Mechanical Engineering Commons^™

Asme Design Challenge: Penathlon Robot, Roxann Roque

All Undergraduate Projects

The American Society of Mechanical Engineers (ASME) 2017 Design Challenge is modeled after the 2016 Rio Olympics. Participants must build a robot to compete in Olympic style events. These Olympic events include a 10 meter sprint, golf ball hit, tennis ball throw, weight lift and stair climb. The sprint and stair climb event success is measured by time elapsed to complete the event. The weight lift is measured in weight lifted multiplied by height lifted, Newton-meters. The golf ball hit and tennis ball throw are evaluated by distance from robot. A robot was designed to meet this criteria. Analysis methods …

Built-In Bicycle Rack For Cars, Scott A. Hansberry

All Undergraduate Projects

Transporting a bicycle after riding somewhere and then needing to be pickup can be problematic. Bicycles will not fit in most vehicles without removing components. There is also the risk of damaging the inside of the vehicle. Expecting everyone to have a bike rack for their vehicle is unrealistic because the bike rack could be considered unappealing visually, take up to much space in the trunk, or limit the vehicle owner’s access to the trunk. The solution to this problem is a bike rack that mounts onto your car and then mounts your bike onto the rack. Most people don’t …

Pin Router Duplicator, Daniel Phan

All Undergraduate Projects

The purpose of this project is to develop a pin router duplicator to accurately produce guitar bodies, necks, and fret boards. The pin router duplicator is designed to speed up the production process for the class Lean Manufacturing (MET 345), offered at Central Washington University. In the class, students learn how to work as a team to improve the way a woodshop is ran. In Lean Manufacturing, guitar bodies, necks, and fret boards are produced by using a CNC router. For this project, the motivation is to increase production by reducing production time. Accuracy and repeatability is also taken into …

Adjustable Height Table Chassis, Trevor Watkins

All Undergraduate Projects

Having the ability to change a dining table between a sitting and standing position is a niche feature. This feature was created for people that play board games regularly at a table, or for people who require use of a dining table as a standing work area. The mechanism that the table works by is using an acme threaded rod as a lead screw, with two timing belt pullies driving the shafts up and down which cause the raising and lowering of the table. These pullies were machined to incorporate an ACME threaded bolt which was welded into each pully. …

Instant Hot Water Heater, Hunter Arnold

All Undergraduate Projects

One of the first steps in the beer brewing process is to heat water to a specific temperature before it is mixed with the malt. The purpose of this project was to make a more compact and efficient heating device for the beer brewing process. The output temperature must be between 170⁰F and 180⁰F. The minimum flow rate should be half a gallon per minute with the maximum flow rate of three gallons per minute. The device will also need to mount to a collapsible beer rack being designed by Andrew Kastning. The device will be primarily compromised of two …

H.F. Hauff Outrigger: Vertical Arm, Juan Tovar

All Undergraduate Projects

H.F. Hauff is a company based out of Yakima which specializes in farming equipment. One of their products is a trailer which has a wind machine attached to it. In order to keep the fan’s thrust from tipping the trailer over, the trailer needs outriggers to extend out. The outriggers also serve as a way to level out the trailer in uneven surfaces. The outriggers are what needed to be designed. This portion of the project was the vertical arm which extends from the horizontal arm, and goes towards the ground to raise the trailer. The project consisted of three …

Asme Rc Baja Car: Suspension And Chassis, C. Aidan Pringle

All Undergraduate Projects

Each year the regional chapter of the American Society of Mechanical Engineers (ASME) put on a Radio Controlled (R/C) Baja car competition. The R/C car designed for the competition must compete in two events, a slalom sprint and an obstacle course. A successfully designed car will not only be able to complete each event but also be competitive in each event. A main component to the success of the R/C car is the suspension. The suspension design for this year’s car must operate effectively without interfering with the steering and drivetrain designed by Walter Lackey. The suspension utilizes a transverse …

