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Rc Plane Variable Wing Design, Brian Mincks, Cameron Bard, Noah Rowe
Rc Plane Variable Wing Design, Brian Mincks, Cameron Bard, Noah Rowe
Mechanical Engineering Design Project Class
Each year the AIAA (American Institute of Aeronautics and Astronautics) hosts a design competition where college teams design and fly a small, remote-controlled, battery-powered airplane. For this competition, scoring primarily depends upon the following: maximizing payload, maximizing speed, minimizing weight, minimizing wingspan. Since wingspan is a key scoring factor and variable wing geometry is allowed, our design team has decided to design a pivoting wing system that can be remotely activated immediately before and after takeoff and landing respectively.
Revealing Hemodynamic Response And Dynamic Changes In Functional Cortical Networks Using Functional Near-Infrared Spectroscopy (Fnirs), Jianwei Cao
Bioengineering Dissertations
Therapeutic interventions, such as physical therapy and non-invasive brain electrical stimulation can enhance the physical performance of persons with brain disorders. One often-used form of physical therapy named constraint-induced movement therapy (CIMT) improves motor control skills of children with cerebral palsy (CP) through forced intensive use of the affected extremity. A complementary method to physical rehabilitation methods for overcoming a deficit is to facilitate use of the affected brain areas by non-invasive brain electrical stimulation. One currently popular form of brain stimulation is transcranial direct current stimulation (tDCS), which has been shown to enhance both motor and language performance in …
Shear Behavior Of Synthetic Fiber Reinforced Concrete Box Culverts, Mahnaz Mostafazadeh
Shear Behavior Of Synthetic Fiber Reinforced Concrete Box Culverts, Mahnaz Mostafazadeh
Civil Engineering Dissertations
This research pursues a comprehensive experimental study on the shear capacity of zero-slump, dry-cast Synthetic Fiber-Reinforced Concrete (SYN-FRC) with the aim of reducing or even eliminating stirrups in box culverts. Since using stirrups in structures such as box culverts need labor work and cause reinforcement congestion, eliminating or reducing stirrups in design, prevent poor-quality concrete, help better concrete compaction and could save manufacturer time and money over the years. This study first determined the shear capacity of synthetic fiber concrete matrix by varying fiber volume fraction. Then, FEA and full experimental tests have been conducted to evaluate the effect of …
Non-Linear Analysis Of Steel Fiber Reinforced Concrete Hollow Columns Under Uniaxial Bending, Mohammed Huzaifa Ghori
Non-Linear Analysis Of Steel Fiber Reinforced Concrete Hollow Columns Under Uniaxial Bending, Mohammed Huzaifa Ghori
Civil Engineering Theses
This study investigates the performance of Steel Fiber Reinforced concrete hollow columns under axial compressive load and uniaxial bending with varying amounts of steel fiber using Finite Element Method of Analysis. The columns are of two groups, one with a 10% void and the other group has 20% void at the center. Each group’s specimens’ fiber content is varied in 0.5% increments from 0 to 1.5%. Also, the collapse load of the columns was obtained. Numerical results were compared with the available experiments. Two parametric studies were conducted by varying the amount of void percentages and steel fiber contents. In …
Experimental Study On Resilient Behavior Of Geocell-Reinforced Recycled Asphalt Pavement Base Layer: Model Development, Manikanta Saladhi
Experimental Study On Resilient Behavior Of Geocell-Reinforced Recycled Asphalt Pavement Base Layer: Model Development, Manikanta Saladhi
Civil Engineering Theses
Recycled Asphalt Material (RAP) is defined as removed and reprocessed pavement materials containing asphalt and aggregates. These materials are obtained when asphalt pavements are removed for the rehabilitation and maintenance of distressed pavements. The use of RAP as a base/subbase aggregate in pavement construction is technically and environmentally a sustainable solution, and conserve use of natural resources by requiring less virgin aggregate in pavement construction. Past studies showed that the use of 100% RAP as base course lacks shear strength and can undergo large deformations. Geocells are a system of three-dimensional, interconnected, honeycombed cellular structures that resist the lateral expansion …
Evaluation Of Plant Root On The Performance Of Evapotranspiration (Et) Cover System, Md Jobair Bin Alam
Evaluation Of Plant Root On The Performance Of Evapotranspiration (Et) Cover System, Md Jobair Bin Alam
