Standardized 1x6u Cubesat Structure Design,
2021
Western Michigan University
Standardized 1x6u Cubesat Structure Design, Maximilian H. Brummel
Masters Theses
A CubeSat is a small satellite composed of one or more 10cm x 10cm x ~10cm cubes. Sometimes referred to as a “U” as in unit, the cubes can be combined in configurations of 2U, 3U, 6U, and more. CubeSats provide many advantages that larger satellites cannot offer. They are relatively inexpensive and can be fabricated much faster. Small-scale projects that require a fast timeline from conception up to completion are perfect for CubeSats. Furthermore, educational programs use CubeSat projects to teach and prepare students for the satellite industry. Popular configurations for CubeSat are 1U, 3U and 6U where the …
Flutter Suppression By Active Controller Of A Two-Dimensional Wing With A Flap,
2021
United Arab Emirates University
Flutter Suppression By Active Controller Of A Two-Dimensional Wing With A Flap, Abdallah Tarabulsi
Theses
Flutter is a divergent oscillation of an aeroelastic structure, and one of a family of aeroelastic instability phenomena, that results from the interaction of elastic and inertial forces of the structure with the surrounding aerodynamic forces. Airfoil Flutter is important due to its catastrophic effect on the durability and operational safety of the structure. Traditionally, flutter is prevented within an aircraft's flight envelope using passive approaches such as optimizing stiffness distribution, mass balancing, or modifying geometry during the design phase. Although these methods are effective but they led to heavier airfoil designs. On the other hand, active control methods allow …
Additive Manufacturing Of Stainless Steel -- Copper Functionally Graded Materials Via Inconel 718 Interlayer,
2021
Missouri University of Science and Technology
Additive Manufacturing Of Stainless Steel -- Copper Functionally Graded Materials Via Inconel 718 Interlayer, Xinchang Zhang, Lan Li, Frank W. Liou
Mechanical and Aerospace Engineering Faculty Research & Creative Works
The joining of dissimilar materials is becoming increasingly prevalent to integrate different material properties to enhance design flexibility and overall performance. This study introduced an innovative approach to additively manufacture copper on 316L stainless steel (SS316L) via Inconel 718 interlayers using directed energy deposition (DED). The novel multi-material structure was studied both experimentally and theoretically. The microstructure, tensile properties, microhardness, and thermal performance of the structure were characterized. Residual stress distribution over the structure was revealed by experimental-validated numerical modeling. The result exhibits that defect-free structures with excellent interfacial bonding can be achieved by introducing Inconel 718 interlayers. The bonding …
Investigation Of The Prevalence Of Faults In The Heating, Ventilation, And Air-Conditioning Systems Of Commercial Buildings,
2021
University of Nebraska-Lincoln
Investigation Of The Prevalence Of Faults In The Heating, Ventilation, And Air-Conditioning Systems Of Commercial Buildings, Amir Ebrahimifakhar
Durham School of Architectural Engineering and Construction: Dissertations, Thesis, and Student Research
This dissertation describes a large-scale investigation of heating, ventilation, and air-conditioning (HVAC) fault prevalence in commercial buildings in the United States. A multi-year dataset with 36,556 pieces of HVAC equipment including air handling units (AHUs), air terminal units (ATUs), and packaged rooftop units (RTUs) was analyzed to determine values for several HVAC fault prevalence metrics. The primary source of data for this study comes from three commercial fault detection and diagnostics (FDD) providers. Since each FDD provider uses different terms to refer to the same fault in an HVAC system, a mapping function was created for each FDD provider’s dataset, …
Feasibility Study Of Cold Ironing From Renewable Sources In The Nordic Region: Case Study : Port Of Kapellskär In Stockholm,
2021
World Maritime University
Feasibility Study Of Cold Ironing From Renewable Sources In The Nordic Region: Case Study : Port Of Kapellskär In Stockholm, Aymen Abdaoui
World Maritime University Dissertations
No abstract provided.
