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Full-Text Articles in Engineering
Texture And Young’S Modulus Of Nickel/Gamma-Alumina Composites, Abdulaziz Alamr
Texture And Young’S Modulus Of Nickel/Gamma-Alumina Composites, Abdulaziz Alamr
Masters Theses
To improve Young's modulus of 2024-T3 rolled aluminum specimens, it was electroplated with nickel reinforced with nano-particles of γAl2O3. Taguchi method was used to investigate the effect of coating variables, which were current density, coating time, and mixing rate, on the coating thickness. The coatings were tested for crystallographic texture, using pole figures of (200) and (111) for nickel and (400) for γAl2O3. Surface topography was measured using WYKO Vertical Interference Microscope. The crystallographic texture of nickel in the coating depended on the coating conditions. A universal testing machine was- used to …
Residual Stress And Wear Resistance Of Composite Coatings Of Nickel/Gamma-Alumina, Khaled Abdulrahman Al-Ogab
Residual Stress And Wear Resistance Of Composite Coatings Of Nickel/Gamma-Alumina, Khaled Abdulrahman Al-Ogab
Masters Theses
Nickel reinforced with nanoparticles of γ−Al2O3 have been successfully codeposited on 2024-T3 cold rolled aluminum alloy by electrodeposition with direct current. The effects of current density, particle concentration in the nickel sulfamate bath, air agitation, and coating time on Ni/γ−Al2O3 composite have been investigated. The residual stresses and wear resistance of the Ni/γ−Al2O3 composite have been measured using X-ray diffractometer and pin-on-disk techniques respectively. The residual stress and wear resistance behavior of the composite were compared with those of nickel-only deposits. An annealed ground nickel, which was mechanically removed from the …
Cfmms – Computerized Facilities Maintenance Management System, Prawit Rotsawatsuk
Cfmms – Computerized Facilities Maintenance Management System, Prawit Rotsawatsuk
Masters Theses
Computerized facilities maintenance management systems, previously available only to very large facilities, are now accessible to small and medium-sized maintenance organizations. Advertisements for such products promise reductions in maintenance costs. Where a manual system of maintenance management is currently employed, moderate reductions in maintenance costs and facility downtime are fully possible. Where no formal maintenance management procedures are present, the structure and case of a computerized maintenance system can result in dramatic cost reductions and improvements in facility availability. There are, however, practical limits to the applicability of computerized maintenance systems. The objective of any maintenance program is to minimize …
Layer Properties Of Oriented Strandboard, Caryn Steidl
Layer Properties Of Oriented Strandboard, Caryn Steidl
Masters Theses
It is well known that the density varies through the thickness of oriented strandboard, with the face being much denser than the core. Hence, the modulus of elasticity and the strength should vary through the thickness. To determine the variation in these properties through the thickness of the panel, a commercial oriented strandboard panel was sliced into fifteen layers to obtain specimens for tension and compression testing. Using multiple saw blades and spacers mounted on an arbor in a milling machine, thin specimens were obtained both perpendicular and parallel to panel length. The specimens were tested in tension using straight-sided …
Internal Forces In A Reinforced Concrete Box Culvert, Scott Mitchell Wood
Internal Forces In A Reinforced Concrete Box Culvert, Scott Mitchell Wood
Masters Theses
In 1996, a reinforced concrete box culvert with approximately 19 meters of embankment fill was instrumented with strain gages and pressure cells to determine the internal forces applied to the culvert. Strain and pressure readings were taken for a period of 3 years during and after the construction of the embankment. From a knowledge of the culvert's dimensions and material properties, the strain readings were converted to forces and bending moments. These forces were then compared to the allowable criteria from the American Association of State Highway and Transportation Officials (AASHTO) Standard Specifications for Highway Bridges. A computer model of …
Learning Reinforced Concreyte Design Principles Using A Java-Vrml Based Design Studio, Amarneethi Vamadevan
Learning Reinforced Concreyte Design Principles Using A Java-Vrml Based Design Studio, Amarneethi Vamadevan
Masters Theses
Dynamics involving reinforced concrete design are the first real engineering course encountered by the undergraduate construction engineering students. Quite often its associated rigorous theories makes it an uninteresting academic hurdle for many below mediocre students. However when the theory is exemplified with multimedia, interaction and visualization techniques, the conceptual understanding is enhanced. The teaching methodology presented in this thesis is based on presenting students with an individualized, interactive and guided learning environment. The main elements of this approach are: a means of assimilating the student's interactive learning knowledge and behavior (user model), representation of the instructor's guidance and assessment knowledge …