Civil Engineering Dissertations
The performance of an evapotranspiration (ET) cover for a landfill exceeds that of a conventional landfill final cover. Its low percolation and high evapotranspiration rely on the properties of unsaturated soils, the energy demands of plants, and the atmosphere. Plant roots pull water out of the cover soil and release it into the environment, thus managing water in a much more natural way than the conventional cover, where water is controlled by creating a physical barrier. Therefore, plant roots are a significant component in the optimization of ET cover performance. In recent years, a great deal of effort has been …
Seismic Performance Of Double-Channel And Double-Hss Sections, Special Truss Moment Frame With Buckling Restrained Braces, And Long Span Special Truss Moment Frame, Chatchai Jiansinlapadamrong
Seismic Performance Of Double-Channel And Double-Hss Sections, Special Truss Moment Frame With Buckling Restrained Braces, And Long Span Special Truss Moment Frame, Chatchai Jiansinlapadamrong
Civil Engineering Dissertations
Until recently, all special truss moment frame (STMF) experimental research was done on only double angle STMFs. In order to satisfy the code seismic drift limitation, especially for mid-rise and tall multistory buildings, a large column section is needed, when double angle sections are used. However, heavy chord members can be used in this instance. Due to configuration of STMFs, the chord members in the special segment of an STMF experience higher rotational demand than the story drift. As a result, there is a need to verify large rotational capacity of other heavy steel shapes. Recent analytical investigation and experimental …
A Thermal Inertia Approach To Precision Irrigation Using Unmanned Aerial Vehicles Coupled With High-Resolution Multispectral Imagery, Kevin James Wienhold
A Thermal Inertia Approach To Precision Irrigation Using Unmanned Aerial Vehicles Coupled With High-Resolution Multispectral Imagery, Kevin James Wienhold
Civil Engineering Theses
Soil moisture is a critical variable in the optimization of irrigation scheduling in water resources management. Despite using tens to hundreds of thousands of gallons of water each day, many golf courses rely on a sparse network of point measurements to estimate irrigation requirements for turfgrass management. This study describes a novel system known as Precision Irrigation Soil Moisture Mapper (PrISMM) in which an unmanned aerial vehicle equipped with multispectral sensors is used to estimate volumetric water content (VWC) at a golf course using a thermal inertia approach. PrISMM consists of three central components, including (1) high-resolution thermal and optical …
Performance Of Light-Frame Wooden Structure (Lfws) Subjected To Combined Wind And Flood Hazards, Ajay Baniya
Performance Of Light-Frame Wooden Structure (Lfws) Subjected To Combined Wind And Flood Hazards, Ajay Baniya
Civil Engineering Theses
Light Frame Wooden Structures (LFWS), which are more prone to wind damage by virtue of their light weight, sustain severe damage when they are subjected to simultaneous flood and wind. A difficulty in Multi-hazard design for wind and flood is that the load and resistance factor make use of different design philosophies developed by different sub-disciplines. After Multi-hazard events, in most cases, it is complicated to determine the sole damage done by flood or wind alone. The load path of Wooden structure is already ambiguous, the addition of flood characteristics makes the analysis and design process more complicated. It has …
Effects Of Climatic Loading In Flexible Pavement Subgrades In Texas, Asif Ahmed
Effects Of Climatic Loading In Flexible Pavement Subgrades In Texas, Asif Ahmed
Civil Engineering Dissertations
Expansive soils, which have been reported as a worldwide problem, cover 25% of the United States. Due to the swelling and shrinkage behavior induced by moisture variations, expansive soil contributes to volumetric deformation, which in turn affects the stability and performance of structures. The Texas Department of Transportation (TxDOT) allocates 25% of its budget to pavement maintenance and repairs, much of which is triggered by expansive soil. In order to decrease the burden of this expense on maintenance authorities, it is necessary to have an accurate understanding of expansive subgrade behavior. Applying this knowledge to the pavement design and construction …
Improvements To The Duplicate Shear Tester, Yazeed Suleiman Jweihan
Improvements To The Duplicate Shear Tester, Yazeed Suleiman Jweihan
Civil Engineering Theses
