Ratcheting Limit Assessment Of Straight Pipes Subjected To Combinedinternal Pressure And Reversed Bending Moments.Pdf, 2016 Wuhan Institute of Technology
Ratcheting Limit Assessment Of Straight Pipes Subjected To Combinedinternal Pressure And Reversed Bending Moments.Pdf, Xiaotao Zheng
Experimental Building Demonstration Model With Viscous Fluid Dampers, 2016 California Polytechnic State University, San Luis Obispo
Experimental Building Demonstration Model With Viscous Fluid Dampers, Blake Thomas Reeve, Brianna Jean Kufa, Aden Malek Stepanians, Sophie Carmion Ratkovich
The Architectural Engineering major places a heavy emphasis on structural dynamics and the role of wind and seismic loading in building analysis and design. Buildings of high importance that are critical to community function, such as hospitals, often utilize supplemental damping devices like supplemental viscous fluid dampers or base isolators to reduce the overall demands on the structural system. The design and analysis of these dampers are typically not taught at the undergraduate level, and is frequently performed by mechanical engineers, in lieu of structural engineers.
To better understand and research building behavior with supplemental damping devices, our multi-disciplinary team ...
Ultra-Light Bear Canister, 2016 California Polytechnic State University, San Luis Obispo
Ultra-Light Bear Canister, Naveen Beasley, Eli Rogers, Cory Wilson, Donald Wood
A bear canister is the primary tool used by outdoor enthusiasts to protect their food from bears while camping or backpacking. There are many effective products currently on the market, however many are not designed with reduced weight in mind. Hardcore backpackers want to have the lightest gear possible to ease the strain of carrying a large pack for sometimes weeks at a time.
Current bear canisters exist that utilize carbon fiber for weight reduction, however they rely on stock carbon tubes and lack engineering analysis, and no competitor has a fully composite bear canister available. Our sponsor, Nick Hellewell ...
Finite Element Modeling Of Delamination Damage In Carbon Fiber Laminates Subject To Low-Velocity Impact And Comparison With Experimental Impact Tests Using Nondestructive Vibrothermography Evaluation, 2016 California Polytechnic State University, San Luis Obispo
Finite Element Modeling Of Delamination Damage In Carbon Fiber Laminates Subject To Low-Velocity Impact And Comparison With Experimental Impact Tests Using Nondestructive Vibrothermography Evaluation, George Rodriguez Iv
Master's Theses and Project Reports
Carbon fiber reinforced composites are utilized in many design applications where high strength, low weight, and/or high stiffness are required. While composite materials can provide high strength and stiffness-to-weight ratios, they are also more complicated to analyze due to their inhomogeneous nature. One important failure mode of composite structures is delamination. This failure mode is common when composite laminates are subject to impact loading.
Various finite element methods for analyzing delamination exist. In this research, a modeling strategy based on contact tiebreak definitions in LS-DYNA®was used. A finite element model of a low-velocity impact event was created to ...
Particle Image Velocimetry Design & Installation, 2016 University of Arkansas, Fayetteville
Particle Image Velocimetry Design & Installation, Zach Ritchie
Mechanical Engineering Undergraduate Honors Theses
This work will mainly focus on the design, construction, and installation of the Particle Image Velocimetry (PIV) system in the Chemical Hazards Research Center wind tunnel. The PIV system utilizes a Class IV (double pulsed) laser, optics to produce a light sheet, timing circuitry, and a high-resolution camera (with buffered output) to measure a system’s velocity (two-dimensional) field by determining the displacement of particles over the time between laser pulses. For maximum mobility and functionality, the PIV system was installed in the center of the tunnel on a moveable cart with the laser and camera mounted to an adjustable ...
Inter-Droplet Membranes For Mechanical Sensing Applications, 2016 University of Tennessee - Knoxville
Inter-Droplet Membranes For Mechanical Sensing Applications, Nima Tamaddoni Jahromi
This dissertation combines self-assembly phenomena of amphiphilic molecules with soft materials to create and characterize mechanoelectrical transducers and sensors whose sensing elements are thin-film bioinspired membranes comprised of phospholipids or amphiphilic polymers. We show that the structures of these amphiphilic molecules tune the mechanical and electrical properties of these membranes. We show that these properties affect the mechanoelectrical sensing characteristic and range of operation of these membrane transducers. In the experiments, we construct and characterize a membrane-based hair cell embodiment that enables the membrane to be responsive to mechanical perturbations of the hair. The resulting oscillations of membranes formed between ...
Drag Reduction Using Femtosecond Laser Surface Processing: Experimental Setup, 2016 University of Nebraska - Lincoln
Drag Reduction Using Femtosecond Laser Surface Processing: Experimental Setup, Derek Wallin, Henry Ems, Craig Zuhlke, Dennis R. Alexander, George Gogos, Sidy Ndao
UCARE Research Products
The experimental setup for developing a system to test the drag effects of different superhydrophorbicities. This is used to revise the current Moody Chart and redefine fluid drag in a pipe.
