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Full-Text Articles in Engineering Science and Materials

Effect Of Cryomilling On Zinc Sulfide Effectiveness As Antibacterial Substance For Burn Wound Healing, Jianqiang Li Jan 2015

Effect Of Cryomilling On Zinc Sulfide Effectiveness As Antibacterial Substance For Burn Wound Healing, Jianqiang Li

Graduate Theses and Dissertations

This study aims to investigate the effect of the manufacturing process cryomilling on the antibacterial effectiveness of a novel antibacterial agent ZnS. ZnS nanoparticles are getting attention for their potential antibacterial properties due to the fact that release of Zn ions has demonstrated promising preliminary effects when applied on skin wounds. Particle size is essential to achieve bacteria inhibition and elimination since it has been shown that antibacterial activity can be increased with reduced particle size, which results in higher surface to volume ratio. In this study, ZnS nanoparticles were synthesized using one-pot colloidal synthesis as well as using biological ...


An Automated Method For The Layup Of Fiberglass Fabric, Siqi Zhu Jan 2015

An Automated Method For The Layup Of Fiberglass Fabric, Siqi Zhu

Graduate Theses and Dissertations

This dissertation presents an automated composite fabric layup solution based on a new method to deform fiberglass fabric referred to as shifting. A layup system was designed and implemented using a large robotic gantry and custom end-effector for shifting. Layup tests proved that the system can deposit fabric onto two-dimensional and three-dimensional tooling surfaces accurately and repeatedly while avoiding out-of-plane deformation. A process planning method was developed to generate tool paths for the layup system based on a geometric model of the tooling surface. The approach is analogous to Computer Numerical Controlled (CNC) machining, where Numerical Control (NC) code from ...


Application Of Analytic Tools For Materials Selection, Pallavi Dubey Jan 2015

Application Of Analytic Tools For Materials Selection, Pallavi Dubey

Graduate Theses and Dissertations

The objective of this thesis is the targeted design of new wear resistant materials through the development of analytic frameworks. The building of databases on wear data, whether through calculation or experiment, is a very time-consuming problem with high levels of data uncertainty. For these reasons of small data size and high data uncertainty, the development of a hybrid data analytic framework for accelerating the selection of target materials is needed. In this thesis, the focus is on binary ceramic compounds with the properties of interest as friction coefficient and hardness and with the objective being to minimize friction while ...