Rutting in the asphalt concrete layer is a major distress in flexible pavements caused by the permanent shear deformation in asphalt mixes. The shear deformation is induced by heavy truck axis during hot summer days. Rutting affects directly the safety and users comfort. Therefore, developing of an appropriate test device for measuring the fundamental shear properties of asphalt mixes is important in order to improve the rutting resistance of asphalt mixes and pavement performance. The desired device should be simple, inexpensive, and accurate to be able to be incorporated for a quality control or quality assurance process, as well as …
Aermod Modeling Of Air Pollutant Emissions From Backup Generator Use In Lagos, Nigeria, Temitope Abayomi
Aermod Modeling Of Air Pollutant Emissions From Backup Generator Use In Lagos, Nigeria, Temitope Abayomi
Civil Engineering Theses
Generator emissions contribute to increase in air pollution. In developing countries with inadequate electricity supply, many people rely on back-up generators for long-term electricity supply. Nigeria is the second biggest importer of generators in Africa. As of 2009, it was estimated that 60 million people in Nigeria owned and operated small to medium size generators to provide electricity for their daily use. The sheer number of generators in use suggests that generator emissions are a significant source of air pollution in the country, particularly in urban cities. In this work, the concentrations of pollutants emitted from 50 generators in a …
Plasma Enhanced Chemical Vapor Deposition Coating Amorphous Silica Based Implants Enhancing Angiogenesis And Mitigating Toxic Oxidative Stress In Critical Size Bone Defects, Felipe Alves Monte
Plasma Enhanced Chemical Vapor Deposition Coating Amorphous Silica Based Implants Enhancing Angiogenesis And Mitigating Toxic Oxidative Stress In Critical Size Bone Defects, Felipe Alves Monte
Bioengineering Dissertations
The advances in bone tissue engineering search for a biomaterial that could efficiently and gradually replace the bone while the new tissue grows through the implanted structure. However, due to limitations mainly related to mechanical properties and challenges, such as the balance between tissue regeneration and material degradation, the coating of well-known inert materials still has been used in orthopedics and dental clinical practices. Bone defects are commonly related to deleterious oxidative stress induced by low oxygen levels and inflammation. Toxic oxidative stress can impair damaged tissue healing due to inhibiting new blood vessels and new bone formation. The interaction …
A Standard Tensile Testing Procedure For Fiber-Reinforced Concrete (Frc) And Ultra-High-Performance Fiber-Reinforced Concrete (Uhp-Frc) Based On Double Punch Test (Dpt), Shuveksha Tuladhar
A Standard Tensile Testing Procedure For Fiber-Reinforced Concrete (Frc) And Ultra-High-Performance Fiber-Reinforced Concrete (Uhp-Frc) Based On Double Punch Test (Dpt), Shuveksha Tuladhar
Civil Engineering Theses
Current test methods such as ASTM 1609, ASTM 1550 and direct tensile test are used for evaluating the mechanical properties of Fiber Reinforced Concrete (FRC) and to determine the quality of mixture in design and construction practice. These test methods show high variability in the results, requires large specimen and complicated test setup. An ideal material test method for FRC should give consistent results in determining mechanical properties such as peak strength and residual strengths. Moreover, current test methods are expensive and time-consuming as more specimens are needed to acquire reliable test results. Double Punch Test (DPT) is a simple, …
Development Of A Production Estimation Model For Tunnel Boring Machines (Tbms), Saeed Janbaz
Development Of A Production Estimation Model For Tunnel Boring Machines (Tbms), Saeed Janbaz
Civil Engineering Dissertations
Advance rate (AR) estimation is a crucial factor at the conceptual phase of a tunneling project for preliminary estimation of tunnel boring machines' (TBMs') usage. The primary objective of this research is to develop order of magnitude performance charts for advance rate of TBMs that can be used using the limited information about the tunneling progress at the conceptual phase. The secondary objective of this dissertation is to evaluate factors that impact TBM progress in large diameter applications. Tunnel diameter and uniaxial compressive strength of ground are found to be some of the primary parameters for prediction of advance rate. …
Non-Destructive Evaluation Of Soil Moisture In Evapotranspiration Cover System, Md Ishtiaque Hossain
Non-Destructive Evaluation Of Soil Moisture In Evapotranspiration Cover System, Md Ishtiaque Hossain