Fluid drag reduction is important in many applications such as reducing the power requirement to pump a fluid through a channel or pipe. The Center for Electro-Optics and Functionalized Surfaces (CEFS) at the University of Nebraska – Lincoln uses a femtosecond laser to functionalize 304 stainless Steel to become superhydrophilic or superhydrophobic The Processing produces microscale and nanoscale surface roughness that when treated with siloxanes becomes superhydrophobic. Small vortices form ...
Application Of A Multi-Zone Model For The Prediction Of Species Concentrations In Rapid Compression Machine Experiments, David Wilson
Master's Theses (2009 -)
Accurate chemical kinetic models, which predict species evolution and heat release rates in chemically reactive systems, are essential for further advancements in fuel and combustion technology. An experimental facility that is widely used for evaluating the accuracy of kinetic models is a rapid compression machine (RCM), which creates a well-defined reaction environment by compressing a reactive mixture inside a chamber. Generally, RCM experiments are conducted in order to obtain ignition delay data. However, chemical speciation data provides greater insight into reaction pathways, and is therefore a more rigorous benchmark for validating kinetic models. In order for a chemical kinetic model ...
The University Of Akron Nfpa 2015/2016 Chainless Challenge, 2016 University of Akron
The University Of Akron Nfpa 2015/2016 Chainless Challenge, Andrew Tupta, Andrew Ball, Stefan Stamboldziev, Jordon Spence, Sean Catchpole
Honors Research Projects
Parker Hannifin has issued a challenge to student design teams of creating a Chainless bike using a hydraulic system. Each student design team will be assigned a technical advisor from the University. The project will be divided into two phases after the initial kickoff. The first phase will align with senior design course for motion control and hydraulics and will yield the student obtaining knowledge in hydraulics, including bio-degradable fluids, pneumatics, electromechanical systems, green technologies (sustainable energy) and controlling force and motion. Students will be provided data sheets, a list of in-stock Parker components and by the end of the ...
Biventricular Finite Element Modeling And Quantification Of 3d Langragian Strains And Torsion Using Dense Mri, 2016 University of Kentucky
Biventricular Finite Element Modeling And Quantification Of 3d Langragian Strains And Torsion Using Dense Mri, Zhanqiu Liu
Theses and Dissertations--Mechanical Engineering
Statistical data suggests that increased use of evidence-based medical therapies has largely contributed to the decrease in American death rate caused by heart disease. And my studies are about two applications of magnetic resonance imaging (MRI) as a non-invasive approach in evidence-based health care research. In my first study, the achievement of a pulmonary valve replacement surgery was assessed on a patient with tetralogy of Fallot (TOF). In order to evaluate the remodeling of right ventricle, two biventricular finite element models were built up for pre-surgical images and post-surgical images. In my second study, 3D Lagrangian strains and torsion in ...
Modeling Time-Dependent Performance Of Submerged Superhydrophobic Or Slippery Surfaces, 2016 firstname.lastname@example.org
Modeling Time-Dependent Performance Of Submerged Superhydrophobic Or Slippery Surfaces, Ahmed A. Hemeda
Theses and Dissertations
The goal of this study is to quantify the transient performance of microfabricated superhydrophobic surfaces when used in underwater applications. A mathematical framework is developed and used to predict the stability, longevity, and drag reduction benefits of submerged superhydrophobic surfaces with two- or three-dimensional micro-textures. In addition, a novel design is proposed to improve the drag-reduction benefits of lubricant-infused surfaces, by placing a layer of trapped air underneath the lubricant layer. The new design is referred to as lubricant–infused surfaces with trapped air, and it is designed to eliminate the long-lasting longevity problem of submerged superhydrophobic surfaces. The effectiveness ...
Restraint System Design And Evaluation For Military Specific Applications, 2016 Michigan Technological University
Restraint System Design And Evaluation For Military Specific Applications, Sebastian Karwaczynski
Dissertations, Master's Theses and Master's Reports
This research focuses on designing an optimal restraint system for usage in a military vehicle applications. The designed restraint system must accommodate a wide range of DHM’s and ATD’s with and without PPE such as: helmet, boots, and body armor. The evaluation of the restraint systems were conducted in a simulated vehicle environment, which was utilized to downselect the ideal restraint system for this program.
In December of 2011 the OCP TECD program was formulated to increase occupant protection. To do this, 3D computer models were created to accommodate the entire Soldier population in the Army. These models ...
Suspension For Electrathon Vehicle, 2016 Central Washington University
Suspension For Electrathon Vehicle, Mackenzie Ericson Angeledes
All Undergraduate Projects
The purpose of this project was to develop a rear suspension system to support the frame of an Electrathon Vehicle. The vehicle is designed to compete in the Electrathon America competition on behalf of the Central Washington University Electric Vehicle Club. The suspension system was designed to use readily available parts sourced from manufacturers to keep the components serviceable. Using dynamic and static engineering analysis (spring equations, equations of equilibrium, stress calculations), the necessary custom components were designed. Space restrictions and limitations of the preexisting frame necessitated modifications, such as the straightness of the frame and the positioning of existing ...
