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Articles 151 - 180 of 593
Full-Text Articles in Mechanical Engineering
Structural Design Of A New Crash Cushion, Kent Walls, Kevin Schrum
Structural Design Of A New Crash Cushion, Kent Walls, Kevin Schrum
Early Career Technical Journal (ECTJ)
Section 4: Sustainability & Design; pp. 88-95
Flexural Performance Of Microcrystalline Cellulose Based Wood Composite Under Four- Point Bending, Maharshi Dave, Tejas Pandya, Jason Street
Flexural Performance Of Microcrystalline Cellulose Based Wood Composite Under Four- Point Bending, Maharshi Dave, Tejas Pandya, Jason Street
Early Career Technical Journal (ECTJ)
Section 5: Materials; pp. 98-101
Macroscopic Evolution Of Corrosion In An Aluminum Alloy, Tete Tevi, Ramana M. Pidaparti
Macroscopic Evolution Of Corrosion In An Aluminum Alloy, Tete Tevi, Ramana M. Pidaparti
Early Career Technical Journal (ECTJ)
Section 5: Materials; pp. 102-105
Mesoscale Modeling Of Grain Crushup In Eglin Sand Through Discrete Element Fractal Fragmentation, Gerald Pekmezi, David Littlefield
Mesoscale Modeling Of Grain Crushup In Eglin Sand Through Discrete Element Fractal Fragmentation, Gerald Pekmezi, David Littlefield
Early Career Technical Journal (ECTJ)
Section 5: Materials; pp. 106-112
Thermal Management Of Pa-03-10-600 Linear Electromechanical Actuator End Windings Using Straight Circular Heat Pipes And Fins, August Akuoko Kwarteng, Kamal Kaddoura, Jose Corona Jr, Quin H. Leland, Louis Chow, John Kizito
Thermal Management Of Pa-03-10-600 Linear Electromechanical Actuator End Windings Using Straight Circular Heat Pipes And Fins, August Akuoko Kwarteng, Kamal Kaddoura, Jose Corona Jr, Quin H. Leland, Louis Chow, John Kizito
Early Career Technical Journal (ECTJ)
Section 6: Thermal Sciences; pp. 115-122
Shaft Cooling For High Speed Applications, Obed Y W Abotsi, S Esau, R Kabir, J P. Kizito
Shaft Cooling For High Speed Applications, Obed Y W Abotsi, S Esau, R Kabir, J P. Kizito
Early Career Technical Journal (ECTJ)
Section 6: Thermal Sciences; pp. 123-130
A Parametric Study On The Performance Of Heat Sinks, Britney Sumayah, Kendrick Aung
A Parametric Study On The Performance Of Heat Sinks, Britney Sumayah, Kendrick Aung
Early Career Technical Journal (ECTJ)
Section 6: Thermal Sciences; pp. 131-136
Suitability, Sizing, And Configuration Of A Solar Powered Vapor Absorption Cooling System, Harold A. Walters, Tejas S. Pandya
Suitability, Sizing, And Configuration Of A Solar Powered Vapor Absorption Cooling System, Harold A. Walters, Tejas S. Pandya
Early Career Technical Journal (ECTJ)
Section 6: Thermal Sciences; pp. 137-145
Control Of Flow Separation On A Hump Model Using A Dielectric Barrier Discharge Plasma Actuator, Mahdi Hasan, Michael Atkinson
Control Of Flow Separation On A Hump Model Using A Dielectric Barrier Discharge Plasma Actuator, Mahdi Hasan, Michael Atkinson
Early Career Technical Journal (ECTJ)
Section 7: Numerical Methods; pp. 148-154
Solving Knights Covering Problem: Backtracking, Permutation, Bipartite Graph, And Independent Set, Serkan Guldal, Michael Lipscomb, Murat M. Tanik
Solving Knights Covering Problem: Backtracking, Permutation, Bipartite Graph, And Independent Set, Serkan Guldal, Michael Lipscomb, Murat M. Tanik
Early Career Technical Journal (ECTJ)
Section 7: Numerical Methods; pp. 155-160
Effect Of Thermal Conduction On Turbulent Heat Transfer For Attached And Separated Flows, M Elmellouki, S Bhushan
Effect Of Thermal Conduction On Turbulent Heat Transfer For Attached And Separated Flows, M Elmellouki, S Bhushan
Early Career Technical Journal (ECTJ)
Section 7: Numerical Methods; pp. 161-169
An Implementation Of The Automotive External Airbag To Examine Impact Mitigation, Dhruvesh Modi, Lee Moradi
An Implementation Of The Automotive External Airbag To Examine Impact Mitigation, Dhruvesh Modi, Lee Moradi
Early Career Technical Journal (ECTJ)
Section 7: Numerical Methods; pp. 170-178
Recumbent Bicycle Balancing Aid, James Hager
Recumbent Bicycle Balancing Aid, James Hager
Williams Honors College, Honors Research Projects
For our senior design project, our team will be consulting to create a balancing aid system intended for the recumbent bicycle shown below in Figure 1. The owner of the bicycle is Robert Henderson, a former United States Navy sailor from Northeast Ohio who picked up biking and skiing while he was stationed in Maine in the late 80’s. While there, he took to the mountains on the rugged terrain and brought this passion of biking back home to share with his wife, Johanna once he completed his service to his country. Biking became an integral part of the …
The Characterization And Fatigue Life Impact From Surface Roughness On Structurally Relevant Features Produced Using Additive Manufacturing, Eric-Paul Daniel Tatman
The Characterization And Fatigue Life Impact From Surface Roughness On Structurally Relevant Features Produced Using Additive Manufacturing, Eric-Paul Daniel Tatman