Civil Engineering Dissertations
A conventional landfill cover system is designed as a barrier layer system, with low hydraulic conductivity, to minimize the percolation of water from the cover to the waste. Evapotranspiration (ET) covers are currently becoming a popular alternative that are acceptable to landfill authorities, due to their cost effectiveness and nature-friendly performance. The principle function of the ET cover is to store the infiltrated water, using the water balance technique, until it is transpired by plants into the atmosphere, thus minimizing percolation. The performance of the final cover system is assessed by monitoring the soil moisture in the ET cover and …
Quantitative Non-Destructive Evaluation (Nde) Of Frp Laminate-Concrete Bond Strength, Mina Riad
Quantitative Non-Destructive Evaluation (Nde) Of Frp Laminate-Concrete Bond Strength, Mina Riad
Civil Engineering Dissertations
Repair and rehabilitation methods for civil infrastructure have become a topic of great interest to engineers. Fiber Reinforced Polymer (FRP) is considered as one of the most popular and practical solutions for strengthening and retrofitting of civil infrastructure. Several past studies indicated that significant increase in strength and stiffness can be achieved by using this technology. The FRP-concrete interface bond is critical in transferring stresses from the concrete surface to the FRP. However, the evaluation of the bond strength is still a challenging issue. To evaluate the bond strength using non-destructive techniques, 32 concrete beams strengthened with FRP using different …
Fatigue Impacts On Hdpe Pipe Material Properties, Marjan Shahrokh Esfahani
Fatigue Impacts On Hdpe Pipe Material Properties, Marjan Shahrokh Esfahani
Civil Engineering Dissertations
During a pipe’s life cycle, failures occur due to numerous factors such as age, loading conditions, environmental conditions, installation quality, manufacturing procedures, operation and maintenance strategies and so on. Frequent pressure surges or fluctuations in a piping system may cause a fatigue failure as fatigue is one of the most important issues in water pipes due to water hammer impacts. Application of buried High Density PolyEthylene (HDPE) water pipelines has significantly increased in recent years, and PE4710 is a new member of HDPE family. So, there is not yet enough information about PE4710 long-term performance. Due to lack of enough …
Space Launch Vehicle Design: Conceptual Design Of Rocket Powered, Vertical Takeoff, Fully Expendable And First Stage Boostback Space Launch Vehicles, David Michael Woodward
Space Launch Vehicle Design: Conceptual Design Of Rocket Powered, Vertical Takeoff, Fully Expendable And First Stage Boostback Space Launch Vehicles, David Michael Woodward
Mechanical and Aerospace Engineering Theses
Engineering design can be broken down into three phases: conceptual design, preliminary design, and detailed design. During the conceptual design phase, several potential configurations are studied towards the identification of the baseline vehicle. Although the least amount of detail is known about the design during the early conceptual design phase, the decisions made during this phase lock in major features effecting life-cycle cost and overall product success. As the next big space race begins, it is critically important to have a readily available tool for launch vehicle designers that is intuitive to use, easy to modify, cost effective, and provides …
A Methodology For Topology And Lattice Structure Optimization Of A Cargo Drone Motor Mount, Nagadurga Srinivas Sripada
A Methodology For Topology And Lattice Structure Optimization Of A Cargo Drone Motor Mount, Nagadurga Srinivas Sripada
Mechanical and Aerospace Engineering Theses
This work discusses a CAE driven methodology for designing a lightweight component by performing structural configuration on a given package space, creating a closed surface along this configuration using an interactive geometric modeling tool, and lastly generating lattice members that provide the required stiffness for the structure. The design process is explained starting with topology optimization performed on a single block with specific design constraints. It describes the effect of different parameters on the optimized results and how to analyze these results based on a given volume fraction constraint with the objective of minimizing the compliance. It then talks about …
Region Based Convolutional Neural Networks For Object Detection And Recognition In Adas Application, Sachit Kaul
Region Based Convolutional Neural Networks For Object Detection And Recognition In Adas Application, Sachit Kaul