Edge Geometry Effects On Resonance Response Of Electroplated Cylindrical Ni/Pzt/Ni Magnetoelectric Composites, Vladislav Yakubov, Lirong Xu, Alex A. Volinsky, Lijie Qiao, De’An Pan

Mechanical Engineering Faculty Publications

Trilayer Ni/PZT/Ni cylindrical magnetoelectric (ME) composites were prepared by electrodeposition, a process, which creates sub-millimeter raised edges due to current concentration near sharp points. The ME response in both axial and vertical modes was measured with the edges, with only outer edges removed, and with both outer and inner edges removed. The ME voltage coefficient improved at resonance by 40% and 147% without the edges in the vertical and axial modes, respectively. The observed improvements in three different samples were only present at the ME resonance and no changes were detected outside of the ME resonance. Mechanical quality factor at …

Variational Principles In Classical Mechanics, Douglas Cline

Library Books

Two dramatically different philosophical approaches to classical mechanics were developed during the 17th - 18th centuries. Newton developed his vectorial formulation that uses time-dependent differential equations of motion to relate vector observables like force and rate of change of momentum. Euler, Lagrange, Hamilton, and Jacobi, developed powerful alternative variational formulations based on the assumption that nature follows the principle of least action. These powerful variational formulations have become the preeminent philosophical approach used in modern science, as well as having applications to other fields such as economics and engineering.

This book introduces variational principles, and illustrates the intellectual beauty, the …

Biomechanics Of Concussion: The Importance Of Neck Tension, Ron Jadischke

Wayne State University Dissertations

Linear and angular velocity and acceleration of the head are typically correlated to concussion. Despite improvements in helmet performance to reduce accelerations, a corresponding reduction in the incidence of concussion has not occurred (National Football League [NFL] 1996 – present).

There is compelling research that forces on and deformation to the brain stem are related to concussion. The brain stem is the center of control for respiration, blood pressure and heart rate and is the root of most cranial nerves. Injury to the brain stem is consistent with most symptoms of concussion reported in the National Football League and the …

Size Effect Of Clay Filler Particles On Mechanical Properties Of Pultruded Polymer Composites Under Shear Loading, Jaysimha Reddy Sonti Reddy

All Graduate Theses, Dissertations, and Other Capstone Projects

Polymer composites are finding a range of applications across different fields of engineering. Hence, there is a need to understand the properties of these polymer composites. Mechanical testing can be done to determine the properties but firstly the composite must be manufactured consuming time and money. However, if the properties gained differ from those expected from composite the obtained data is rejected, and a new composite must be manufactured consuming more time and effort.

The micromechanical models play an important role in estimating the properties of the polymer composites. These models estimate the properties of the composite by estimating the …

Process Parameter Optimization With Numerical Modelling And Experimentation Design Of Binder Jet Additive Manufacturing, Sairam Vangapally

All Graduate Theses, Dissertations, and Other Capstone Projects

Binder jetting technology is an additive manufacturing technology in which powder materials are binded together layer by layer forming the product from input CAD model. The process involves printing the product layer by layer, curing and sintering. The mechanical properties of 3D printed samples varies based on process parameters, hence there is a need to tune the process parameters for optimal characteristics. Three main parameters namely layer thickness, sintering time and sintering temperature were identified and the study focuses on the effect of parameters on dimensional accuracy and compressive strength of the samples. Full factorial experimental approach was used to …

Anisotropy Evolution Due To Surface Treatment On 3d-Printed Fused Deposition Modeling (Fdm) Of Acrylonitrile Butadiene Styrene (Abs), Blake E. Lozinski

Honors Undergraduate Theses

Purpose: This paper will present insight to the methodology and results of the experimental characterization of Acrylonitrile Butadiene Styrene (ABS) using Fused Deposition Modeling (FDM). The work in this research explored the effects of print orientation, surface treatment, and ultraviolet (UV) light degradation with the utilization of Digital Image Correlation (DIC) on ABS tensile specimens.

