Numerical Analysis Of Time-Varying Wear With Elastic Deformation In Line Contact, 2020 School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
Numerical Analysis Of Time-Varying Wear With Elastic Deformation In Line Contact, Wanglong Zhan, Ping Huang
Friction
Wear is an important factor for failures of mechanical components. Current research on wear is mainly focused on experiments while the numerical simulation of wear is hardly used owing to the complexities of the wear process. Explaining the effect of friction on the wear process is important, as it will lead to a deeper understanding of the evolution of wear. This study proposed a numerical method to expound the wear process in the contact between an elastic cylinder and a half-space simulating the ring-block tester. There are two difficulties during the calculation; one is that the contact shapes vary with …
Theoretical Studies Of Spinning Line Parameters Of Ring Spinning Machines, 2020 Namangan muhandislik-texnologiya instituti
Theoretical Studies Of Spinning Line Parameters Of Ring Spinning Machines, Nurilla Dadaxanov
Acta of Turin Polytechnic University in Tashkent
The article studies the angle of discharge of exhaust devices and obtaining of analytical dependencies for calculating the angle of flow around the sliver of the exhaust cylinder on the spinning line of ring spinning machines.
The Concept Of The Mathematical Description Of The Multi-Coordinate Mechatronic Module Of The Robot, 2020 Doctoral student of Tashkent State Technical University named after Islam Karimov
The Concept Of The Mathematical Description Of The Multi-Coordinate Mechatronic Module Of The Robot, Temurbek Omonboyevich Rakhimov
Acta of Turin Polytechnic University in Tashkent
The article deals with the concept of mathematical de- scription of multi-coordinate mahatronic modules of robots. The main results of the work are a generalized structure of a multi- coordinate mechatronic module of motion, a kinematic diagram of an electromagnetic multi-coordinate mechatronic module with three independent coordinate linear and angular movements is proposed, consisting of four electromagnets, controlled couplings designed to transmit the reciprocating motion of the moving parts of electro- magnets to the output rods and a cable, which are associated with the links of work and bringing them into linear and angular mo- tion. A simulation model of …
Me-Em 2019-20 Annual Report, 2020 Michigan Technological University
Me-Em 2019-20 Annual Report, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical Engineering-Engineering Mechanics Annual Reports
Table of Contents
- Element 1
- Element 2
- Element 3
- Element 4
- Enrollment & Degrees
- Graduates
- Department
- Alumni
- Donors
Me-Em Enewsbrief, September 2020, 2020 Michigan Technological University
Me-Em Enewsbrief, September 2020, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical Engineering-Engineering Mechanics eNewsBrief
No abstract provided.
Design And Development Of Strong And Ductile Single Bcc Refractory High-Entropy Alloys For High-Temperature Applications, 2020 University of Tennessee
Design And Development Of Strong And Ductile Single Bcc Refractory High-Entropy Alloys For High-Temperature Applications, Chanho Lee
Doctoral Dissertations
The objectives of this proposed study are to (1) design and develop single BCC phase refractory high-entropy alloys (HEAs) for the high-temperature applications, (2) investigate the deformation mechanisms of refractory HEAs, (3) improve an integrated approach, coupling focused experiments and theoretical modeling, to design, discover, and develop HEAs, and (4) understand the alloy design-microstructure-property-performance links underlying the mechanical behavior of refractory HEA systems for gas-turbine applications
A traditional alloy system generally includes one or two principal elements that form the matrix with other additional elements, e.g., iron or aluminum alloys, to strengthen some specific properties, such as strength and corrosion …
Development Of High-Density Propulsion System Technologies For Interplanetary Small Satellites And Cubesats, 2020 University of Arkansas, Fayetteville
Development Of High-Density Propulsion System Technologies For Interplanetary Small Satellites And Cubesats, Morgan Andrew Roddy
Graduate Theses and Dissertations
The goal of this research was to support the development of a novel propulsion system for small satellites (<180 kg) and CubeSats. This was pursued by conducting a collection of studies that were designed to provide engineering data that would be critical in designing a functional prototype. The novel propulsion system was conceived by the author to provide best-in-class performance for the small satellite and CubeSat families of spacecraft. This context presents specific design requirements that the presented technology attempts to satisfy. The most critical among these is high density; the propellant was designed to be stored with high density and the thruster was designed to be as compact as possible. The propulsion system is composed of two primary elements, a propellant generator and a thruster. The propellant generator works by sublimating a solid crystal into vapor and then using this vapor to etch a dense metal. The resulting gaseous byproducts of this reaction are the propellant. This dissertation used xenon difluoride (XeF2) vapor to etch tungsten (W) which react to form xenon gas (Xe) and tungsten hexafluoride (WF6). This approach gave a theoretical propellant storage density 5.40 g/cm3; and 5.17 g/cm3 was demonstrated. The sublimation dynamics of the XeF2 were studied as a function of surface area and temperature and it was found to be suitable for the intended application due to its high effluence rate; that is, it sublimates fast enough to be useful. The sublimation rates are on the order of 10’s of µg/s. The etch rate of XeF2 on W was also studied and found to be suitably fast to provide useful amounts of reactants for use as a propellant, again on the order of 1’s of µg/s. The thruster is an electrostatic radio frequency (RF) ion thruster design and is manufactured with Low Temperature Co-Fired Ceramic (LTCC) materials system and manufacturing technology. Manufacturing samples of the thruster were built at the University of Arkansas in July 2015 and tested at NASA’s Marshall Space Flight Center in May 2018. Testing validated the viability of the LTCC thruster and provided valuable information on how to improve the thruster’s design.