Hydraulic Sprayer Boom Upgrade, 2016 Central Washington University
Hydraulic Sprayer Boom Upgrade, Chad R. Omlin
All Undergraduate Projects
Title and Author: Agriculture sprayer hydraulic boom upgrade by Chad Omlin (engineering Technologies, Safety, and Construction)
Abstract: Today’s agriculture industry is all about being the most efficient with your time, land, employees, and machinery. One thing that has made farming more efficient has been the use of hydraulics. Having a sprayer unit with manual booms is not being efficient with your time and/or employees. To make the sprayer unit more efficient, hydraulic cylinders were added. Sketched solutions were analyzed using statics and mechanics of materials principles. Drawings were completed for the successful analysis solutions. Solid works software was ...
Orchard Bin Atv Trailer, 2016 Central Washington University
Orchard Bin Atv Trailer, Neil F. Leitz
All Undergraduate Projects
A local orchardist was experiencing a problem that was being caused by their lack of apple picking bin moving equipment. The orchardist needed a well-engineered solution to this lack of equipment. The solution arrived at was a five bin trailer. There were multiple design requirements for this trailer, including the device needing to be able to interface with an ATV, be able to be loaded by hand, be able to carry five bins, and not exceed a budget of $750. While perfecting the design of the trailer, a number of different disciplines were utilized, which included dynamics, kinematics, static loading ...
Applied Strength Of Materials For Engineering Technology, 2016 Indiana University - Purdue University Fort Wayne
Applied Strength Of Materials For Engineering Technology, Barry Dupen
Manufacturing and Construction Engineering Technology Faculty Publications
No abstract provided.
Determination Of Rejected Landing Roll Runway Point-Of-No-Return And Go-Around In Transport Category Airplanes, 2016 AAR Aerospace Consulting, LLC
Determination Of Rejected Landing Roll Runway Point-Of-No-Return And Go-Around In Transport Category Airplanes, Nihad E. Daidzic, Ph.D., Sc.D.
International Journal of Aviation, Aeronautics, and Aerospace
The decelerate-accelerate-takeoff maneuver in transport category airplanes has been discussed. Mathematical model based on total energy conservation has been used to calculate the rejected landing point-of-no-return on a runway which will still enable the airplane to safely execute go-around and achieve regulatory screen heights and takeoff safety speeds. After this point has been exceeded or below the point-of-no-return speed no go-around should ever be considered. Landing long and fast and/or decelerating on slippery runways may very well result in an overrun which could be prevented if the go-around is attempted before reaching this critical runway point. The point-of-no-return on ...
Design Principles For A Family Of Direct-Drive Legged Robots, 2016 University of Pennsylvania
Design Principles For A Family Of Direct-Drive Legged Robots, Gavin Kenneally, Avik De, D. E. Koditschek
Departmental Papers (ESE)
This letter introduces Minitaur, a dynamically running and leaping quadruped, which represents a novel class of direct-drive (DD) legged robots. We present a methodology that achieves the well-known benefits of DD robot design (transparency, mechanical robustness/efficiency, high-actuation bandwidth, and increased specific power), affording highly energetic behaviors across our family of machines despite severe limitations in specific force. We quantify DD drivetrain benefits using a variety of metrics, compare our machines' performance to previously reported legged platforms, and speculate on the potential broad-reaching value of “transparency” for legged locomotion.
For more information: Kod*lab.
Visual Servoing Of Quadrotors For Perching By Hanging From Cylindrical Objects, 2016 University of Pennsylvania
Visual Servoing Of Quadrotors For Perching By Hanging From Cylindrical Objects, Justin Thomas, Giuseppe Loianno, Kostas Daniilidis, Vijay Kumar
Departmental Papers (MEAM)
This paper addresses vision-based localization and servoing for quadrotors to enable autonomous perching by hanging from cylindrical structures using only a monocular camera. We focus on the problems of relative pose estimation, control, and trajectory planning for maneuvering a robot relative to cylinders with unknown orientations. We first develop a geometric model that describes the pose of the robot relative to a cylinder. Then, we derive the dynamics of the system, expressed in terms of the image features. Based on the dynamics, we present a controller which guarantees asymptotic convergence to the desired image space coordinates. Finally, we develop an ...
Underwater Rope Fatigue Testing Machine, 2015 California Polytechnic State University - San Luis Obispo
Underwater Rope Fatigue Testing Machine, Napoleon Nino, Andrew Pimentel
The design and fabrication of an underwater rope fatigue testing machine meant to simulate the effects of an oceanic environment and the effects on rope.