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Articles 1 - 30 of 189
Full-Text Articles in Engineering
Design Of A Test Frame And Its Corresponding Test Methods For A Deployable Composite Boom, William Luther Montgomery
Design Of A Test Frame And Its Corresponding Test Methods For A Deployable Composite Boom, William Luther Montgomery
Theses and Dissertations
Deployable composite booms (DCB) are an advanced class of support beams growing in applications including solar collectors and solar sails. DCBs can be coiled or folded into a compact footprint and the ability to be deployed, and in some design, concepts redeployed, making them optimal components for aerospace where weight and volume are finite resources. DCBs are a cutting-edge technology that has yet to be perfected with a need for longer booms with increased stiffnesses to accommodate the latest proposed designs. Atomic-6 has proposed a 16-foot boom manufactured using an autoclave process which aims to reach the goal of producing …
Drop Test Release Mechanism, Sophie M. Getty, Matthew A. Tichenor, Nash W. Levy, Connor D. Dilloughery
Drop Test Release Mechanism, Sophie M. Getty, Matthew A. Tichenor, Nash W. Levy, Connor D. Dilloughery
Mechanical Engineering
Many boxes for shipping undergo drop tests by the manufacturer to ensure their durability. Certain constraints are necessary to successfully carry out these tests such as not damaging the box prior to the drop and maintaining consistency throughout every drop.
Our team has designed a Drop Test Release Mechanism that addresses these constraints. It provides repetitive drops for different objects that vary in shape and size such as small electronics or parts. This device utilizes a soft-clamping mechanism that can release an object with minimal force applied onto it prior to drop. A frame made of 80/20 was designed to …
Free-Body Diagram Analysis And Movement Design Of A Functional Prosthetic Hand, Hayden Smee
Free-Body Diagram Analysis And Movement Design Of A Functional Prosthetic Hand, Hayden Smee
Honors College Theses
The loss of a limb is a devastating event to an individual on both physical and psychological levels. Despite decades of advancements in medicine, occupational health, and general safety in society, most people know someone or have encountered individuals affected by limb loss. This project created a prosthetic hand designed to aid those individuals. The hand is a predominantly 3D-printed prosthetic hand that includes an individually moving index finger and opposable thumb capable of grasping a full soda can weighing 385 grams (0.85 pounds). Numerous design solutions for the actuation of the fingers and thumb were considered and rejected. Cable …
Assessing The Performance Of High-Rap Mixtures Incorporating Crude Vegetable Oils And An Antioxidant From Mechanical, Environmental, And Economic Perspectives, Nitish R. Bastola
Assessing The Performance Of High-Rap Mixtures Incorporating Crude Vegetable Oils And An Antioxidant From Mechanical, Environmental, And Economic Perspectives, Nitish R. Bastola
Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research
Utilization of mixtures with high amounts of reclaimed asphalt pavement (RAP) in the pavement industry is limited because of the adverse effects of aged materials in recycled asphalt materials. To date, numerous approaches have been used to reduce the adversity of RAP in mixtures. One such approach is the use of recycling agents (RAs) from various sources, such as petroleum and bio-oil. However, the current need is to maximize the use of RAP by adopting a sustainable source of RAs. Therefore, this study uses two RAs based on vegetable oils (crude soybean oil and crude corn oil) with high-RAP mixtures …
Jcati Carbon Fiber Recycler: Crusher System, Devin Riley
Jcati Carbon Fiber Recycler: Crusher System, Devin Riley
All Undergraduate Projects
With a substantial rise in Carbon Fiber use across all industries, the need for a way to recycle the waste has grown as well. A group of Mechanical Engineering Technology students at Central Washington University funded by the Joint Center for Aerospace Technology (JCATI) have created a machine to recycle waste wing trimmings from the Boeing company’s airplanes. This machine consists of 5 different sub-assemblies being the oven, crusher, gear train, conveyor, and shredder. The purpose of this project was to decrease the deflection in the crusher caused by bulging in the housing and movement of the bearings. To decrease …
Recycling Of Cured Carbon Fiber/Epoxy Resin Laminated Composites Scraps: Processing And Characterization, Khaled Mohammed Al Harmoodi
Recycling Of Cured Carbon Fiber/Epoxy Resin Laminated Composites Scraps: Processing And Characterization, Khaled Mohammed Al Harmoodi
Theses
The concept of reinforced composites came decades ago from the need to fabricate high-strength, heat-resistant, wear-resistant, and low-density materials. The polymer matrix composites offer a wide range of applications due to the collaborative nature of the functional fillers and polymers present. Towards the twenty-first century, the aviation industry flourished due to flying being the preferred way of travel across states and countries. With such a massive demand for air transport, there is an equally parallel demand for the production of aircraft components. This study aims to reuse the waste of uncured composite prepreg scraps from the ply-cutting manufacturing process in …