Design/methodology: ABS specimens were printed at three build orientations (flat (0 degrees), 45 degrees, and up-right (90 degrees)). Each of these specimens were treated with three different surface treatments including a control (acrylic paint, Cyanoacrylate, and Diglycidyl Bisphenol A) followed by exposure to UV light …

Chaotification As A Means Of Broadband Vibration Energy Harvesting With Piezoelectric Materials, Daniel Geiyer

Electronic Theses and Dissertations

Computing advances and component miniaturization in circuits coupled with stagnating battery technology have fueled growth in the development of high efficiency energy harvesters. Vibration-to-electricity energy harvesting techniques have been investigated extensively for use in sensors embedded in structures or in hard-to-reach locations like turbomachinery, surgical implants, and GPS animal trackers. Piezoelectric materials are commonly used in harvesters as they possess the ability to convert strain energy directly into electrical energy and can work concurrently as actuators for damping applications. The prototypical harvesting system places two piezoelectric patches on both sides of the location of maximum strain on a cantilever beam. …

Development Of A Finite Element Pelvis And Lower Extremity Model With Growth Plates For Pediatric Pedestrian Protection, Ming Shen

Wayne State University Dissertations

Finite element (FE) model is a useful tool frequently used for investigating the injury mechanisms and designing protection countermeasures. At present, no 10 years old (YO) pedestrian FE model has been developed from appropriate anthropometries and validated against limitedly available impact response data. A 10 YO child FE pelvis and lower extremities (PLEX) model was established to fill the gap of lacking such models in this age group. The baseline model was validated against available pediatric postmortem human subjects (PMHS) test data and additional scaled adult data, then the PLEX model was integrated to build a whole-body FE model representing …

Thermal Analysis Of 3d Printed 420 Stainless Steel, Adithya Pothuri

All Graduate Theses, Dissertations, and Other Capstone Projects

Additive manufacturing opens new possibilities in the manufacturing industry. 3D printing is a form of additive manufacturing. 3D printers will have a significant influence over the industrial market, with extremely positive effects in no time. The main aim of this research is to determine the effect of process parameters of Binder Jet manufactured 420 Stainless Steel (420SS) parts on thermal properties such as thermal conductivity. Different parameters, such as layer thickness, sintering time and sintering temperature were varied. A full factorial design of experiment matrix was made by varying these parameters using two levels. Testing showed that different parameters affected …

Co-Gasification Of Coal And Biomass Wastes In An Entrained Flow Gasifier: Modelling, Simulation And Integration Opportunities, Dalia A. Ali Eng, Mamdouh A. Gadalla Prof., Omar Y. Abdelaziz, Christian P. Hulteberg, Fatma H. Ashour Prof.

Chemical Engineering

Gasification processes convert carbon-containing material into syngas through chemical reactions in the presence of gasifying agents such as air, oxygen, and steam. Syngas mixtures produced from such processes consist mainly of carbon monoxide (CO), hydrogen (H2), carbon dioxide (CO2), and methane (CH4); this gas can be directly utilised as a fuel to produce electricity or steam. Besides, it is regarded as a basic feedstock within the petrochemical and conventional refining industries, producing various useful products like methanol, hydrogen, ammonia, and acetic acid. In this work, a rigorous process model is developed to simulate the co-gasification of coal-biomass blends through an …

3d Bioprinting Of Stem Cells And Polymer/Bioactive Glass Composite Scaffolds For Bone Tissue Engineering, Caroline Murphy, Krishna Kolan, Wenbin Li, Julie A. Semon, D. E. Day, Ming-Chuan Leu

