Mechanical Engineering Commons^™

Performance Of A Gravity Independent Heat Pipe, O Y W Abotsi, K Kaddoura, J P. Kizito

Early Career Technical Journal (ECTJ)

Section 1: Thermal Sciences; pp. 3-10

Section 4: Materials, Ectc Coordinating Committee

Early Career Technical Journal (ECTJ)

Proceedings of the 18th Annual Early Career Technical Conference, November 3, 2018. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 91-117

Section 5: Mechanics, Ectc Coordinating Committee

Early Career Technical Journal (ECTJ)

Proceedings of the 18th Annual Early Career Technical Conference, November 3, 2018. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 118-149

Cooling Of A Hot Substrate With Supersonic Nozzle, Rafit Kabir, Simon Esau, John Kizito

Early Career Technical Journal (ECTJ)

Section 1: Thermal Sciences; pp. 11-17

Proceedings Of The 18th Annual Early Career Technical Conference (Complete Issue), Ectc Coordinating Committee

Early Career Technical Journal (ECTJ)

Proceedings of the 18th Annual Early Career Technical Conference, November 3, 2018. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama

A Method For The Design Of Thermodynamic Optimized Scramjet Configurations, Dehua Feng, Frederick Ferguson, Mookesh Dhanasar, Julio Cesar Mendez

Early Career Technical Journal (ECTJ)

Section 1: Thermal Sciences; pp. 18-26

Simulating The Effects Of Turbulence On Pressure Tap Measurements, Jose Corona, John Kizito, Louis C. Chow, Quinn H. Leland

Early Career Technical Journal (ECTJ)

Section 2: Numerical Methods; pp. 35-42

A Revised Analysis Of The Compressible Boundary Layer At High Reynolds Numbers And At Mach 0.5, Tasmin Hossain, Yang Gao, Julio Cesar Mendez, Frederick Ferguson

Early Career Technical Journal (ECTJ)

Section 2: Numerical Methods; pp. 52-62

An Open Cycle Thermodynamic Simulation Quantifying Benefits Of Turbocompounding In Dual Fuel Combustion, Adithya Baburaj, Abhinandhan Narayanan, Sundar Rajan Krishnan, Kalyan Kumar Srinivasan

Early Career Technical Journal (ECTJ)

Section 2: Numerical Methods; pp. 63-70

Model Development To Assess Drug Delivery To Brain Tumors, Lisa Antoine, Roy Koomullil, Timothy M. Wick, Mohamed M. Selim

Early Career Technical Journal (ECTJ)

Section 3: Miscellaneous; pp. 73-79

Fruit Ripeness Estimation For Avocado Using Thermal Imaging, Sathish Kumar Gurupatham, Erhan Ilksoy, Nick Jacob, Kevin Van Der Horn

Early Career Technical Journal (ECTJ)

Section 3: Miscellaneous; p. 80

Automated Image Acquisition For Vehicle Inspection, Hannah Evans, Kevin Mcfall

Early Career Technical Journal (ECTJ)

Section 3: Miscellaneous; pp. 81-85

Structural Performance Of Wood-Based Bio-Composites Under Four-Point Bending, Maharshi Dave, Tejas Pandya, Jason Street

Early Career Technical Journal (ECTJ)

Section 4: Materials; pp. 93-96

An Improved Method For Fragment Detection In Eulerian Hydrocodes, Kenneth Walls, David Littlefield

Early Career Technical Journal (ECTJ)

Section 4: Materials; pp. 97-102

Dynamic Compressive Behavior And Energy Absorption Of Ddgs-Paulownia Wood Composite Using Shpb, Suman Babu Ukyam, Damian Stoddard, Brent Tisserat

Early Career Technical Journal (ECTJ)

Section 4: Materials; p. 103

Impact Behavior Of Microcrystalline Cellulose And Corn Starch Based Wood Bio-Composites Under High Strain Rate Compressive Loading, Maharshi Dave, Tejas Pandya, Jason Street

Early Career Technical Journal (ECTJ)

Section 4: Materials; pp. 112-117

Compliant Mechanism Designs And Analysis, Hunter Kyle Horner, Hongkuan Lin, Sergi Franco Canchola, Michael Weitzel, Cody Delarosa, Ayse Tekes