Manual Material Handling Lift-Assist System For Occupational Exoskeleton, Erik Goes, Daniel Guthrie, Trevor Ward
Manual Material Handling Lift-Assist System For Occupational Exoskeleton, Erik Goes, Daniel Guthrie, Trevor Ward
Honors Capstones
It is no secret that lifting heavy objects is one of the premier causes of workplace injury, and the modern worker needs help to remain healthy. Workers need something they always have with them that makes their work safer as well as easier; our solution is an active lift-assist exoskeleton. The proposed exoskeleton design includes a military backpack exoskeleton frame, on which two actuators pull cables attached to end effectors that the operator will be holding. This system can adjust to conform to a wide variety of operator sizes, without restricting any of their range of motion. This leads to …
Cal Poly Fluid Power Vehicle Challenge 2022, Sangmin Sung, Eddy Rodriguez, Travis Welch, Jeremy Baechler, Kevin Pauls
Cal Poly Fluid Power Vehicle Challenge 2022, Sangmin Sung, Eddy Rodriguez, Travis Welch, Jeremy Baechler, Kevin Pauls
Mechanical Engineering
In this report, the Featherweight Cycles design team puts forth the scope and overview of their design project, discusses background research and competitor analysis, and presents the project’s final design and manufacturing plans. The overall goal of this project is to fabricate and compete in the Fluid Power Vehicle Challenge, hosted by the National Fluid Power Association. To better define the design process, the team researched previous year’s designs from Cal Poly, as well as winning designs from the last two years to form a baseline of knowledge about competing schools’ designs. After researching multiple design paths, Featherweight Cycles chose …
Experimental Setup Of A Rapid Compression Machine For Spark Ignition Studies, Daniel Llaguno
Experimental Setup Of A Rapid Compression Machine For Spark Ignition Studies, Daniel Llaguno
Electronic Theses and Dissertations
The main objective of this thesis is to document the design and development of a rapid compression machine (RCM). A series of tests were performed to verify the operation of the system using the compression of air. Finally, an experiment was conducted to validate the auto-ignition temperature of DME under HCCI mode. Based on the first version of the RCM, improvements were made to speed up the compression process, and to create the conditions required for the auto-ignition of a DME-air mixture. The inlet diameter of the pneumatic actuation cylinder was increased to reduce the choking effect of the air …
Development Of A Multi-Scale Mechano-Electrochemical Battery Model, Drew J. Pereira
Development Of A Multi-Scale Mechano-Electrochemical Battery Model, Drew J. Pereira
Theses and Dissertations
As the automotive industry moves towards large format electric vehicles, such as trucks and SUVs, the need for highly efficient, energy-dense electrodes rapidly increases. Several promising active materials have been studied and proposed, however, many of these materials undergo significant volume change upon lithiation and de-lithiation. Cell and pack designers struggle to understand and predict how active material volume change at the particle scale will affect mechano-electrochemical behavior on the electrode, cell, and pack scales. Additionally, many of these active materials suffer in their cycle life due to a mechanically-driven degradation of the electrode matrix. Therefore, the focus of this …
Pseudo-Ductile 3d Printed Fiber Reinforced Polymer Composites, Shreya Vemuganti
Pseudo-Ductile 3d Printed Fiber Reinforced Polymer Composites, Shreya Vemuganti
Civil Engineering ETDs
The use of fiber-reinforced polymer (FRP) composite materials is continuously growing in civil infrastructure owing to its high strength, low weight, and manufacturing flexibility. However, FRP is characterized by sudden failure and lacks ductility. When used in construction, gradual failure of FRP components is desired to avoid catastrophic structural collapse. Due to its mechanical orthotropy, the behavior of FRP relies significantly on fiber orientation and stacking sequence. In this research proposal, investigations showed that novel multi-angled glass fiber reinforced polymer (GFRP) composites with varying fiber orientation angles, stacking sequence, and thickness of laminas can be designed and fabricated using 3D …
New Force Transducer For Mitral Valve Chordae Tendinea, Joseph Berryman
New Force Transducer For Mitral Valve Chordae Tendinea, Joseph Berryman
Biomedical Engineering Undergraduate Honors Theses
In order to inform the future of mitral valve repair and replacement, more investigation into the mechanics of the sub-valvular structure is needed. Understanding the roles of each chord during valve closure requires a sensor capable of detecting these small forces with enough sensitivity to determine the characteristics of each of the chordal types. The focus of the cantilever force transducer is to maximize this sensitivity while also minimizing the invasiveness of the sensor on the overall function of the chord. The design utilizes flexible yet strong 3D printed resin and cantilever arms to improve the strain exerted on a …
Parametric Design Of Flywheel For An Electric Punch Press, Prashant Dhakal
Parametric Design Of Flywheel For An Electric Punch Press, Prashant Dhakal
Honors Theses