Biological Sciences Faculty Research & Creative Works

A major limitation of using synthetic scaffolds in tissue engineering applications is insufficient angiogenesis in scaffold interior. Bioactive borate glasses have been shown to promote angiogenesis. There is a need to investigate the biofabrication of polymer composites by incorporating borate glass to increase the angiogenic capacity of the fabri-cated scaffolds. In this study, we investigated the bioprinting of human adipose stem cells (ASCs) with a polycaprolac-tone (PCL)/bioactive borate glass composite. Borate glass at the concentration of 10 to 50 weight %, was added to a mixture of PCL and organic solvent to make an extrudable paste. ASCs suspended in Matrigel …

Careers In Engineering Lesson Plan, Lindsay Snowden

ENgaging Educators in Renewable enerGY (ENERGY): Lesson Plans & Slideshows (2017-2019)

Careers in Engineering Lesson Plan. The activity is to create a version of a robotic hand with the supplies provided,

Development Of Guidance Laws For A Reduced Order Dynamic Aircraft Model, Jack W. Brendlinger

Browse all Theses and Dissertations

A set of guidance control laws has been developed for enabling three distinct modes of operation of a reduced order dynamic aircraft model. These include 1) a waypoint following control law, 2) a trajectory tracking control law, and 3) a set of kinematically constrained control laws for reaching a commanded altitude, speed or heading. The formulation of the reduced order model is presented so that the capabilities and limitations of the model are understood, and so that the interface architecture between the controllers and the plant is clearly defined. The controller formulations are then presented, together with sample results. The …

Lean Implementation Through Process Automation, Olusola Onadipe Jr.

All Graduate Theses, Dissertations, and Other Capstone Projects

As lean manufacturing is increasingly becoming a common practice today in an effort to keep companies competitive, new and innovative processes are becoming the norm. Part of that innovation includes the development of automated machinery that can help alleviate some struggles with lead times and reduce overall labor. It is all in keeping with the trend of building products cheaper and faster to gain that edge. Company X has been focusing their efforts on lean manufacturing for years now. This paper covers an important project that involves the implementation of a complex mechanical system in an effort to build products …

Spatial And Temporal Compressive Sensing For Vibration-Based Monitoring: Fundamental Studies With Beam Vibrations, Vaahini Ganesan

Electronic Theses and Dissertations

Vibration data from mechanical systems carry important information that is useful for characterization and diagnosis. Standard approaches rely on continually streaming data at a fixed sampling frequency. For applications involving continuous monitoring, such as Structural Health Monitoring (SHM), such approaches result in high data volume and require powering sensors for prolonged duration. Furthermore, adequate spatial resolution, typically involves instrumenting structures with a large array of sensors. This research shows that applying Compressive Sensing (CS) can significantly reduce both the volume of data and number of sensors in vibration monitoring applications. Random sampling and the inherent sparsity of vibration signals in …

Electroencephalographic Signal Processing And Classification Techniques For Noninvasive Motor Imagery Based Brain Computer Interface, Md Erfanul Alam

College of Graduate Studies: Theses & Dissertations

In motor imagery (MI) based brain-computer interface (BCI), success depends on reliable processing of the noisy, non-linear, and non-stationary brain activity signals for extraction of features and effective classification of MI activity as well as translation to the corresponding intended actions. In this study, signal processing and classification techniques are presented for electroencephalogram (EEG) signals for motor imagery based brain-computer interface. EEG signals have been acquired placing the electrodes following the international 10-20 system. The acquired signals have been pre-processed removing artifacts using empirical mode decomposition (EMD) and two extended versions of EMD, ensemble empirical mode decomposition (EEMD), and multivariate …

Advancing Intersection Management By Utilizing Cost Effective Intelligent Vehicle Concepts And Vehicle-To-Infrastructure Communication Techniques, Bernard O. Ibru

College of Graduate Studies: Theses & Dissertations

Intelligent Transport Systems (ITS) is a growing field of research which focuses on the alleviation of traffic congestion and road accidents caused by miscommunication or confusion of human drivers. Intelligent Intersection Management is a subdivision of ITS which focuses on the seamless management of vehicles arriving at, traversing and exiting intersections to prevent congestion and collision within or around the intersection. This research sought to develop a cost effective method of implementing wireless Vehicle-to-Infrastructure (V2I) communication based Intelligent Intersection Management, by employing the use of 1:4.5 scale version autonomous vehicle prototypes, on a similarly scaled four-way intersection. This was accomplished …