Open-Source Digitally Replicable Lab-Grade Scales, 2020 Michigan Technological University
Open-Source Digitally Replicable Lab-Grade Scales, Benjamin R. Hubbard, Joshua M. Pearce
Michigan Tech Publications
This study provides designs for a low-cost, easily replicable open-source lab-grade digital scale that can be used as a precision balance. The design is such that it can be manufactured for use in most labs throughout the world with open-source RepRap-class material extrusion-based 3-D printers for the mechanical components and readily available open-source electronics including the Arduino Nano. Several versions of the design were fabricated and tested for precision and accuracy for a range of load cells. The results showed the open-source scale was found to be repeatable within 0.05 g with multiple load cells, with even better precision (0.005 …
Mechani-Kits Senior Design Project, 2020 California Polytechnic State University, San Luis Obispo
Mechani-Kits Senior Design Project, Jake Utley, Sophie Carson, Vincent Seguin
Mechanical Engineering
Studies suggest that when designed and executed well, hands-on activities can enhance student understanding of key mechanics concepts. Current products are expensive and typically not designed to meet a variety of learning objectives. Through the Mechanics of Inclusion and Inclusivity in Mechanics grant, the Cal Poly Physics and Engineering Departments are seeking to incorporate new hands-on activities into their courses. Our team has designed three inexpensive ”MechaniKits” to be used in physics, statics and dynamics courses [1]. This Final Design Review outlines our findings, objectives, and final designs for this project. It also explains our manufacturing and design verification plans. …
Me-Em Enewsbrief, June 2020, 2020 Michigan Technological University
Me-Em Enewsbrief, June 2020, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical Engineering-Engineering Mechanics eNewsBrief
No abstract provided.
Fly Ash Based Geopolymer For High Temperature And High Compressive Strength Applications In Aggressive Environment, 2020 CUNY New York City College of Technology
Fly Ash Based Geopolymer For High Temperature And High Compressive Strength Applications In Aggressive Environment, Aaryan Manoj Nair, Akm S. Rahman
Publications and Research
Geopolymers are the results of geosynthetic reactions between aluminosilicates and strong bases. This results in chemical bonds between aluminum (Al), Silicon (Si)and oxygen (O) composing polymer rings in tetrahedral coordination. These bonds give them widespread useful applications such as high heat bearing ceramics, and base construction material whilst being far more environmentally conscious. The purpose of the experiment is to examine the effect of Silicon Carbide whisker and inorganic glass particles on thermal and mechanical properties of Geopolymers. This study will help understand the effect of various compositions and concentrations of SiO2 in mechanical strength. In this experiment, the …
Tympanal Asymmetry In A Parasitoid Fly: Small Asymmetries Produce Big Gains, 2020 Virginia Polytechnic Institute and State University
Tympanal Asymmetry In A Parasitoid Fly: Small Asymmetries Produce Big Gains, Max Mikel-Stites, Anne E. Staples
Biology and Medicine Through Mathematics Conference
No abstract provided.
