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Assessment of Native Aortic Stenosis Hemodynamics and Clinical Evaluation Methods Using Steady State Computational Fluid Dynamics and Computed Tomography-Derived Geometry
(North Dakota State University, 2012)
Aortic stenosis is the most common valvular heart disease with a prevalence of 2% among individuals over 65 years and 4% over 80, in developed countries. Accurate valve assessment for intervention timing is critical. Using ...
Impact of Recycling on the Mechanical and Thermo-Mechanical Properties of Wood Flour/High Density Polyethylene and Wood Flour/Poly Lactic Acid Composites
(North Dakota State University, 2016)
This research concentrates on the recyclability of two wood plastic composites (WPCs) - wood flour/HDPE and wood flour/PLA composites. Two different filler loadings (30 and 50 wt%) were considered for each polymer composite. ...
Production of Cellulose Nanofibers using Midwest Biomass and their High-Performance Rubber Nanocomposites
(North Dakota State University, 2018)
Cellulose nanofibers (CNFs) are a sustainable and environmentally friendly material which can be used as a highly versatile reinforcing agent in polymer nanocomposites. This thesis presents a novel method to produce CNFs ...
An Experimental Study on a Density Driven Solar Water Heating System Using Supercritical CO2 as Working Fluid
(North Dakota State University, 2013)
For supercritical carbon dioxide, a small change in temperature or pressure can result in large change in density, especially close to its critical point. At this pseudocritical region, density decreases rapidly with ...
Influence of the Biaxiality Ratio on Multiaxial Fatigue of Metallic Materials
(North Dakota State University, 2014)
The ability to model and predict multiaxial fatigue life without being too aggressive or conservative is of great interest to engineers. The purpose of this study was to examine the influence of the biaxiality ratio (σ2/σ1) ...
Theoretical and Computational Studies of the Mechanical Strength and Fracture Toughness of Adhesively Bonded Joints and Polymer Nanoclay Composites
(North Dakota State University, 2019)
Increasing use of adhesively bonded joints (ABJs) and polymer nanoclay composites (PNCs) in modern vehicles and other industrial sectors has deeply shaped the design and manufacturing of advanced materials and structures ...
Experimental Investigation of Molten Salt Torrefaction and the Development of a Lab-Scale Torrefaction Methodology
(North Dakota State University, 2019)
A novel torrefaction methodology using molten salts as a means to reduce torrefaction temperatures was investigated. A lab-scale molten salt torrefaction methodology was developed to consistently torrify biomass; involving ...
Numerical Studies of Droplet Behavior in a Steady Non-Uniform Electric Field
(North Dakota State University, 2013)
An initially uncharged droplet suspended in another immiscible fluid under the influence
of a steady non-uniform electric field may experience deformation, migration and bursting.
This work numerically investigated the ...
Mechanical and Surface Properties of Technical and Single Flax Fiber in Micro and Nano Scale
(North Dakota State University, 2017)
The continued search for sustainable and eco-friendly materials led to the integration of bio-fibers as the reinforcement in composite materials. However, a wide variation in their mechanical properties poses a considerable ...
Fine Line Metallization of Silicon Heterojunction Solar Cells via Collimated Aerosol Beam Direct Write
(North Dakota State University, 2012)
Solar energy has come to the forefront as a scalable and largely underutilized renewable energy resource. The current cost of solar electricity, namely from photovoltaics, along with other logistics factors, has prevented ...