Natural Convection Heat Transfer Of Inclined Sierpinski Carpet Fractal Fins, Luke A. Fussell

College of Graduate Studies: Theses & Dissertations

When designing extended surfaces for the thermal management of electronic devices in aerospace applications it is critically important to minimize mass. However, this can be difficult to achieve as the rate of heat dissipated is directly proportional to the surface area. Fortunately, when certain fractal geometries, like the Sierpinski carpet, are utilized in the design of extended surfaces an increase in surface area and simultaneous decrease in mass can be achieved. The thermal performance of fins inspired by the first four fractal iterations of the Sierpinski carpet pattern was experimentally examined in a natural convection environment. The fractal fins were …

Development Of A Dynamic Cfd Model For Offshore Oscillating Water Columns With Non-Linear Interactions, Ken O'Connell

Theses

This thesis focuses on the development of a state of the art modelling technique for offshore Oscillating Water Column (OWC) type Wave Energy Converters (WEC) using Computational Fluid Dynamics (CFD). Current literature indicates a limited amount of work has been completed on studying these devices containing non-linear time dependent flow phenomenon. Initially, a 2D Numerical Wave Tank (NWT) is studied to reduce discretisation error in order to reproduce accurately propagating waves. Further development into a 3D domain permits the geometrical requirements of an OWC type spar buoy to be included.

In parallel, a single Degree of Freedom (DOF) model is …

Development & Validation Of An Improved Biomechanical Model For Motion Analysis, Darren Dawson

Theses

Three dimensional motion analysis systems are utilised across a number of different disciplines, including clinical gait analysis, sports performance studies and analysis of tasks of daily living. These systems utilise biomechanical models which define body segment coordinate systems and calculate kinematic and kinetic relationships about the joints between adjacent coordinate systems. In this study, a biomechanical model for general use in motion analysis was developed and validated. It was designed to improve upon the accuracy and capability of currently available models. The newly developed model utilises state of the art techniques to accurately define body segment coordinate systems. Accurate predictive …

Bio Inspired Lightweight Composite Material Design For 3d Printing, Kaushik Thiyagarajan

Electronic Theses and Dissertations

Lightweight material design is an indispensable subject in product design. The lightweight material design has high strength to weight ratio which becomes a huge attraction and an area of exploration for the researchers as its application is wide and increasing even in every day-to-day product. Lightweight composite material design is achieved by selection of the cellular structure and its optimization. Cellular structure is used as it has wide multifunctional properties in addition to the lightweight characteristics. Applications of light weight cellular structures are wide and is witnessed in all industries from aerospace to automotive, construction to product design. In this …

Retarding Field Energy Analyzer For High Energy Pulsed Electron Beam Measurements, J. Hu, Joshua L. Rovey, W. Zhao

Mechanical and Aerospace Engineering Faculty Research & Creative Works

No abstract provided.

Resilient Control Of Active-Passive Networked Multiagent Systems In The Presence Of Persistent Disturbances, Dzung Tran, Tansel Yucelen, John Daniel Peterson

Mechanical and Aerospace Engineering Faculty Research & Creative Works

An active-passive networked multiagent system consists of agents subject to inputs (active agents) and agents without any inputs (passive agents). Specifically, this class of networked multiagent systems utilizes a novel form of dynamic consensus filters, where the states of all agents converge to the average of the exogenous inputs applied only to the active agents, and it has broad practical applications including, for example, real-time situational awareness and data gathering using sensor networks and distributed control of multirobot systems. In this paper, we focus on active-passive networked multiagent systems that are subject to constant and/or harmonic exogenous disturbances. In particular, …