Early Career Technical Journal (ECTJ)

Section 5: Mechanics; pp. 120-125

Mathematical Modelling Of A Fully Electric Vehicle With Four Inwheel Motors, Siyuan Zhang, Vladimir Vansevich

Early Career Technical Journal (ECTJ)

Section 5: Mechanics; pp. 126-129

Preliminary Thermal And Stress Analysis Of An Electrical Connection Acting As A Thermal Dam On A Nitinol Wire, Lloyd Donovan Balfour, Douglas Ross

Early Career Technical Journal (ECTJ)

Section 5: Mechanics; pp. 130-136

Lab Equipment Design For Undergraduate Machine Dynamics And Vibrations Courses, Michael Weitzel, Zach Marr, Julia Ortiz, Drew Farmer, Zikora Agbapu, Hunter Merrigan, Ayse Tekes

Early Career Technical Journal (ECTJ)

Section 5: Mechanics; pp. 137-141

Diginol: A Joule-Heated Binary-Partitioned Nitinol Actuator Design And Testing Methodology, Martin Dawson Holland, Douglas H. Ross

Early Career Technical Journal (ECTJ)

Section 5: Mechanics; pp. 142-149

An Integrated Microstructural-Nanomechanical-Chemical Approach To Examine Material-Specific Characteristics Of Cementitious Interphase Regions, Mahdieh Khedmati, Yong-Rak Kim, Joesph A. Turner, Hani Alanazi, Charles Nguyen

Department of Mechanical and Materials Engineering: Faculty Publications

Effective properties and structural performance of cementitious mixtures are substantially governed by the quality of the interphase region because it acts as a bridge transferring forces between aggregates and a binding matrix and is generally susceptible to damage. As alternative binding agents like alkali-activated precursors have obtained substantial attention in recent years, there is a growing need for fundamental knowledge to uncover interphase formation mechanisms. In this paper, two different types of binding materials, i.e., fly ash-based geopolymer and ordinary portland cement, were mixed with limestone aggregate to examine and compare the microstructures and nanomechanical properties of interphase region. To …

Neuroprotective And Anti-Inflammatory Effects Of Rhus Coriaria Extract In A Mouse Model Of Ischemic Optic Neuropathy, Saba Khalilpour, Ghazaleh Behnammanesh, Fouad Suede, Mohammed O. Ezzat, Jayadhisan Muniandy, Yasser Tabana, Mohamed B. K. Ahamed, Ali Tamayol, Amin Malik Shah Majid, Enrico Sangiovanni, Mario Dell'agli, Aman Shah Majid

Department of Mechanical and Materials Engineering: Faculty Publications

Modulating oxidative stresses and inflammation can potentially prevent or alleviate the pathological conditions of diseases associated with the nervous system, including ischemic optic neuropathy. In this study we evaluated the anti-neuroinflammatory and neuroprotective activities of Rhus coriaria (R. coriaria) extract in vivo. The half maximal inhibitory concentration (IC₅₀) for DPPH, ABTS and B-carotene were 6.79 ± 0.009 µg/mL, 10.94 ± 0.09 µg/mL, and 6.25 ± 0.06 µg/mL, respectively. Retinal ischemia was induced by optic nerve crush injury in albino Balb/c mice. The anti-inflammatory activity of ethanolic extract of R. coriaria (ERC) and linoleic acid (LA) on …

Molecular Doping Enabled Scalable Blading Of Efficient Hole-Transport-Layer-Free Perovskite Solar Cells, Wu-Qiang Wu, Qi Wang, Yanjun Fang, Yuchuan Shao, Shi Tang, Yehao Deng, Haidong Lu, Ye Liu, Tao Li, Zhibin Yang, Alexei Gruverman, Jinsong Huang

Department of Mechanical and Materials Engineering: Faculty Publications

The efficiencies of perovskite solar cells (PSCs) are now reaching such consistently high levels that scalable manufacturing at low cost is becoming critical. However, this remains challenging due to the expensive hole-transporting materials usually employed, and difficulties associated with the scalable deposition of other functional layers. By simplifying the device architecture, hole-transport-layer-free PSCs with improved photovoltaic performance are fabricated via a scalable doctor-blading process. Molecular doping of halide perovskite films improved the conductivity of the films and their electronic contact with the conductive substrate, resulting in a reduced series resistance. It facilitates the extraction of photoexcited holes from perovskite directly …