Theoretical Bases Of Diagnostics Of Radiators By Heat Load Of Passenger Cars,
2021
Fergana Polytechnic Institute
Theoretical Bases Of Diagnostics Of Radiators By Heat Load Of Passenger Cars, U R. Salomov, D A. Moydinov, S M. Yusupov
Scientific-technical journal
This article presents the technical characteristics of the phenomena occurring in the radiator pipes under the influence of the thermal regime of mechanisms determined by the technical condition of the cooling system components of cars with internal combustion engines.
Using High-Speed Imaging And Machine Learning To Capture Ultrasonic Treatment Cavitation Area At Different Amplitudes,
2021
Department of Mechanical and Materials Engineering, Florida International University
Using High-Speed Imaging And Machine Learning To Capture Ultrasonic Treatment Cavitation Area At Different Amplitudes, Brandon Aguiar, Paul G. Bianco, Arvind Agarwal
2022 MME Undergraduate Research Symposium
The ultrasonic treatment process strengthens metals by increasing nucleation and decreasing grain size in an energy efficient way, without having to add anything to the material. The goal of this research endeavor was to use machine learning to automatically measure cavitation area in the Ultrasonic Treatment process to understand how amplitude influences cavitation area. For this experiment, a probe was placed into a container filled with turpentine because it has a similar viscosity to liquid aluminum. The probe gyrates up and down tens of micrometers at a frequency of 20 kHz, which causes cavitations to form in the turpentine. Each …
Facilitated Release Of Doxorubicin From Biodegradable Mesoporous Silica Nanoparticles,
2021
Department of Biomedical Engineering, Florida International University
Facilitated Release Of Doxorubicin From Biodegradable Mesoporous Silica Nanoparticles, Melissa Venedicto, Cheng-Yu Lai
2022 MME Undergraduate Research Symposium
Cervical cancer is one of the most common causes of cancer death for women in the United States. The current treatment with chemotherapy drugs has significant side effects and may cause harm to healthy cells rather than cancer cells. In order to combat the potential side effects, nanoparticles composed of mesoporous silica were created to house the chemotherapy drug doxorubicin (DOX). The silica network contains the drug, and a pH study was conducted to determine the conditions for the nanoparticle to disperse the drug. The introduction of disulfide bonds within the nanoparticle created a framework to efficiently release 97% of …
Nanomechanical Properties Of Engineered Cardiomyocytes Under Electrical Stimulation,
2021
Department of Mechanical and Materials Engineering, Florida International University
Nanomechanical Properties Of Engineered Cardiomyocytes Under Electrical Stimulation, Lia Paolino, Lihua Lou, Alberto Sesena Rubfiaro, Jin He, Arvind Agarwal
2022 MME Undergraduate Research Symposium
Engineered cardiomyocytes made of human-induced pluripotent stem cells (iPSC) present phenotypical characteristics similar to human fetal cardiomyocytes. There are different factors that are essential for engineered cardiomyocytes to be functional, one of them being that their mechanical properties must mimic those of adult cardiomyocytes. Techniques, such as electrical stimulation, have been used to improve the extracellular matrix's alignment and organization and improve the intracellular environment. Therefore, electrical stimulation could potentially be used to enhance the mechanical properties of engineered cardiac tissue. The goal of this study is to establish the effects of electrical stimulation on the elastic modulus of engineered …
Optimization Of Dlp 3d Printed Ceramic Parts,
2021
Department of Mechanical and Materials Engineering, Florida International University
Optimization Of Dlp 3d Printed Ceramic Parts, Samuel Ovalle, E. Viamontes, Tony Thomas
2022 MME Undergraduate Research Symposium
Digital Light Processing (DLP) 3D printing allows for the creation of parts with advanced engineering materials and geometries difficult to produce through conventional manufacturing techniques. Photosensitive resin monomers are activated with a UV-producing LCD screen to polymerize, layer by layer, forming the desired part. With the right mixture of photosensitive resin and advanced engineering powder material, useful engineering-grade parts can be produced. The Bison 1000 is a research-grade DLP printer that permits the user to change many parameters, in order to discover an optimal method for producing 3D parts of any material of interest. In this presentation, the process parameter …
Flash Sintering Of Commercial Zirconium Nitride Powders,
2021
Department of Mechanical and Materials Engineering, Florida International University
Flash Sintering Of Commercial Zirconium Nitride Powders, Diego Dubois, Amirali Eskandariyun, Suprabha Das, Andriy Durygin, Zhe Cheng
2022 MME Undergraduate Research Symposium
