NUST Institutions Library Catalogue Search for 'an:"120899"'

Analysis Of Micro Milling Cutting Parameters & Tool Wear Of Titanium Alloy (Ti-3al-2.5v) Machining /

By Khan, Muhammad Ayyaz . . 90p. , With exigent demand, and requirement of miniature products in medical, aerospace, and electronic industry, it is growing need to introduce new low cost, high quality, and high accuracy process capable of producing miniature products. Despite of many advantages and very suitable process for miniature devices, there are still some challenges in micro- milling. Formation of burr is one of the major problems which is being faced in micro milling. Extensive research has been conducted to minimize its formation. Titanium alloys possesses excellent properties which make them first choice for medical & aerospace applications. Titanium grade-5 (Ti-6Al-4V) alloy abounds in literature for most of the applications but there are some applications, where due to excellent properties of titanium grade 9 (Ti-3Al-2.5V), it becomes an attractive choice for precision production applications i.e., pacemaker in medical and honeycomb in advanced aerospace applications. The current work in this research study aimed to analyze the influence of various process parameters of micro milling operation on the surface quality, burr formation and tool flank wear in micro machining of titanium grade 9. Three levels of each process parameter were taken into consideration. Process parameters were statistically analyzed by employing ANOVA (analysis of variance) for key process parameters. Results of this study show that feed rate is major factor influencing the surface roughness & burr formation with contribution ratio of 62.96 % & 54.05 % respectively, whereas cutting speed and depth of cut were also significant factors for surface roughness with contribution ratio of 20.32 % & 9.27 % while contribution of these two parameters for burr width stood at 21.63 % & 10.91% respectively. Cutting speed is major influencing factor for tool flank wear with contribution ratio of 54.02 % while feed rate contribution stood at 33.18 %. Depth of cut found insignificant factor for tool flank wear. Feed rate was only significant factor in length of burr with contribution ratio of 45.14%. Confirmation tests were conducted at optimum parameters which showed minimum value of burr width, length, surface roughness and tool flank wear. 30cm.

Place Hold on Analysis Of Micro Milling Cutting Parameters & Tool Wear Of Titanium Alloy (Ti-3al-2.5v) Machining /

Modeling and analysis of Polyurethane filled automotive coil spring for enhanced damping application /

By MUIZ , ABDUL . . 71P. ; 30cm..

Place Hold on Modeling and analysis of Polyurethane filled automotive coil spring for enhanced damping application /

Mechanical Characterization of Natural Fiber Reinforced Jute/Glass Hybrid Epoxy Composite with Ceramic Reinforcement /

By Tariq ,Ali . . 84p. ; 30cm..

Place Hold on Mechanical Characterization of Natural Fiber Reinforced Jute/Glass Hybrid Epoxy Composite with Ceramic Reinforcement /

MODIFICATION, INTEGRATION AND TESTING OF MULTI POWDER HOPPER WITH CO-AXIAL NOZZLE FOR LASER CLADDING /

By Ali ,Ahsan. . 61p. ; 30cm..

Place Hold on MODIFICATION, INTEGRATION AND TESTING OF MULTI POWDER HOPPER WITH CO-AXIAL NOZZLE FOR LASER CLADDING /

Statistical analysis of Process Parameters during Micro milling of Inconel-718 using cryogenic fluid as cutting coolant /

By Idrees ,Muhammad . . 57p. ; 30cm..

Place Hold on Statistical analysis of Process Parameters during Micro milling of Inconel-718 using cryogenic fluid as cutting coolant /

Rig Design and Experimental Energy Harvesting from Automotive Suspension System Using Mechanics and Hydraulics /

By Sultan, Raja Areeb. . 44p. , From the day first of invention of fuel engines, its lower efficiency and environmental concerns were always problematic. Only 30-40% of total heat energy of fuels is used in engines for mechanical work and rest of all is lost. Vibrational energy of shocks can be converted to electrical energy by means of some mechanical setup. This setup will consist of a to-and-fro motion to rotary motion convertor. An alternator will be deployed that will be powered by this rotary motion caused by suspension system and it will ultimately power the battery or the accessories directly. Aim of the project was to design a testing rig so that the variable data of vibrational amplitude can be applied to the shock absorber along with the power harvesting mechanism for experimental analysis. To test all that setup a testing rig was be designed that will be equipped with shock absorber, a motion converting mechanism, an alternator and a pneumatic actuator that will be a tool for applying real time obtained data. It was not possible to apply variable data with the cam follower mechanism, so a pneumatic cylinder is used along with power supply. To apply data acquired automatically, Arduino is used along with MOSFET and SD card module. Energy harvested was calculated and the effect on the stiffness of shock absorber after adding power harvesting mechanism is also analyzed. 30cm.

