Mechanization and Import Substitution in Zimbabwean Farmers' Equipment: A Case Study of the Revitalization of an Abandoned Tractor Trailer
Drill String Vibrational Analysis and Parametric Optimization for a Portable Water Well Rig Development
An Efficient Deep Neural Network with Amplifying Sine Unit for Nonlinear Oscillatory Systems
The Occupational Directness of Nanorobots in Medical Surgeries
Recent Trends in Solar Thermal Cooling Technologies
Design of Oil-Ammonia Separator for Refrigeration Systems
A Review on Mechanical and Tribological Characteristics of Hybrid Composites
Design and Experimental Investigation of a Natural Draft Improved Biomass Cookstove
Progressive Development of Various Production and Refining Process of Biodiesel
Optimization of Wire-ED Turning Process Parameters by Taguchi-Grey Relational Analysis
Evaluation Of Mechanical Behavior Of Al-Alloy/SiC Metal Matrix Composites With Respect To Their Constituents Using Taguchi Techniques
Multistage Extractive Desulfurization of Liquid Fuel by Ionic Liquids
Isomorphism Identification of Compound Kinematic Chain and Their Mechanism
Development of Electroplating Setup for Plating Abs Plastics
A Comprehensive Review of Biodiesel Application in IDI Engines with Property Improving Additives
Green or renewable energies are energies that can be produced without many negative impacts to the environment and the earth can naturally recover these energy resources when using these sustainable energies. Currently many researches are focusing on design and development of sustainable energy technologies due to the shortage of global traditional energy resources. The wind power turbine systems are used to convert nature wind power to the electricity. This green and clean energy can be used in many energy applications. There are two types of wind power turbine systems including vertical axis and horizontal axis wind turbines. In this research, a new type of vertical axis wind turbine system with improved power converting efficiency is designed and developed through fundamental study, computer-aided modeling, aerodynamic analysis, computational simulation, and prototype testing.
In this paper, a universal quality inspection and quality control machine is presented. This machine is a fusion of different technologies such as vision system, programmable logic controller (PLC), Human machine interface (HMI) and Intelligent ROBO Actuators with other types of sensors. The electrical and mechanical design of the machine and plc program is illustrated in detail. Generally, inspection of raw materials or products at any stage in production or manufacturing or assembly industries may be done manually using measuring instruments, or by machines based on laser sensor technology, using probes, weighing scales, etc. Manual process is too slow and meant to test only few batches out of the entire lot which is less effective. Dedicated machines are usually confined to a single type of raw material considering specific property of the component. This option can be expensive when several different raw materials and product at any stage are to be tested at in-feed line. The proposed universal quality inspection machine is designed and implemented in the PLC lab at University of Bridgeport.
The modulus of elasticity is one of the most important mechanical properties of a material. It needs to be determined accurately in order to facilitate mechanical design, ensure reliability and promote compliance with legislative restrictions. The modulus-temperature relationship is traditionally determined experimentally, and the procedure is time consuming, expensive, and often impossible. The main goal of this work is to obtain a comprehensive analytical relationship between modulus of elasticity and temperature, based on the kinetic nature of the strength of solids and a nonlinear equation of state for materials. The analytical modulus-temperature relationship is compared with existing experimental data. Results demonstrate the potential of the nonlinear approach to predict the static and dynamic elastic modulus of different engineering materials (metals, plastics, and concrete) as a function of temperature.
Numerical simulations of ferrofluids are carried out in two-dimensional and three-dimensional space in order to analyze the magnetic effects on flow behavior for magnetic drug targeting (MDT) applications. MDT is a novel technique that allows the concentration of drugs to be guided to a defined target region (TR) with the help of a magnetic field, made possible by the magnetic property of the fluid itself. Ferrofluids, are two-phase solutions composed of magnetic nanoparticles suspended in a carrier fluid Ferrofluids are modeled in a pipe geometry with a sphere-shaped target site and magnetic effects are modeled as fields resulting from current carrying wires. Parameters that are studied include different strengths and locations of magnetic field. Pressure distributions and velocity contours particularly in the TR show the added flow recirculation and increase in the fluid’s retention time at the TR, due to the magnetic field.Furthermore, the studies presented here provide a fundamental understanding of the behavior of a magnetic fluid, modeled here as a single-phase fluid thereby affirming the feasibility of such fluids in MDT applications with regard to enhanced drug transfer.
Hardening is one of the heat treatment process, which is done for improving some desirable mechanical properties of carbon steel. Medium carbon steel is used as various structural parts in industries. Among those, chain conveyor pin, etc are required hardening to increase the surface hardness and to resist wear. But due to hardening some other mechanical properties are being changed. In this present experimental work, changes of mechanical properties like UTS, impact strength, and fatigue strength of medium carbon steel due to hardening have been studied. Hardness of specimen has been changed by water quenching and oil quenching. Subsequently micro structural study under SEM has been carried out for fatigue failed surface. Significant changes have been observed in both mechanical strength level and micro structural level.
Characterization of AA 2219 weldments in T6 condition has been presented in this paper. Automatic TIG welding process has been employed to weld 6.5mm thick 2219-T87 plates. 2319 filler wire has been considered for welding. Tensile and microhardness values have been studied and results confirmed by metallography. 2219 wrought aluminium alloy derives its high strength from the precipitation of CuAl2. T6 has been given as the post weld heat treatment condition to regain the strength lost during the welding.
The performance of vapor compression refrigeration system depends on the individual performance of its type, components and quantity of the refrigerant. In this regard the design of capillary tube used as an expansion device requires proper attention for better design, control and operation of the system. Many researchers have done works on straight capillary tube under homogeneous flow conditions for limited refrigerants without considering coiled effects, separated and non adiabatic conditions. The objective of this work is to estimate the performance of a coiled capillary tube under adiabatic and non-adiabatic, separated flow including metastable conditions. The effect of various design parameters such as tube diameter, coil diameter, subcooling on the flow rate of capillary tube was studied. The experimental results are validated with previous results from developed models & experimental observations and a good agreement was observed. 6 to 15% decrease in mass flow rate of R 410A is noticed in coiled capillary tubes over a range of coil diameters 40-120mm as compared to that of straight capillary tubes under similar operating conditions. The effects of the length of capillary tube on the mass flow rates were studied and it is noticed that there is only a marginal drop in mass flow rates about 1.5% and even smaller beyond 1000 mm length.
Over the recent years there has been an ever-increasing trend to replace metals with plastics in the manufacture of computers, business and industrial machines, automotive and telecommunication components and other electronic equipments. Usually a plastic component will be lighter in weight which in aerospace Industry especially always has been an important consideration. Weight savings have assumed greater importance in other market for example, motor vehicles, where a key factor in achieving greater fuel economy has been reduction in weight overall brought about by changes from metals to plastics, ABS chrome plated parts are one such example for weight reduction in automobile components. Plating on plastics therefore has been developed and widely concerned in manufacturing printed circuit boards, automobile parts, in the electromagnetic interference (EMI) shielding application, regulator knobs for fan cooler, push buttons, etc. After plating there is no apparent difference visually between metal and plastic parts. For electroplating, the plastic model needs to be made electrically conductive in order for the electroplating process to work, and in this paper an attempt has been made to show and understand the development of electroplating setup for plating ABS plastics.