Almost all designs start with a design requirement. These may be weight, volume, clearance, and even custom calculations. Finding a solution that meets these requirements often involves tedious and time-consuming iterations. Once the solution has been found, the design must be optimized to find the best possible solution. Finding the ‘best possible design’ requires substantial time and effort dedicated to iterating and analyzing the potential model solutions. This is where Parametric design comes into play. The Parametric design aids in specifying the key parameters of the design and makes changes interactively, with the model updating automatically. The purpose of this …
Jcati - Drive System, Tim Boswell
Jcati - Drive System, Tim Boswell
All Undergraduate Projects
Each year, Mechanical Engineering Technology students receive a grant from The Joint Center for Aerospace Technology Innovation (JCATI) to engineer a device that is capable of breaking down carbon fiber trimmings for recycling. The students who received the grant this year have redesigned portions of the existing system in an attempt to solve issues that have kept the system from working properly in the past. Though much collaboration between group members has been needed, each member has been responsible for their own portion of the project. The purpose of this portion of the project has been to address binding and …
Hydraulic Balsa Wood Rising Bridge, Kaitlyn Greenfield
Hydraulic Balsa Wood Rising Bridge, Kaitlyn Greenfield
All Undergraduate Projects
What is the solution to allowing tall vessels to navigate past a vehicle bridge that is less than 10 [ft] above the water? To answer this question, a balsa wood bridge was designed, constructed, and tested. The bridge needed to articulate by mechanical means, allow for travel through the bridge, and be able to withstand ample force while the main structure only being constructed of balsa wood and glue. The project was analyzed in sections. These sections include: the bridge structure and its members, the hydraulic lift, and the pins needed for the bridge and hydraulic lift to operate. The …
Articulated Balsa Wood Bridge, Isaac Chavez Ramirez
Articulated Balsa Wood Bridge, Isaac Chavez Ramirez
All Undergraduate Projects
The project chosen was the challenge of designing and constructing an articulating Balsa Wood Bridge that would withstand a minimum load of 18.9 kg. The first step was to find which design will best work for the requirements; a decision matrix has been used in this decision. Analyses were completed to find the geometry of each part that will support the load. The project construction was in sequences: the first sequence was the construction of each component, then the construction of 3 subassemblies, and finally was the construction of the entire project. The last part of the project was programming …
Nrj Rc Baja Vehicle Project - Transmission, Suspension, And Body Systems, Jeffrey Ryan Harn
Nrj Rc Baja Vehicle Project - Transmission, Suspension, And Body Systems, Jeffrey Ryan Harn
All Undergraduate Projects
Students of Central Washington University’s Mechanical Engineering technology program were tasked with designing, manufacturing, and testing a remote-controlled scale vehicle for the American Society of Mechanical Engineers (ASME) Radio-Controlled (RC) Baja Car Contest sanctioned by Remotely Operated Auto Racers (ROAR). A team of three students was assembled and responsibility over the sections of the RC vehicle were divided amongst the three students. This report focuses on the design, manufacture, testing, and evaluation of the suspension and transmission systems of the RC vehicle. A suspension tower component and transmission housing assembly were conceived to satisfy the RC suspension and transmission systems. …
Establishing Independent Tunability Of The Mechanical And Transport Properties Of Polymer Gels, Lucas Rankin
Establishing Independent Tunability Of The Mechanical And Transport Properties Of Polymer Gels, Lucas Rankin
Master’s Theses
Polymer gels can be used in the fabrication of materials for filtering liquid and gaseous media, solid-state electrolytes, and transdermal medical patches. This diverse range of applications primarily relies on the transport and mechanical properties of polymer gels. Both sets of properties have shown excellent tunability, but typically in a coupled fashion. Establishing the independent tunability of the transport and mechanical properties of polymer gels (using simple, cost-effective methods) is paramount if polymer gels are to be used to their full potential. Specifically, block copolymer gels self-assemble into organized nanoscale networks within the gel solvent, which allows for facile control …
Theoretical Design Of A 360 Degree Pendulum Ride, John William Elliott
Theoretical Design Of A 360 Degree Pendulum Ride, John William Elliott
Williams Honors College, Honors Research Projects
This project uses several areas of study: mechanical physics/design of moving parts, electrical power, and human comfort. It is based on the pendulum ride at Cedar Point called "maXair." One of the goals with this project is to create a theoretical, simpler version of a 360 Degree Pendulum Ride that operates on the same principles of a conventional pendulum rides. The velocity, forces on the shaft in the middle of the ride, the accelerations, the g force on the riders, and all the other forces associated with the pendulum ride were analyzed as well.