Place Hold on Rig Design and Experimental Energy Harvesting from Automotive Suspension System Using Mechanics and Hydraulics /

INTERMITTENT STEAM-POWERED ENERGY GENERATION USING DOMESTIC WATER GEYSERS /

By Raza ,Kazim . . 37p. ; 30cm..

Place Hold on INTERMITTENT STEAM-POWERED ENERGY GENERATION USING DOMESTIC WATER GEYSERS /

Data Acquisition & Experimental Analysis Of Power Harvesting From Suspension System /

By Hassan, Ahmad Sabur . . 66p. , Energy crisis and environmental problems such as oil shortage and atmospheric pollution have brought challenges for new development of an energy saving, efficient and environment friendly power transmission system in vehicles. This research is focused on how to use the vibrational energy of the suspension system to generate power that would otherwise go as waste. It is demonstrated that the potential energy of driving vibration is sufficient to be utilized as a sustainable energy. The vibrations experienced by the shock absorber of the vehicle when passed through some irregularities on the road are converted into useful energy by using a regenerative linear or rotary mechanism. As shock absorber effect formed, spring is compressed, and linear movement of rack is converted in rotary motion due to pinion moves as the rack is meshed with pinion. And the pinion is mounted on the shaft of the generator which then produce the power. It is then used to calculate the practical power generated from the regenerative shock absorber by taking the real vibrations amplitude data from the road. The vibrations amplitude data is acquired from the road by driving motorcycle on different road conditions with the setup installed in it to calculate and store the vibrations amplitude data. Later, the same data is applied to the testing rig by using pneumatic and Arduino to find out the voltage generated. The power that is practically generated by testing the mechanism on the rig is around 9.5 watts. The harvestable power from the suspension depends on the vehicle speed, road roughness and stiffness of the tire. This regenerated energy is used to charge the battery. 30cm.

Place Hold on Data Acquisition & Experimental Analysis Of Power Harvesting From Suspension System /

Simulation of Structural Integrity of Rubber Brick Wall for Constructional Purposes /

By Masood, M Faizan Iqbal . . 172p. , An earthquake is a natural phenomenon that causes extreme destruction and death. Earthquakes are caused by sudden releases of energy from the earth's interior that cause the earth's crust to shake. A tectonic plate slips past another during this event. A natural disaster such as an earthquake may be rarer than other types, but it can create more devastation and death than any other natural hazard, making it one of the most destructive on the planet. In Newbury, UK, the International Serological Centre (ISC) and the World Data Centre A in Boulder, Colorado, USA, hold comprehensive lists of seismic events. As part of the efforts to improve earthquake predictability, much research has also been conducted on earthquakeprone areas worldwide. To counteract this destruction, humankind has been evolving and dealing with different methods to reduce the number of lives lost. The objective was to simulate on Abaqus a 4x4 wall of bricks made from polyurethane joined by epoxy to test on what magnitude does wall break. The wall was tested and almost sustained 7.1 magnitude. There were cracks in the wall but the bricks did not break instead the bonding agent gave up and the wall fractured. 30cm.

Place Hold on Simulation of Structural Integrity of Rubber Brick Wall for Constructional Purposes /

Energy Harvesting From Suspension System of Vehicle /

By Rashid ,Ammar . . 52p. ; 30cm..

Place Hold on Energy Harvesting From Suspension System of Vehicle /

Design And Evaluation Of Shock Absorber Electricity Generator With Telescopic Coil Spring Sleeves /

By Awais, Muhammad . . 55p. , Development and production of Electric Vehicles is now becoming a necessity for automakers across globe due to energy crisis and global warming. This study presents a design concept for vibrational energy harvesting from coil springs of a vehicle using electromagnetic induction. A novel helical magnet spring design is presented that is cost-effective yet sophisticated to fit in any on-going production setup with minimal cost addition per vehicle yet adds to the electrical output. For this purpose an application for Lenz Law is devised using a variance approach in modeling design. 3 design models are simulated in SolidWorks 2017 to analyze the relative motion required for application of N42 series magnets according Lenz Law. A set of USN 12600 winding copper coil sleeves are placed as an outer shell to induce current w.r.t. relative motion of magnets. Design is developed with target of low weight i.e. 10 kg. Various models are developed to meet the targets and evaluated, in EMworks simulation tool for SolidWorks, before any modeling is done. After re-design & evaluation iterations, a final model is selected on ease of assembling and output. Each model is simulated and total current output is measured for a single coil spring. Further, design is optimized for minimal weight of 3.68 kg with an output of 10.843 kW for a total of 1500 oscillations. The practical application for this model is mainly heavy transport vehicles due to their continuous vibrational behavior even on smooth roads in addition to rough traction. Further research avenues for proposed design include simulation on stress analysis, thermal analysis and fatigue cycles. 30cm.

