Search results | J. Murrey Atkins Library

Title: Exploring high-energy and mechanically robust anode materials based on doped graphene for lithium-ion batteries: a first-principles study
Author: Xu, Jun, Chang, Cheng, Yin, Sha
Date Created: 2020
Subjects--Topical: Lithium ion batteries, Mechanical engineering
Description: In this study, the adsorption of Li atoms on various types of doped graphene with substituents, including boron, nitrogen, sulfur and silicon atoms, has been theoretically investigated by first-principles calculations, based on the density functio...

Title: Analytical modeling framework for performance degradation of PEM fuel cells during startup-shutdown cycles
Author: Xu, Jun, Yin, Sha, Li, Yunqi, Chen, Xiran
Date Created: 2020
Subjects--Topical: Mechanical engineering, Fuel cells
Description: Startup-shutdown cycling is one of the main factors that contribute to fuel cell deterioration related to high cathode potential. In this study, a coupled model with the carbon corrosion model and agglomerate model of the cathode catalyst layer is...

Title: Micelle-assisted strategy for the direct synthesis of large-sized mesoporous platinum catalysts by vapor infiltration of a reducing agent
Author: Xu, Jun, Li, Yunqi, Liu, Yuwei, Yamauchi, Yusuke
Date Created: 2018
Subjects--Topical: Metals, Mechanical engineering
Description: Stable polymeric micelles have been demonstrated to serve as suitable templates for creating mesoporous metals. Herein, we report the utilization of a core-shell-corona type triblock copolymer of poly(styrene-b-2-vinylpyridine-b-ethylene oxide) an...

Title: Dynamic behaviour of core-shell structured Si nanoparticles during lithiation/delithiation cycling at dynamic loadings
Author: Xu, Jun, Gao, Xiang, Yuan, Chunhao
Date Created: 2018
Subjects--Topical: Materials--Dynamic testing, Mechanical engineering
Description: Dynamic behaviours of the core-shell structured (CSS) Si nanoparticles during electrochemical cycling were modelled. A core-shell-structured model that contained Si nanoparticles wrapped with amorphous carbon (a-C) was established. The system was ...

Title: EXPERIMENTAL INVESTIGATION OF TURBULENT WAKE STRUCTURES AND DYNAMIC COUPLING OF TANDEM LIFTING BODIES IN A HYDRODYNAMIC CHANNEL
Author: Hellman, Samuel
Date Created: 2012
Subjects--Topical: Mechanical engineering
Description: Two experimental studies are carried out on interacting tandem bodies in incompressible, turbulent flow and the design of a hydrodynamic water channel in which the studies are conducted is discussed. The water channel has a 1 m^2 test section, and...

Title: EXPERIMENTAL AND COMPUTATIONAL STRATEGIES FOR ENHANCING MASS TRANSPORT AND CRYOPRESERVATION OF BIOLOGICAL TISSUES
Author: Karthik Kumar, Balasubramanian
Date Created: 2012
Subjects--Topical: Mechanical engineering, Biomedical engineering
Description: A bioreactor is a large-scale engineered in vitro device that maintains a 3D arrangement of functioning cells for use in various bioengineering applications. The current work is focused on heat and mass transfer issues related to the bioreactor's ...

Title: FULL-SCALE TESTING AND NUMERICAL MODELING OF A MULTISTORY MASONRY STRUCTURE SUBJECTED TO INTERNAL BLAST LOADING
Author: Zapata, Brian
Date Created: 2012
Subjects--Topical: Mechanical engineering, Physics, Civil engineering
Description: As military and diplomatic representatives of the United States are deployed throughout the world, they must frequently make use of local, existing facilities; it is inevitable that some of these will be load bearing unreinforced masonry (URM) str...

Title: FUNDAMENTALS OF MATERIAL REMOVAL IN SILICON CARBIDE FOR FREEFORM OPTICS
Author: Shanmugam, Prithiviraj
Date Created: 2019
Subjects--Topical: Mechanical engineering
Description: The mechanical and thermal properties offered by Silicon carbide (SiC) make it an ideal material for reflective freeform optics. However, the hardness, brittleness and fracture toughness of the material pose a challenge to manufacturing. The manuf...

Title: Correction of the post-necking True Stress-Strain data using Instrumented Nanoindentation
Author: Romero Fonseca, Ivan
Date Created: 2014
Subjects--Topical: Mechanical engineering, Materials science
Description: The study of large plastic deformations has been the focus of numerous studies particularly in the metal forming processes and fracture mechanics fields. A good understanding of the plastic flow properties of metallic alloys and the true stresses ...