Browse all Theses and Dissertations
Additive manufacturing (AM) produces rough surfaces that are detrimental to the mechanical performance of the part. In this work, downward-facing surfaces were fabricated in alloy 718 using laser powder bed fusion and investigated with surface characterization and axial fatigue testing. Coupons with downward-facing surfaces at 45°, 60°, and 75° and flat axial fatigue bars with as-built and machined holes were built. Both specimens were fabricated with three levels of downskin laser power and the coupons with three levels of downskin laser speed. Surface characterization showed roughness increased as the downward-facing angle decreased. Fatigue testing with digital image correlation showed localized …
Engineering Success On The Field: A Reflection On The Epics Ironman Pediatric Prosthetic Project, Glynn Gallaway
Engineering Success On The Field: A Reflection On The Epics Ironman Pediatric Prosthetic Project, Glynn Gallaway
Purdue Journal of Service-Learning and International Engagement
Glynn Gallaway is a student in the Purdue Mechanical Engineering Class of 2020 with interests in the health care, assistive technology, and medical device industries. Glynn is from Dallas, Texas, and was inspired to pursue this career path through her interactions with youth with special needs. She joined the EPICS Ironman team in the fall of 2016 during her first year at Purdue as a part of the learning community. In this article, she discusses her experiences on the Ironman team creating a pediatric prosthetic for a young local athlete. The goal of the Ironman team is to create a …
A Perceptual Comparison Of “Black Box” Modeling Algorithms For Nonlinear Audio Systems, Paul G. Mayo
A Perceptual Comparison Of “Black Box” Modeling Algorithms For Nonlinear Audio Systems, Paul G. Mayo
Student Theses
Nonlinear systems identification is a widespread topic of interest, particularly within the audio industry, as these techniques are employed to synthesize black box models of nonlinear audio effects. Given the myriad approaches to black box modeling, questions arise as to whether an “optimal” approach exists, or one that achieves valid subjective results as a model with minimal computational expense. This thesis uses ABX listening tests to compare black box models of three hardware audio effects using two popular nonlinear implementations, along with two proposed modified implementations. Models were constructed in the Hammerstein form using sine sweeps and a novel measurement …
A Swing Generator Using Water Power Produced By The Wind, Ruka Ozaki
A Swing Generator Using Water Power Produced By The Wind, Ruka Ozaki
The International Student Science Fair 2018
I focus on various kinds of natural energy sources, especially wind. Wind power generation is the most-used method of electricity generation using wind power. Wind power generation has many merits; it achieves high efficiency of electric power generation, it can generate electricity even during the night, it doesn’t make any hazardous materials. However, there are not only merits but also demerits. It can cause bird strike, environment disruption from noise and low-frequency wave. And besides, we must comply building laws when we build wind power generators. Thus I built ‘a swing generator using water power produced by the wind power’, …
Rc Baja Car Suspension, Tyler Martin
Rc Baja Car Suspension, Tyler Martin
All Undergraduate Projects
This year the Mechanical Engineering Technology Department at CWU is holding an R/C Baja car competition using the same rules as the ASME competition. The designed car must compete in three separate events: the slalom course, drag race, and obstacle course. By not only completing, but also being competitive in each of the events, the car will be deemed a success. Suspension and steering are two essential components of any R/C car, and was the main focus for this report. The suspension must be able to support the car in the event of impacts. In addition, the steering must be …
Senior Project Hauff Tree Pruner, Brian Woolery
Senior Project Hauff Tree Pruner, Brian Woolery
All Undergraduate Projects
Neil Hauff, a business owner and entrepreneur from the Yakima valley challenged a team of engineering students from Central Washington University to design a motorized apple tree pruner. This report will discuss the engineering and construction that went into creating the housing of the tree pruner. The housing component needed to be able to protect the moving parts of the pruner, while withstanding the rotational torque produced by the Makita power drill used to drive the pruner. The biggest constraint in designing the housing was to keep the weight of the housing component under 1.5 lbs, while still keeping the …
Non-Intrusive Optical Measurement Of Electron Temperature In Near Field Plume Of Hall Thruster, Peter J. Urban
Non-Intrusive Optical Measurement Of Electron Temperature In Near Field Plume Of Hall Thruster, Peter J. Urban