Flash sintering is an electrical field-assisted densification technique that requires passing a current through a ceramic powder compact. Pressure-assisted flash sintering of commercially available Zirconium Nitride (ZrN) powders has been demonstrated. Near fully dense samples can be obtained within a short period of time. The influences of parameters such as electrical field strength, voltage ramping rate, current limit, external pressure, pre-heating, and holding time on the onset of the flash event were investigated. Some post-flash sintered samples were subjected to the same condition to observe if the material would experience repeated flash. In addition, material properties such as density and …
Aerodynamic Shape Multi-Objective Optimization For Sae Aero Design Competition Aircraft,
2021
Department of Mechanical and Materials Engineering, Florida International University
Aerodynamic Shape Multi-Objective Optimization For Sae Aero Design Competition Aircraft, Ruben Fernandez, Hernando Lugo, George S. Dulikravich
2022 MME Undergraduate Research Symposium
The SAE Regular Class Aero Design Competition requires students to design a radio-controlled aircraft with limits to the aircraft power consumption, take-off distance, and wingspan, while maximizing the amount of payload it can carry. As a result, the aircraft should be designed subject to these simultaneous and contradicting objectives: 1) minimize the aerodynamic drag force, 2) minimize the aerodynamic pitching moment, and 3) maximize the aerodynamic lift force. In this study, we optimized the geometric design variables of a biplane configuration using 3D aerodynamic analysis using the ANSYS Fluent. Coefficients of lift, drag, and pitching moment were determined from the …
Development Of A Pipe Crawler Inspection Tool For Fossil Energy Power Plants,
2021
Florida International University
Development Of A Pipe Crawler Inspection Tool For Fossil Energy Power Plants, Julie Villamil, Caique Lara, Anthony Abrahao, Aparna Aravelli, Guilherme Daldegan, Sharif Sarker, Dwayne Mcdaniel
2022 MME Undergraduate Research Symposium
Fossil fuel power plants are complex systems containing multiple components that create extreme environments for the purpose of extracting usable energy. Failures in the system can lead to increased down time for the plant, reduction of power and significant cost for repairs. In the past, inspections and maintenance of the plant's superheater tubes has been predominantly manual, laborious, and extremely time consuming. This is due to the pipe's small diameter size (between 1.3 and 7.6 cm) and the coiled structure of the tubing. In addition, the tubes are often stacked close to each other, limiting access for external inspection. Detection …
Experimental Simulation Of Tornado-Like Vortices And Their Impact On High-Rise Buildings,
2021
The University of Western Ontario
Experimental Simulation Of Tornado-Like Vortices And Their Impact On High-Rise Buildings, Arash Ashrafi
Electronic Thesis and Dissertation Repository
One of the most crucial research areas in wind engineering is tornadoes due to the widespread damages to infrastructure and the environment in North America and other parts of the world. The proper scaling of tornadoes in experimental facilities, generating tornado-like vortices (TLVs) is, therefore, an essential part of evaluating tornado-indued damages on engineered buildings. The capability of producing TLVs of length scales in the range between 1:300 and 1:150 inside the Wind Engineering, Energy and Environment (WindEEE) Dome at Western University has already been demonstrated using only one mode of the full potential of this simulator. A new mode …
Testbed For Pressure Sensors,
2021
Department of Mechanical and Materials Engineering, Florida International University
Testbed For Pressure Sensors, Ana Claus, Borzooye Jafarizadeh, Azmal Huda Chowdhury, Neziah Pala, Chunlei Wang
2022 MME Undergraduate Research Symposium
Currently, several studies and experiments are being done to create a new generation of ultra-low-power wearable sensors. For instance, our group is currently working towards the development of a high-performance flexible pressure sensor. However, with the creation of new sensors, a need for a standard test method is necessary. Therefore, we opted to create a standardized testbed to evaluate the pressure applied to sensors. A pulse wave is generated when the heart pumps blood causing a change in the volume of the blood vessel. In order to eliminate the need of human subjects when testing pressure sensors, we utilized polymeric …
To The Formation Of A Computational Model Of The Cylindrical Part Of Shell Structures – Main Pipelines,
2021
Tashkent State Transport University
To The Formation Of A Computational Model Of The Cylindrical Part Of Shell Structures – Main Pipelines, A Abdusattorov, N B. Ruzieva
Scientific-technical journal
Models and methods of numerical calculation of elements of shell structures - main pipelines - are considered in the work. The refined equations of motion for cylindrical shell structures are obtained. To solve boundary value problems of thin-walled structures, the Bubnov-Galerkin method, finite differences using the sweep method is used. On the basis of the above algorithm, a program and implementation of solving the problems of a cylindrical shell has been developed.