Title: Design and Development of an Experimental Apparatus for Hardware-In-Loop Testing of Solar-Assisted Heat Pump Systems
Author: van Arnold, George
Date Created: 2020
Subjects--Topical: Mechanical engineering, Engineering
Description: Growing concerns related to the environmental impacts of rising global energy consumption compel the continued development of low-emission technologies for the building sector. In the United States, space conditioning and domestic hot water genera...

Title: Design and Verification of a Levitation Device
Author: Lambert, Brittney
Date Created: 2019
Subjects--Topical: Mechanical engineering
Description: This thesis describes the design and verication of a force measurement instrumentusing levitation through use of a voice coil actuator. The device can suspend an external force of up to 10N, and determine that external force to within ±0.003N. Mec...

Title: Design Analysis of Tesla Turbine
Author: Kausik, Galab
Date Created: 2017
Subjects--Topical: Mechanical engineering
Description: This thesis discusses the "Design Analysis of the Tesla Turbine" or so called "Flat Disc Turbine" using "Compressed Air" as the working fluid. Nikola Tesla invented the turbine in 1906 and received the patent in 1913. Using the word "Turbine", it ...

Title: Distributed Renewable Energy Technologies:Design and Development of Scalable Transmission Systems
Author: Menon, Shruti Mohandas
Date Created: 2018
Subjects--Topical: Mechanical engineering
Description: Renewable forms of energy are being intensively pursued and investigated in systems connected to the grid as well as in standalone applications. The global energy generation is expected to grow 2.7 times by the year 2035. Today, renewable energy r...

Title: Processing and properties of materials with or without adiabatic shear susceptibility
Author: Chen, Xiaoxue
Date Created: 2018
Subjects--Topical: Mechanical engineering, Materials science
Description: In this dissertation, two topic areas related to adiabatic shear banding (ASB) phenomenon were studied. Body centered cubic (BCC) metals and alloys may exhibit ASB under uniaxial high strain rate compression if the grain size is refined into the u...

Title: Real-Time Control and Optimal Plant Design for Renewable Energy Systems Using Bayesian Optimization
Author: Baheri, Ali
Date Created: 2018
Subjects--Topical: Mechanical engineering, Computer science
Description: The overarching objective of this research is to use machine learning tools to address the design and real-time control of active systems, focusing specifically by tethered airborne wind energy and ocean current energy systems. In both application...

Title: PERFORMANCE AND SPECIFICATION OF OPTICAL COMPONENTS WITH MID-SPATIAL FREQUENCY SURFACE ERRORS
Author: Aryan, Hamidreza
Date Created: 2019
Subjects--Topical: Mechanical engineering, Optics, Engineering
Description: The advent of sub-aperture computer-numerically controlled (CNC) manufacturing techniques has enabled new opportunities for high-performance optical components and systems. Freeform and other challenging designs are now possible like never before....

Title: PERFORMANCE EVALUATION OF A TWO-BAR BRIDGE RAIL FOR COMPLIANCE WITH MASH TL-3 CONDITIONS USING FINITE ELEMENT ANALYSIS
Author: Fatoki, Joshua
Date Created: 2020
Subjects--Topical: Mechanical engineering
Description: Roadside barriers are important safety devices installed on highways to mitigate the severity of injuries caused by crashes of errant vehicles. The two-bar metal bridge rail is a commonly used roadside barrier in North Carolina and is recognized f...

Title: PENETRATION RESISTANCE OF 4340 STEEL/POLYUREA LAMINATE
Author: Pajjuri, Vishnu Vardhan Kumar
Date Created: 2017
Subjects--Topical: Mechanical engineering, Military art and science, Chemistry, Polymers
Description: Enhancement of the penetration resistance of materials used in the defense industry is of great interest since such improvements can save human life and can reduce the loss of resources caused by high velocity projectiles penetrating through the w...

Title: Performance Investigation of Rotary Tables in Large-scale Metrology
Author: Wang, Qichang
Date Created: 2019
Subjects--Topical: Mechanical engineering
Description: Rotary tables significantly improve the flexibility and efficiency of multi-axis measuring devices and multi-axis machining centers by providing a quick positioning of workpieces. Large-scale rotary tables are designed and produced for increasing ...

Title: Performance tuning of IC engine with variable exhaust system using a one-D simulation tool
Author: Gajula, Vineeth
Date Created: 2017
Subjects--Topical: Mechanical engineering, Automobiles--Design and construction
Description: The exhaust system has a significant effect on the breathing capability of an IC engine, which when increased, increases the volumetric efficiency. Due to the sudden opening of the exhaust valve, the highly pressurized gases in the combustion cham...