Browsing OSU - Electronic Theses and Dissertations by Author "Vaidyanathan, Ranji"
Now showing items 21-40 of 40
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Fastener pull-out resistance of recycled polymer composites
Switzer, Clinton (2023-05)The problem of waste plastics has created a need to find new and innovative ways to keep discarded products out of landfills and turn waste materials into new products of value. By combining carpets made from poly(ethylene ... -
Finite element analysis for the design of novel ceramic propellers
Harmon, Katelynn (2022-12)Ceramics are stiff, lightweight and less prone to deflection. However, ceramics have not historically been used in propeller applications. Little is known about how ceramics will react to the various loading situations of ... -
Fracture behavior and time dependent properties of poss-epoxy nanocomposites
Mishra, Kunal (2015-07)This study investigates the fundamental mechanism that governs the influence of glycidyl POSS on the time-dependent behavior of epoxy-POSS composite as a function of added weight percent. Different formulation of POSS-epoxy ... -
Impact of Nanoclay on Fire Retardancy and Environental Durability of Post Consumer Carpet Composites
Das, Sarat (Oklahoma State University, 2012-12-01)A simple vacuum assisted resin transfer molding (VARTM) process was previously used to scale-up the fabrication of large-size composite specimens from recycled post-consumer waste carpet. These composites exhibited superior ... -
Impact properties of AISI 316L stainless steel repaired by Directed Energy Deposition (DED) additive manufacturing process
Mandal, Soumya (2019-12)Directed Energy Deposition (DED) is considered as one of the potential processes for metallic structural repairs. In this work, the impact properties of the repaired stainless steel 316L were investigated. The repair was ... -
Injection molded poly(ethylene terephthalate)-graphene nanocomposites
Bandla, Sudheer (2015-05)Polymer nanocomposites are known for their superior properties (mechanical, thermal, etc.) compared to conventional composites. Nanoscale reinforcements are used to make such composites as they have fewer defects and higher ... -
Laser Surface Melting of Carbon Coated Aa7075 Aluminum Alloy: Structural Transformations and Tribological Behavior
Biswas, Sourabh (Oklahoma State University, 2014-07-01)Carbon is one of the most common solid lubricants and has often been used to achieve superior tribological properties. In this investigation, a CO2 laser in continuous wave mode was used to develop diamond-like carbon ... -
Mechanical and radiation shielding properties of boron nitride reinforced high-density polyethylene
Herrman, Korey (2020-07)In this study, the mechanical and radiation shielding properties of boron nitride (BN) reinforced high-density polyethylene (HDPE) were investigated. Pure polyethylene is considered the best material to use when shielding ... -
Mechanisms governing onset of sliding friction
Subramanian, Vijay (2014-12)Experimental observations on slip onset during quasistatic shearing of bimaterial interface are presented in this study. Although friction has been a subject of multi-disciplinary research for many decades, events surrounding ... -
Modeling the ionizing radiation environment in Earth's atmosphere
Inman, Paul Edward (2021-05)The constant bombardment of the Earth by cosmic radiation leads to an atmospheric radiation environment comprised of many species of energetic secondary particle. Aside from carrying out full Monte Carlo simulations from ... -
Modern process planning for additive manufacturing assisted a 356 aluminum casting
Garcia, Mikael Andrew (2023-05)Foundry engineering integrates mechanical design, thermal-fluid dynamics, and material science to cast components of a unique design. This project was intended to apply these concepts to optimize the casting process of an ... -
Monitoring of Glass Transition at a Polymer Surface by Localized Surface Plasmon Resonance
Putla, Ratan Kishore (Oklahoma State University, 2010-12-01)The present work investigates glass transition on a polymer surface by embedding gold nanoparticles into the polymer and exploiting the localized surface plasmon resonance (LSPR) of the nanoparticle as the probe. The ... -
Nanoscale carbon fiber-matrix interphase characterization with atomic force microscopy indentation
Seyed Faraji, Leila (2014-05)At the region between fiber and matrix in a composite there is a region called interphase region, which basically has different properties than bulk matrix and fiber. This region is responsible for the loads transfer from ... -
Prediction of Permeability in Compressed Polyurethane Foams in Vacuum Assisted Infiltration Process
Ramanujakannan, Balaji (Oklahoma State University, 2011-05-01)Foams used for radio-frequency(RF) and acoustic shielding were treated with carbon black and cut into pyramidal blocks for better absorption characteristics. The general manufacturing process involves immersion of polyurethane ... -
Scaling Up of Manufacturing Processes of Recycled Carpet Based Composites
Lakshminarayanan, Krishnan (Oklahoma State University, 2011-07-01)In this work, feasibility of recycling post-consumer carpets using a modified vacuum assisted resisted molding process into large-scale components was successfully demonstrated. The scale up also included the incorporation ... -
Study of Polymer-Graphene Conducting Thin Films and Their Properties
Dhakal, Dilli Ram (2018-05-01)Polyaniline (PANI) is a polymer which can be doped by charge-transfer doping and protonation to make it conductive. Not only because of electrical properties but also because of good stability of PANI, it is potentially ... -
Study on electrical degradation, processing and interfacial strength of carbon fiber epoxy composites with polymers and fillers
Jyothishmathi, Deviprakash (2022-12)The electric current induced damages in carbon fiber composites necessitates an improvement in their electric and thermal properties. The study investigates the effect of graphene as a filler material in carbon fiber epoxy ... -
Synthesis and characterization of nanosized hybrid polymer modifier (hpm) for improved mechanical and thermal behaviour of composites
Dhakal, Dilli Ram (2022-05)Lightweight carbon fiber-reinforced polymer composites are replacing metallic components in the aerospace and automotive industries due to their improved strength-to-weight ratios and fatigue resistance. Despite their ... -
Thermal Conductivity of Diamond Thin-films on Silicon Wafers
Harrup, Marshall Addison (2015-12-01)Synthetic diamond films may play an important role in thermal management of processors. Diamond may be up to four times as thermally conductive as copper, but the conductivity of individual films may vary based on synthesis ... -
Virgin Carpetpolymer Structural Laminates
Rajagopalan, Vasudevan (Oklahoma State University, 2011-05-01)Post-consumer carpet waste recycling is in its infant stage in the United States. Currently, a number of initiatives have been taken to recycle carpet waste with an effort to divert away from landfill and incineration. ...