Significance Of The Vehicle Front Design And Gait Postures On Traumatic Brain Injuries Sustained By Different Pedestrian Populations During Car-To-Pedestrian Collisions (Cpcs) - A Computational Approach,
2021
The University of Western Ontario
Significance Of The Vehicle Front Design And Gait Postures On Traumatic Brain Injuries Sustained By Different Pedestrian Populations During Car-To-Pedestrian Collisions (Cpcs) - A Computational Approach, Thava Kalishwara Kumar Gunasekaran
Electronic Thesis and Dissertation Repository
With the increasing prevalence of traumatic brain injuries (TBIs) in road traffic accidents (RTAs), it was identified that the shape of the vehicle's front end and pedestrian postures prior to impact significantly influence pedestrian head injuries. However, the effect of vehicle front shape parameters and gait postures on TBIs sustained in car-to-pedestrian collisions (CPCs) has yet to be quantified. This study used a computational approach to analyze the effect of vehicle shape parameters and pedestrian gait postures on pedestrian TBI risks across a diverse pedestrian population with varying body sizes. Our findings indicate that vehicle shape parameter such as BLEH …
Collision Tracking And Brain Mapping,
2021
Purdue University
Collision Tracking And Brain Mapping, Carl Russell Iii
The Journal of Purdue Undergraduate Research
No abstract provided.
Multiphase Energetic Experiments: Application Of Multiple Object Tracking,
2021
Purdue University
Multiphase Energetic Experiments: Application Of Multiple Object Tracking, Sarah Davis Finch
The Journal of Purdue Undergraduate Research
The process of using computer vision for multiple-objects tracking is incredibly complex. Thus, simulated data was created to mimic the complexities of more realistic data. These test cases would isolate a few of the inaccuracies of real data and allow the researchers to determine what factor of said data is the most detrimental to the object-tracking process. Due to the large quantity of factors at play, Cotter’s method was used to analyze the significance of each factor. The number of detections and the number of centroids were the main dependent results that were utilized to analyze the data. The overall …
Modeling The Ambient Conditions Of A Manufacturing Environment Using Computational Fluid Dynamics (Cfd),
2021
University of South Florida
Modeling The Ambient Conditions Of A Manufacturing Environment Using Computational Fluid Dynamics (Cfd), Yang Liu
USF Tampa Graduate Theses and Dissertations
As manufacturing equipment evolve to higher speed and require high precision operations, the impact of environmental changes on machine accuracy becomes critical. Due to thermal expansion, the structure of the machine can change when ambient temperature varies. When the airflow in the laboratory changes, this also alters the operator's thermal comfort. Either the change in machine structure or operator comfort can ultimately affect machine accuracy. The manufacturing industry is currently using heating, ventilation, and air-conditioning (HVAC) systems to regulate the temperature of the working environment. However, since conventional HVAC systems determine whether to activate the HVAC system by collecting the …