Place Hold on Design And Evaluation Of Shock Absorber Electricity Generator With Telescopic Coil Spring Sleeves /

Multi Objective optimization in micromilling of titanium alloy (Ti6Al4V) under Dry, Wet and MQL using gray relational analysis /

By Khan ,Sohail . . 64p. ; 30cm..

Place Hold on Multi Objective optimization in micromilling of titanium alloy (Ti6Al4V) under Dry, Wet and MQL using gray relational analysis /

Experimental Investigation of Energy Harvesting at Outlet of IC Engine using Fire Tube Boiler /

. 76p. ; 30cm..

Place Hold on Experimental Investigation of Energy Harvesting at Outlet of IC Engine using Fire Tube Boiler /

Study the effect of shallow cryogenic treatment on mechanical and microstructural properties of 30CrMnSiA steel heat treated in vacuum furnace and Box Type conventional air furnace /

By Aslam, Muhammad Danyal . . 50p. , Heat treatment plays a major role in improving the material properties. With the addition of cryogenic treatment these properties can be further improved. In this paper heat treatment is carried out on low carbon low alloy structural steel in two different types of furnaces conventional box type air furnace and vacuum furnace along with shallow cryogenic treatment with the purpose to investigate the outcome of shallow cryogenic treatment on the material properties and to find out which type of furnace is more suitable with shallow cryogenic treatment. For this purpose, structural steel 30CrMnSiA was selected, and heat treatment was carried out in conventional box type air furnace (900°C × 40mins) and vacuum furnaces (900°C × 70mins), shallow cryogenic treatment (-75°C × 125mins) was carried out after the quenching and before tempering. For the physical properties of the material, hardness (HRC) was investigated using Brinell hardness tester HBD-62-5AP. Tensile samples were prepared as per ASTM E8/E8M and investigated using 100kN WAW-100B Electro-Hydraulic Servo Computer Control Universal Testing Machine. Impact toughness was measured by using electronic pendulum impact testing machine CBD-300 and specimens were prepared using ASTM standard E23-12c. Microstructural analysis for grain structure was carried out using Olympus DSX1000 optical microscope. 30cm.

Place Hold on Study the effect of shallow cryogenic treatment on mechanical and microstructural properties of 30CrMnSiA steel heat treated in vacuum furnace and Box Type conventional air furnace /

Design and Development of Energy Harvesting using Domestic Geyser /

By Haider, Syed Muhammad Taqi . . 79p. , Energy harvesting is being done through many techniques. Energy is extracted from various unconventional resources including light, heat, etc. Environmental power generation is another alternative word. This research is basically aimed at such a technique, which is rather new in energy harvesting. Basically, the system has four major parts. A domestic water geyser, steam turbine, generator and an energy storage unit. In this technique, domestic water geyser is used for steam production. It is installed in a steam turbine. The shaft is coupled with the generator which produces energy. The energy is stored in the battery afterwards. The turbine is designed in such a way that it increases the overall efficiency of the system. Water is converted into high-pressured steam. The turbine rotor starts to move due to the high pressure. Since its connected to the generator, it produces electric charge. The system is designed in such a way that the turbine has an outlet orifice which is connected back to the water entry pipe assembled against the geyser. The steam leaves through orifice and enters back through the water-inlet pipe. In this way, less energy is wasted which means that the system efficiency increases. The whole design was first simulated using SolidWorks. These simulations helped in designing a proper steam turbine. The design includes dimensions, energy calculations and material selection. Proper operating points have been found using literature study and Hit-and-trial methodology. In the end, results have been shown and discussed as it is a Simulation-based thesis. Different operating points were established. The goal was to design an industrialfriendly system and to provide a supplemental source of electric power to the common man of the country. 30cm.

Place Hold on Design and Development of Energy Harvesting using Domestic Geyser /

Life Cycle Assessment of Marble Manufacturing /

By Ullah ,Wahid . . 89p. ; 30cm..

Place Hold on Life Cycle Assessment of Marble Manufacturing /