Mechanical and Aerospace Engineering Theses
Object Detection and Recognition using Computer Vision has been a very interesting and a challenging field of study from past three decades. Recent advancements in Deep Learning and as well as increase in computational power has reignited the interest of researchers in this field in last decade. Implementing Machine Learning and Computer Vision techniques in scene classification and object localization particularly for automated driving purpose has been a topic of discussion in last half decade and we have seen some brilliant advancements in recent times as self-driving cars are becoming a reality. In this thesis we focus on Region based …
Reliability Assessment Of Solder Joint Using Bga Package – Megtron 6 Versus Fr4 Printed Circuit Boards Using Drop Testing, Pradnya Chandrakant Mundhe
Reliability Assessment Of Solder Joint Using Bga Package – Megtron 6 Versus Fr4 Printed Circuit Boards Using Drop Testing, Pradnya Chandrakant Mundhe
Mechanical and Aerospace Engineering Theses
In electronic industry Ball grid array (BGA) package, surface mount technology has been used widely, due to its robust design, high density connections and improved performance. In surface mount technology, solder joints are used to interconnect package and PCB board assembly. High frequency laminates use in PCB boards provides excellent performance for high speed, frequency devices. Nelco 4000-13EPSI, Panasonic Megtron 6, and Rogers 4350B are few popular laminates. Component size reduction and structural complexity because of increasing number of transistors are making it very difficult to protect the packages from mechanical, thermal, and electrical damage. Difference in material properties between …
Computational Model For Steady State Simulation Of A Solid Oxide Fuel Cell (Sofc) Planar Stack Model Undergoing Reforming Process, Vaibhav Vijay Indulkar
Computational Model For Steady State Simulation Of A Solid Oxide Fuel Cell (Sofc) Planar Stack Model Undergoing Reforming Process, Vaibhav Vijay Indulkar
Mechanical and Aerospace Engineering Theses
Solid Oxide Fuel Cell (SOFC), is a clean and low-pollution technology of generating power of high efficiency. Its applicability for both stationery and transportation power generation systems, adaptability for wide range fuel sources, as wells its process of direct conversion of fuel to energy make it an important source of power generation. An effective design of sub-systems or individual components play a key role in overall working of a plant. Thus, critical analysis at the component level is of importance for the overall plant efficiency. In the present study a heat transfer model of a planar SOFC stack to be …
Strength And Damage Prognosis Of Adhesive Bond And Inter-Ply Hybrid Composites Based On Dielectric Properties, Priyanshu K. Banerjee
Strength And Damage Prognosis Of Adhesive Bond And Inter-Ply Hybrid Composites Based On Dielectric Properties, Priyanshu K. Banerjee
Mechanical and Aerospace Engineering Theses
Composite materials have found their applications in a wide range of industries particularly in the aerospace and automotive sectors. This is because they are comparatively light-weight and provide a much better corrosion and wear resistance as compared to other ceramics and metals. Adhesive bonding can be used to improve the stress distribution between these composite materials. Moreover, adhesive bond decreases the weight and concentration of stresses in the structure. Broadband Dielectric Spectroscopy, BbDS is a robust tool used for analyzing the dielectric properties of a polymer composite. This method can be used to monitor the curing process of the specimen. …
Reliability Assessment Of Solder Joint Interconnects Of Bga Package-Megtron Series Under Power Cycling, Mahesh Pallapothu
Reliability Assessment Of Solder Joint Interconnects Of Bga Package-Megtron Series Under Power Cycling, Mahesh Pallapothu
Mechanical and Aerospace Engineering Theses
Solder joint interconnects are the second level assembly in surface mount interconnection technology. Mismatch in the coefficient of thermal expansion (CTE) between package and substrate or PCB creates failure in solder joints such as excessive warpage, low-k dielectric cracking, solder mask cracking and bump cracking. Conventional accelerated thermal cycling tests are performed to evaluate the Solder Joint Reliability (SJR). But, in everyday application, the package is subjected to Power cycling. Power cycling is the phenomenon where the package experiences non-uniform temperature distribution in the package with the chip as an internal heat generating source when an electronic device is turned …
