Little work has been done in the area of engineering thermoplastic biocomposites due to the increased processing temperatures which induce degradation of biomass. Torrefaction has been identified as an effective means of ... -
Nonlinear Fatigue Damage Accumulation in Aircraft Engine Alloys Multiaxial Loading
(North Dakota State University, 2013)Fatigue is considered to be one of the most frequent phenomena in the failure of many machine parts. Most of the prior studies on fatigue have been limited to uniaxial loading cases with a primary focus on constant ... -
Optimized Evaluation of Bone Tissue Material Properties by Inverse Finite Element Analysis and Femur Fracture Testing
(North Dakota State University, 2015)The main objective of this research is to characterize bone inhomogeneous elastic, yield, and post-yield behaviors, using a computational-experimental approach. The current study uses the force-displacement results of one ...