ETD Archive
Currently there is a large interest in the use of more efficient means of propulsion in long term missions due to the costs and difficulties associated with placing and maintaining the needed fuel for conventional chemical systems in orbit. Mass reduction of upper stages will return large returns due to the great reduction in required lower stage fuel. Due to these factors, alternatives are undergoing active research, though this paper is concerned with the area of electrical propulsion. Electric propulsion is broadly defined as propulsion where the energization of the exhaust occurs via application of electromagnetic fields as opposed to …
Neuromuscular Reflex Control For Prostheses And Exoskeletons, Sandra K. Hnat
Neuromuscular Reflex Control For Prostheses And Exoskeletons, Sandra K. Hnat
ETD Archive
Recent powered lower-limb prosthetic and orthotic (P/O) devices aim to restore legged mobility for persons with an amputation or spinal cord injury. Though various control strategies have been proposed for these devices, specifically finite-state impedance controllers, natural gait mechanics are not usually achieved. The goal of this project was to invent a biologically-inspired controller for powered P/O devices. We hypothesize that a more muscle-like actuation system, including spinal reflexes and vestibular feedback, can achieve able-bodied walking and also respond to outside perturbations. The outputs of the Virtual Muscle Reflex (VMR) controller are joint torque commands, sent to the electric motors …
H.F. Hauff Pruner Cutting Blades, Wyley Stewart
H.F. Hauff Pruner Cutting Blades, Wyley Stewart
All Undergraduate Projects
Apple orchards are a critical component of agriculture in the United States, and keeping the apple trees in the best shape for optimum growth and production is hard work. Neil Hauff, an agriculture industry expert, challenged students at CWU to engineer a power assisted tree pruner. Across the country, apple orchards need pruned every season. The pruning of the trees is strenuous manual labor that requires many man hours. The proposed solution is to create a power assisted tree pruner that would minimize the amount of work needed to trim each tree branch. This project has been separated into three …
Deformation And Stress Averaging For Statistical Ensembles Of Particle Aggregate Mesoscale Models, Gerald Pekmezi, David Littlefield
Deformation And Stress Averaging For Statistical Ensembles Of Particle Aggregate Mesoscale Models, Gerald Pekmezi, David Littlefield
Early Career Technical Journal (ECTJ)
Section 4: Materials; pp. 104-111
Optimization Of Heat Sinks In A Range Of Configurations., Archibald Allswell Amoako
Optimization Of Heat Sinks In A Range Of Configurations., Archibald Allswell Amoako
Electronic Theses and Dissertations
In this study, different heatsink geometries used for electronic cooling are studied and compared to each other to determine the most efficient. The goal is to optimize heat transfer of the heat sinks studied in a range of configuration based on fin geometry. Heat sinks are thermal conductive material devices designed to absorb and disperse heat from high-temperature objects (e.g. Computer CPU). Common materials used in the manufacturing of heat sinks are aluminum and copper due to their relatively high thermal conductivity and lightweight [1]. Aluminum is used as the material for the heatsinks studied in this research project. To …
The Barrier-To-Entry Of Robotics Development Through The Use Of Robot Operating System, Matham Latif Al-Saaty, Kevin Mcfall
The Barrier-To-Entry Of Robotics Development Through The Use Of Robot Operating System, Matham Latif Al-Saaty, Kevin Mcfall
Early Career Technical Journal (ECTJ)
Section 3: Miscellaneous; pp. 86-90
Proceedings Of The 18th Annual Early Career Technical Conference (Front Matter), Ectc Coordinating Committee
Proceedings Of The 18th Annual Early Career Technical Conference (Front Matter), 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. i-xii
Section 3: Miscellaneous, Ectc Coordinating Committee
Section 3: Miscellaneous, 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. 71-90
Effect Of Screen Layers And Orientations On Mesh Wicked Heat Pipes, K Kaddoura, O Y W Abotsi, John Kizito
Effect Of Screen Layers And Orientations On Mesh Wicked Heat Pipes, K Kaddoura, O Y W Abotsi, John Kizito
Early Career Technical Journal (ECTJ)
Section 1: Thermal Sciences; pp. 27-32
Numerical Predictions Of Hydrokinetic Turbine Wake And Freesurface Signatures, Oumina El Fajri, Simon Bushan, D Thompson
Numerical Predictions Of Hydrokinetic Turbine Wake And Freesurface Signatures, Oumina El Fajri, Simon Bushan, D Thompson
Early Career Technical Journal (ECTJ)
Section 2: Numerical Methods; pp. 43-51
Section 1: Thermal Sciences, Ectc Coordinating Committee
Section 1: Thermal Sciences, 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. 1-32