A Comparative Study Of Wooden And Hyrbid Composite Crossarms Of An Electric Utility Pole, Rohit Avadhani
A Comparative Study Of Wooden And Hyrbid Composite Crossarms Of An Electric Utility Pole, Rohit Avadhani
Mechanical and Aerospace Engineering Theses
Most of the cross arms in the country are made from wood. Wood, although easily accessible, has its own defects. Environmental effects which includes the expansion and contraction of wood over the years which will disrupt its structural integrity, the presence of termites and other insects which dig into wood and destroy it from the inside, Materials wastage when it comes to improving the structural strength by increasing the cross-sectional thickness and height The replacement of wood with composites seems like a logical idea and also a solution to most of the problems. The applications of composites in our day …
Effect Of Solder Voids And Distance To Neutral Point (Dnp) On Sjr Of Wcsp Under Reflow Condition And Thermal Cycling, Aniruddha Doiphode
Effect Of Solder Voids And Distance To Neutral Point (Dnp) On Sjr Of Wcsp Under Reflow Condition And Thermal Cycling, Aniruddha Doiphode
Mechanical and Aerospace Engineering Theses
Since the introduction of Chip Scale Packages (CSP’s) in the early 2000s, they have become one of the biggest packaging trends in recent history. There are currently over 50 different types of CSP’s available throughout the industry and the numbers are increasing almost daily. Wafer Level Chip Scale Package’s (WCSP) is kind of CSP’s used widely due to its small form factor which offers efficient use of limited space and miniaturization of the electronic device. On the other hand, small form factor typically incurs greater initial cost in product design and development. In an electronic device, it is equally important …
Effective Thermal Conductivity Of Porous Media By Inverse Heat Transfer Analysis, Oscar Javier Ii Fabela
Effective Thermal Conductivity Of Porous Media By Inverse Heat Transfer Analysis, Oscar Javier Ii Fabela
Mechanical and Aerospace Engineering Theses
This research describes the application of inverse analysis to estimate the thermal conductivity of a porous material using temperature measurements at the surfaces. Finite volume analysis code is implemented in MATLAB and it is utilized to solve the steady state, axisymmetric heat transfer governing energy equation. The analysis code is coupled with a numerical optimization method and utilized to predict thermal conductivity using the measurements. An experimental setup was developed to test a porous media composed of a mixture of small pellets and air. In experiments, temperature is measured at outer surface of copper tube. These data, serves as input …
Pseudo-Spectral Methods Based Real-Time Optimal Path Planning For Unmanned Ground Vehicles, Denish Kamleshkumar Baman
Pseudo-Spectral Methods Based Real-Time Optimal Path Planning For Unmanned Ground Vehicles, Denish Kamleshkumar Baman
Mechanical and Aerospace Engineering Theses
Real-time optimal trajectory design and tracking for autonomous ground vehicles are maturing technologies with the potential to advance mobility by enhancing time and energy efficiency in application such as indoor surveillance robots or planetary exploration rovers. Pseudo-spectral methods based trajectory generation framework provides the desired trajectory which minimizes a prescribed objective function (i.e. minimum time, acceleration, and energy) while satisfying kinodynamics and various types of constraints (i.e. obstacle avoidance and smooth turning at waypoint transitions). In this thesis cyber-physical system architecture is used for the communication between rover-vehicle and the ground station. By using optimal state and control vector from …
Multiphase Flow Modeling And Analysis Of Phased Filling Process For Pulsed Detonation Engine, Nirmal Kumar Umapathy
Multiphase Flow Modeling And Analysis Of Phased Filling Process For Pulsed Detonation Engine, Nirmal Kumar Umapathy
Mechanical and Aerospace Engineering Theses
Filling of reactants into a pulsed detonation engine (PDE) should be carried out quickly because any lengthening of the fill time will lead to an increased cycle time. The fill process and, the purge process constitutes a large proportion of time in a cycle. The purpose of this research was to improve the time of fill by implementing various injection geometries in two injection schemes with five different premixed stoichiometric fuel-air mixture injected at wide range of velocity. The different configurations examined were end wall injection, side wall injection with ports angled and normal to the flow direction and staggered …