Ambiqual – A Full Reference Objective Quality Metric For Ambisonic Spatial Audio, Miroslaw Narbutt, Andrew Allen, Jan Skoglund, Michael Chinen, Andrew Hines

Conference papers

Streaming spatial audio over networks requires efficient encoding techniques that compress the raw audio content without compromising quality of experience. Streaming service providers such as YouTube need a perceptually relevant objective audio quality metric to monitor users’ perceived quality and spatial localization accuracy. In this paper we introduce a full reference objective spatial audio quality metric, AMBIQUAL, which assesses both Listening Quality and Localization Accuracy. In our solution both metrics are derived directly from the B-format Ambisonic audio. The metric extends and adapts the algorithm used in ViSQOLAudio, a full reference objective metric designed for assessing speech and audio quality. …

Human Powered Vehicle Frame Design, Analysis, Manufacturing, And Testing, Christopher Reed, Kole W. Williams

Williams Honors College, Honors Research Projects

The University of Akron Human Powered Vehicle Design Team began this academic year with a mission to create a practical, lightweight, safe, and efficient human powered vehicle. The main objectives of ZC18 were inspired by competition in the 2018 Human Powered Vehicle Challenge at ASME E-Fest East. In addition to adhering to the rules of this competition, scoring high on the submitted reports, and competing well in the racing events, the team set a goal to assist in furthering knowledge related to the topic of human powered vehicles.

ZC18 was constructed nearly completely in the University of Akron’s Design Center …

Swagelok Adjustable Check Valve Setting Device, Brandon Sours, Paul Olson, David Race, Nick Rimpf

Williams Honors College, Honors Research Projects

Check valves are used to control the amount of flow through a valve and only open when a certain pressure is reached. The path of the fluid is strictly in one direction, which allows the valve to prevent any back flow within a system. They are also one of few self-automated piping system components that do not require assistance to open or close. Some check valves use a combination spring-and-nut compression assembly to set an opening pressure. As the nut is used to set the spring compression, and by extension the opening pressure, problems tend to arise when adjusting the …

Design Of Shape-Conforming Nosecone For Optimal Fluid Flow From Transonic To Supersonic Range, Anna Tombazzi

Williams Honors College, Honors Research Projects

Modern flight vehicles, such as rockets, missiles, and airplanes, experience a force caused by forebody wave drag during the flight. This drag force is induced when the frontal point of each vehicle breaks the pressure wave during flight. Efforts to reduce this wave drag force to improve flight efficiency include modifying the nosecone profile of the flight vehicles to lower the drag force.

This project revolved around creating a design to make the transformation of nosecone shapes from a ¾ Parabolic profile to a ½ Power Series profile possible, mid-flight. Using a novel nosecone assembly, shape memory alloys (SMAs) and …

Galvanic And Pitting Corrosion Of A Fastener Assembly, Julie Shallman

Williams Honors College, Honors Research Projects

This research focuses on coupled galvanic/pitting corrosion of AA7075 when combined with stainless steel in a fastener assembly. A one-dimensional mathematical model of a well-mixed thin film electrolyte is developed to predict the damage profile of the AA7075 surface when its protective coating is damaged. The damage exposes the galvanic couple. A time dependent system of partial differential equations for potential, chloride concentration, aluminum ion concentration, and damage is developed and solved numerically. Two approaches to calculate the current density within aluminum pits are discussed. The first is a current balance between the cathodic, anodic and passive portions of the …

Dynamic Mechanical Analysis Piezoelectric Design, Letia Bass, Michaela N. Mccrae, Ethan W. Goodman, Joesph W. Mazur

Williams Honors College, Honors Research Projects

This project is a continuation into the design and implementation of a Dynamic Mechanical Analysis (DMA) device that will be used to conduct high frequency testing on tire tread compounds. The design requirements necessary were to design a device that will produce a target frequency of 10 kHz with a 0.05% strain, while being at room temperature. The 3-D model developed by the previous year’s students was improved upon and new parts were designed as well. The assemblies (most importantly the connector piece) were 3-D modeled using Creo Parametric and analyzed with COMSOL Multiphysics. A new design involving flexures was …