Vibratory Tumbling Machine, Laurence William Duclos Iii, Aaron Phillip Shein, Jared Edward Nash
Vibratory Tumbling Machine, Laurence William Duclos Iii, Aaron Phillip Shein, Jared Edward Nash
Mechanical Engineering
The purpose of this document is to highlight the overall Vibratory Tumbling Machine project background, objectives, concept design, final design, manufacturing, and design verification. This final design review outlines the process, creation, and testing of the chosen final design for this redesign of the vibratory tumbling machine. The FDR shows the steps the team took towards completing a CAD package and a verification prototype of the final design while adapting to COVID-19 restrictions.
College Of Engineering News, Georgia Southern University
College Of Engineering News, Georgia Southern University
Allen E. Paulson College of Engineering & Computing News (2012-2023)
- Engineering Programs Receive ABET Accreditation
Geometric Iteration Of A Knee Prosthetic And Static Stress-Bearing Capacity, Alexander Wheeler
Geometric Iteration Of A Knee Prosthetic And Static Stress-Bearing Capacity, Alexander Wheeler
Honors Theses
The purpose of this study was to improve a prosthetic knee model in terms of size, weight, and biocompatibility. Several tests were run to determine its effectiveness in supporting static and quasistatic loads. The positions in which these tests were run include static upright standing, static one-knee 90 degree kneeling, static squatting at maximum flexion, and quasistatic midstride. These simulations were conducted to find areas of high stress and strain. These patterns were used to determine the maximum body weight a physical prosthetic could support. The material used to create the prosthetic was changed from AISI 316 stainless steel to …
Mechanical Properties Of Permanent Foaming Fixatives For Deactivation & Decommissioning Activities, Tristan Maximilian Simoes-Ponce
Mechanical Properties Of Permanent Foaming Fixatives For Deactivation & Decommissioning Activities, Tristan Maximilian Simoes-Ponce
FIU Electronic Theses and Dissertations
The Department of Energy is investigating fixative technologies that encapsulate and/or immobilize residual contamination in voids during deactivation and decommissioning (D&D). These technologies must have adequate mechanical and adhesion properties to withstand seismic activity that may occur. One solution is the implementation of polyurethane foams used as permanent foaming fixatives (PFF), specifically intumescent foams that contain expandable graphite, making them fire resistant when exposed to extreme heat conditions.