Development Of Multi-Axial Fatigue Retrofits For Lock Gate Components, 2020 University of Arkansas, Fayetteville
Development Of Multi-Axial Fatigue Retrofits For Lock Gate Components, Logan Verkamp
Graduate Theses and Dissertations
Lock gates are essential infrastructure components to the United State (US) supply chain. They create large cost savings and environmental benefits when compared with traditional methods of transport (freight and rail). Because of the large quantity of goods and dependence on these shipping chains, the US economy can be drastically affected by an unexpected gate closure. Unfortunately, many lock gates within the US have reached or exceeded their designed life. Due to the intensity of cyclic loads and the environment, fatigue cracks have become a prominent issue. Developed cracks near the pintle region (a joint which the gate rotates and …
Impact Resistance Of Fiber-Reinforced Composites Using Computational Simulations, 2020 The University of Maine
Impact Resistance Of Fiber-Reinforced Composites Using Computational Simulations, Maitham Alabbad
Electronic Theses and Dissertations
Composite materials are widely used in aerospace, automotive and wind power industries due to their high strength-to-weight and stiffness-to-weight ratios and their improved mechanical properties compared to metals. The damage resistance of composite materials due to low velocity impact depends on fiber breakage, matrix cracking and delamination between the interfaces. In this research, a numerical investigation of low velocity impact response of a multidirectional symmetric carbon-epoxy composite laminate is carried out and presented. Two different finite element models are developed for composite laminates made of non-crimp fabric to investigate their behavior under different levels of impact energy. In the first …
A Novel Self-Healing System: Towards A Sustainable Porous Asphalt, 2020 Delft University of Technology
A Novel Self-Healing System: Towards A Sustainable Porous Asphalt, Shi Xu, Xueyan Liu, Amir Tabakovic, Erik Schlangen
Articles
Self-healing asphalt, aimed to produce a sustainable asphalt pavement using green technology, has been studied in the past two decades. Technologies including encapsulated rejuvenator and induction heating have been proposed, demonstrated in the laboratory, and gradually evaluated in field application. This paper looks into the synergy effect of the above two technologies, where induction heating serves as the asphalt damage repair mechanism, requiring just 2 min heating time and encapsulated rejuvenator will replenish (rejuvenate) aged asphalt binder and reinstate bitumen’s healing ability. Moreover, the increased temperature from induction heating could in turn accelerate the diffusion process of rejuvenator into aged …
Me-Em Enewsbrief, March 2020, 2020 Michigan Technological University
Me-Em Enewsbrief, March 2020, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University
Department of Mechanical Engineering-Engineering Mechanics eNewsBrief
No abstract provided.
Computational Modeling Of Laminated Veneer Bamboo (Lvb) Dowel Joints, 2020 University of Massachusetts Amherst
Computational Modeling Of Laminated Veneer Bamboo (Lvb) Dowel Joints, Niloufar Khoshbakht
Doctoral Dissertations
Laminated veneer bamboo (LVB) is a sustainable building material that has been gaining interest in the construction industry of late. As a relatively new product, little is known about its connection performance, specifically, its failure behavior in dowel type joints and possible similarities it may have to engineered wood products in terms of failure mechanisms. Research is needed to aid in the understanding of LVB dowel connection failure behavior and to quantify the failure mechanism and key factors associated with LVB dowel connection strength. Modeling, as conducted in this research, is a valuable tool to help devise safe standards and …
R/C Mini Baja Car: Drive Train And Steering, 2020 Central Washington University
R/C Mini Baja Car: Drive Train And Steering, Carlton R. Mcdonald
All Undergraduate Projects
The purpose of the Baja R/C Car is to compete in the ASME eFX competition in a series of events to prove the functionality of the vehicle. This series of events includes the Slalom, Drag, and Baja race, The Slalom is a test in the steering capability of the vehicle, the Drag is a test in the acceleration of the vehicle in a straight line, and the Baja puts all factors together in a race to test every component of the vehicle. This project is about building an R/C car that not only functions, but also has maximum performance capabilities …
Mechanical Footstep Power Generator, 2020 Central Washington University
Mechanical Footstep Power Generator, Mohammed Saleh Aljohani, Faisal Alonazi
All Undergraduate Projects
Mechanical Footstep Power generator
By Author: Mohammed Aljohani
Abstract
Modern technology is focusing on newer and better sources of energy. Among the important areas are power generation methods since electricity has become part of our lives. Various researchers have conducted surveys to find out the feasibility of converting renewable kinetic energy into electricity. Some of the works done in the past emphasized the selection of suitable materials and power generation systems designs that appear complicated and expensive. To ensure there is cost efficiency and energy efficiency better power generation systems need to be embraced.
The footstep power generator is a …
Dual-Axis Solar Tracker, 2020 Central Washington University
Dual-Axis Solar Tracker, Bryan Kennedy
All Undergraduate Projects
Renewable energies, and fuels that are not fossil fuel-based, are one of the prolific topics of debate in modern society. With climate change now becoming a primary focus for scientists and innovators of today, one of the areas for the largest amount of potential and growth is that of the capturing and utilization of Solar Energy. This method involves using a mechanical system to track the progression of the sun as it traverses the sky throughout the day. A dual-axis solar tracker such as the one designed and built for this project, can follow the sun both azimuthally and in …