Tensile, compression, seismic, and tensile adhesion testing was done on six commercial-off-the-self polyurethane foams to determine if the expandable graphite and other filler intumescent technologies improve its mechanical limits. It was found …
Hydronic Service Valve Product Development, Mark Hunsaker
Hydronic Service Valve Product Development, Mark Hunsaker
Construction Management
Since the inception of modern mechanical and HVAC systems, maintenance and repairs have been prevalent in both contracting and facility operations. The average life of HVAC equipment is fractional compared to the life of buildings as construction technologies improve. Traditionally, the serviceability of heating and cooling equipment has entailed the significant amounts of labor and materials to disruptively drain or freeze hydronic systems in order to cut in means of bypassing the main system, swapping out equipment, or repair. The intent of this project is to explore alternative methods to forgo the aforementioned negative impacts of service and to improve …
Adapting To Extreme Heat: Social, Atmospheric, And Infrastructure Impacts Of Air Conditioning In Megacities - The Case Of New York City, Harold Gamarro
Adapting To Extreme Heat: Social, Atmospheric, And Infrastructure Impacts Of Air Conditioning In Megacities - The Case Of New York City, Harold Gamarro
Dissertations and Theses
Extreme heat events are becoming more frequent and intense in most large cities. Built-up surfaces also limit cooling mechanisms, leading to warmer conditions in cities, a phenomenon called the Urban Heat Island (UHI). This presents major challenges to reduce adverse health effects of hot weather, particularly in vulnerable populations like the elderly and low-income communities. Here we explore the overall impacts of increasing air conditioning (AC) system adoption in residences as an adaptive measure to reduce human health risks under heat waves, with New York City (NYC) as a case study. This study uses AC adoption data from the 2017 …
Jcati Composite Delaminator, Payden Coffman
Jcati Composite Delaminator, Payden Coffman
All Undergraduate Projects
Improvements need to be made to the existing delaminator system designed to crush proprietary Boeing 777 composite material. The current design incorporates a hydraulic system to achieve the high loads needed to separate material layers. The new system will need to be able to apply the same loads while at the same time allowing for a constant feed of material through the system. To achieve this, a “gear-like” crushing system will be implemented that will apply a high enough radial load into the material that will achieve delamination equal or greater than the previous design while at the same time …
Outrigger Project, Jose Reyna, Tyler Hoffman
Outrigger Project, Jose Reyna, Tyler Hoffman
All Undergraduate Projects
Outrigger Project
Author: Jose Reyna (jose.reyna@cwu.edu)
Co-Author: Tyler Hoffman (tyler.hoffman@cwu.edu)
Mentors: Neil Hauff (hfhauff@gmail.com), Dr. Choi (Jeunghwan.choi@cwu.edu), Professor Pringle (Charles.pringle@cwu.edu), Professor Bramble (Tedman.bramble@cwu.edu), Dr. J (Craig.johnson@cwu.edu)
Abstract
Agricultural areas sometimes experience cold weather in early spring and risk damage to crops due to freezing. To combat this issue, farms can employ temporary fans to keep the blossoms from freezing. The design of a 17-foot-tall wind turbine mounted on 7-foot-wide trailer can help mix the warm air that’s above the wind turbine with the colder air that’s below to keep the crop from freezing. These wind turbines can produce …
Upper Extremity Mobility Device, Timothy J. Grassi, Jacob R. Miller
Upper Extremity Mobility Device, Timothy J. Grassi, Jacob R. Miller
Williams Honors College, Honors Research Projects
The goal of this project was to evaluate a clinical problem, explore possible solutions, and produce a functioning prototype that would conform to all the established guidelines and requirements. The project focused on developing an upper extremity mobility device for a singular client with limited muscle activity in his arms due to childhood polio. Our design process was governed by an adapted form of the FDA Design Control Process, 21 CFR 820.30 [1]. The outcome of this project was a functioning prototype that utilized the concept of a motorized pulley system remote controlled using a key fob. This research project …
Mini Baja Frame Analysis, Jacob Swanson
Mini Baja Frame Analysis, Jacob Swanson
Williams Honors College, Honors Research Projects
The purpose of our senior design project is to optimize the Baja frame to reduce its weight and material cost while keeping the required rigidity. Through force analysis we will be able to determine if any rigidity is lost by removing a set of tubes (figure 1), along with the other forces seen by the frame. If it is found that the frame rigidity is still within the determined factor of safety, 2, then we will be able to reduce the frame weight and the number of tubes that make up the frame. Along with force analysis, we will use …
Tabletop Mechanical Tester, Jamie Dombroski, Brian English, Richard Leffler, Andrew Shirk
Tabletop Mechanical Tester, Jamie Dombroski, Brian English, Richard Leffler, Andrew Shirk
Williams Honors College, Honors Research Projects
The need for hands-on and face-to-face experiences in the engineering classroom is very great. The equations, principles, and concepts can all be learned, but without the visual and tactile application, these don’t always sink in or become concrete. A small-scale tensile test machine was designed, sourced, manufactured, and tested for the purpose of being applied in classroom settings to provide this experience to engineering students. Extensive research was performed concerning tensile machines on the market, the essential elements of which are the load cell, grips, crosshead, extensometer, motor, and frame. The raw materials for the frame were purchased and drawings …